On 1982 Jul 09 at UT 01:05-01:25 P. Moore (Selsey, UK, 12.5"? reflector, seeing III) found that Aristarchus was very bright and slightly blue. Cameron comments that Moore's eyesight is not very blue sensitive. The Cameron 2006 catalog ID=175 and weight= 4. The ALPO/BAA weight=2.
On 1982 Jul 09 at UT01:05-01:25 P. Moore (Selsey, UK, 12.5" reflector, seeing=III) found that Grimaldi A was the 2nd brightest feature on the Moon, and that there was colour detected with a Moon blink device on the floor of Grimaldi. The Cameron 2006 catalog ID=175 and the weight= 4. The ALPO/BAA weight=3.
On 2005 Oct 21 at UT 13:07-14:27 R. Gray (Winnemucca, NV, USA, 15cm F/9 refractor, x228, seeing 4-5, transparency 5-6) observed a possible TLP in Macrobius. His report is as follows: "Blinked Macrobius with Wratten Filters Blue 38A and Red 29. Macrobius became almost invisible through the Blue 38A and essentially the same as in white light through the Red 29. The interior of the crater was completely in shadow. The only part of the east wall that was visible was an apparent high point still in the sun and seen as a bright point of light. This faded into darkness before 13:56UT. No sign of any illumination of the east wall crater interior or the interior of the west wall was seen during the observation period. The outer west wall was a rough looking, complicated mix of deep shadow and illuminated sunlit terrain." The observer concluded that there was not a TLP - although he did get a filter reaction, this may have been due to the different densities of the filters? ALPO/BAA weight=2.
Macrobius 1898 Dec 31 UTC 20:00 Observed by Goodacre (Crouch End, England, 12" reflector) "Interior nearly filled with shadow at sunset. Inner E.wall very bright-a distinct penumbral fringe to black shad. cast on it from W.wall. Seen best using high powers. (Firsoff & MBMW give date as just 1895 but must be wrong-phase - see app.ref.)" NASA catalog weight=4 and catalog ID #304. ALPO/BAA weight=2.
On 1989 Aug 20 at UT13:55 M. Lucas (Melbourne, Australia, naked eye) witnessed a "pin-point flash" in the middle of the lower right quadrant of the Full Moon. Foley suspects that this was in the Proclus region? The Cameron 2006 catalog ID=374 and the weight=2. The ALPO/BAA weight=2.
On 1989 Jan 26 at UT 03:45 De Groof (Belgium) noted a white few second long flash from Copernicus crater. The Cameron 2006 catalog ID=347 and weight=3. The ALPO/BAA weight=3.
Aristarchus 1969 Sep 30 UT 04:46-05:10 Observed by Maley, Saulietis (Houston, TX, USA, 16" reflector, x130) "Intermittent blue color on SE wall, verified by others. At 0500h, taking 10s to reach max. then slowly disappeared. Gap appeared after 1st event. Drawing." NASA catalog weight=4. NASA catalog ID #1202. ALPO/BAA weight=4.
Aristarchus 1957 Oct 13 UT 07:00?$ W.Haas, according to the 1978 NASA Catalog is supposed to have seen a bright spot of light -- "explosion" in this crater. Confirmation of activity in Aristarchus - Three independent observations within 4 hours. Cameron 1978 catalog weight=5 and TLP ID No.=676. Private comunication with Haas shows that he recorded nothing unusual on the 12th or 13th. Therefore an ALPO/BAA weight of 1 has been given until this matter is cleared up.
Fracastorius 2022 Apr 21 UT 01:35-02:12 A. Amorim (Brazil - 90mm f/10 refractor, 25 & 10mm eyepieces ) observed visually a little bright spot near the centre of the otherwise completely shadow filled crater. The bright spot was surrounded by a coma effect. Clouds intervened but by 02:12 the spot was no longer visible, just a thin patch of light close to the crater's centre. Observations started when the Moon's altitude was 15 deg and ended when it was 23 deg above the horizon. ALPO/BAA weight=1.
On 1991 Jul 31 at UT 07:50 D. Louderback (South Bend, WA, USA, 3" refractor) observed that the south floor of Aristarchus was wellow - "almost gold, spilled over S wall on ray toward Herodotus". Cameron comments that Bartlett often reported a yellow floor but not a spill of the colour over to the external ray. Cameron also comments that Louderback's refractor would refract more in blue light than in yellow, therefore she did not think that it was due to chromatic aberation. The Cameron 2006 catalog ID=431 and the weight=3. The ALPO/BAA weight=2.
On 1991 Jul 31 at UT 07:50 D. Louderback (South Bend, WA, USA, 3" refractor) found that all of Mons Piton was "unusually dark". Points D, C (E and S resp), usually brightest points, but this time were not bright. "Whole mt was as dark as W wall usually is at this time. In violet filter Piton disappeared completely, but was a little brighter in red filter and points D & G showed. Color not seen by eye. No albedo measured. Suggests red event." Cameron rules out chromatic aberation from Louderback's refractor. The Cameron 2006 catalog ID=431 and the weight=3. The ALPO/BAA weight=1.
Stochard of Dublin, Ireland, saw naked eye at 10:30UT on 1862 Nov 12 Aristarchus as extraordinarily bright as a bright spot on the Moon. This was seen in daylight with the waning crescent. Cameron 2006 extension catalog ID=6 and weight=3. ALPO/BAA weight=2.
Plato 1975 Jun 29/30 UT 23:05-00:30. Foley (Wilmington, UK, 12" reflector, seeing, III, good clarity transparency). At 23:05, blue was seen on the inner wall:floor southern boundary, and red on the corresponding northern floor:wall boundary. However by 00:30, blue was now on the W floor:wall boundary, and red on the E floor:wall boundary. Atmospheric spectral dispersion existed in many regions, but did not change like the colours in Plato. Similar appearance craters such as Grimaldi, Schickard, and Riccioli, were checked for a similar change in colour, but no change was noticed in these. ALPO/BAA weight=1.
On 1991 Dec 28 at UT 02:10 P. Moore (Selsey, UK) could see no detail on the floor of Plato crater. This report needs to be read in context with the comments by Cameron for A.C. Cook's observation of the floor of Plato on 1992 Jan 18 - Cameron 2006 catalog ID=438.
On 1974 Jun 12 at UT0256 an unknown observer noted a dark blob on the northern edge of the floor of Pitatus crater.
Grimaldi 1998 Mar 22 UT05:15-06:00 S. Beaumont (Windermere, UK, 127mm rich field refractor, seeing III, transparency Good) observed that the northern half of Grimaldi seemed much lighter than the southern half. She comments that she has seen this before in last quarter phases, but it was really quite marked how lighter the northern half was on this occasion. The ALPO/BAA weight=1.
Aristarchus 1976 Oct 18 UT 07:42 Observed by Bartlett (Baltimore, MD, USA, 4.5" reflector and 3" refractor, S=3, T=5) "Inner E. wall 6 deg with very large EWBS at 8deg. No viol. color anywhere & floor was gray at 4 deg (very low). C.p. is only 8 deg. At base of c.p. between peak & advancing shadow a very faint but definite red glow was seen. It was also seen later in the 3" refr. Was confined to W.base of peak & no color on E. base tho. carefully searched for. This red glow was unique in his experience of 28 yrs. His obs. thru. col. 223deg saw nothing more unusual." Cameron 1978 catalog weight=4 and ID #1455.
On 1964 Jun 28 at UT 08:20-09:10 Schmidling, St Clair, and Platt (Riverdale, New York, USA, 8" reflector, x256) observed in the Aristarchus, Herodotus, Schroter's valley area: two red spot glows, glimmer, looked like ruby gems. Cameron says that the date was predicted by Greenacre and looked for. The Cameron 1978 catalog ID=817 and weight=5. The ALPO/BAA weight=4.
Aristarchus 1971 Oct 22 UT 19:43-19:56 A.Mackay (Hatton, UK, 15cm reflector, x50) observed a pale pink on the W(IAU?) half of Aristarchus and a pale shade of blue on the E(IAU?) half. The effect faded from 19:56UT onwards and had gone 2 minutes later. No information on whether other craters exhibited this effect, given. Burgess, who observed later did not see any colour. ALPO/BAA weight=1.
Daniell 1979 Apr 02 UT 21:45-22:14 Obseved by Madej (Huddersfield, UK, 158mm reflector, f/4.2, x36-110, seeing II-III) "Obscuration seen" BAA Lunar Section Report. Cameron says that this was a bright white cloud that covered three quarters of the crater. A yellow filter was used at 21:48, but the cloud was still white, albeit thinner (at x110). By 22:14UT the TLP was barely visible and again no colour seen. Buczynski (Lancaster, UK, seeing = poor) saw spurious colour. Later (22:31- 22:46UT?) Mellor obtained some photos, but these revealed no colour. The Cameron 1978 catalog ID=48 and the weight=3. The ALPO/BAA weight=2.
On 1983 Jan 19 at UT 18:00-19:00 G. Amery (Reading, UK) discovered that Aristarchus could not be seen in Earthshine, this was odd because less prominent features could be seen. Other observers (Moore and Foley) confirmed the very low brightness of the crater. The Cameron 2006 catalog ID=197 and the weight=2. The ALPO/BAA weight=2.
On 1983 May 17 Foley (Kent, UK, 12" reflector)observed Aristarchus at 22:10 and noted that it had the same rose-violet colour as had been seen by him a day earlier. The Cameron 2006 catalog ID=220 and the weight=0. The ALPO/BAA weight=2.
On 1983 Jan 19 at UT 18:00-19:00 G.W. Amery (Reading, UK) found that Messier was difficult to define. The Cameron 2006 catalog ID=197 and the weight=2. The ALPO/BAA weight=1.
Proclus 1983 Jan 19 UT 20:36-21:00 Observed by Cook (Frimley, UK, Seeing III, Transparency, Moderate) "Colouration seen". BAA Lunar Section Report. ALPO/BAA weight=2.
Leibnitz Mountains 1948 Apr 14 UT 20:00? Observed by Wilkins (Kent, England, 12.5" reflector) " S.cusp prolonged -- detached peaks -- starlike pts. connected by fine filaments brighter than earthshine. (Barcroft, Haas, Vaughan, Moore & Firsoff also have seen similar phenom.)(just sunlight catching high peaks?)." NASA catalog weight=2. NASA catalog ID #502. ALPO/BAA weight=1.
On 2000 Feb 11 at UT19:00 G. North (Norfolk, UK) telephoned TLP coordinator, Patrick Moore, to report a possible colour anomaly in Aristarchus. Moore had poor conditions in Selsey (UK) and saw nothing unusual. However by this time North was reporting that, the colour was fading. Two other BAA members were alerted, but were clouded out. The ALPO/BAA weight=3.
On 2001 Apr 29 at UT 20:50 R. Braga (Italy) reported that without any filter, the brightness of the east wall of Torricelli B was halfway Torricelli C (faintest) and Moltke (brightest). By insering a Wratten 25 red filter though, the crater was slightly more evident. However using a blue Wratten 39A filter, the crater vanished completely, whilst Toricelli C remained. The ALPO/BAA weight=3.
Webb (England, using a fluid achromat) saw brilliant minute spots and streaks in Mare Crisium dotting its surface. This was seen near first quarter. Cameron states that Schroter, Betr?, Madler, Slack and Ingall had all seen it this way at times. Cameron 1978 catalog iD=111 and weight=3. ALPO/BAA weight=2.
Plato 1948 Apr 15 UT 20:00? Observed by Thorton (Northwitch, England, 9" reflector) "Brilliant orange-yellow flash 1 km inside E. rim (similar to earlier #500 LTP flash in the dark)" NASA catalog weight=3 (average). NASA catalog ID #504.
Aristarchus appeared to glow in Earthshine with a faint green luminescence that moved from side to side. A bright blue central spot was also seen. The green colour was detected in two seperate eyepieces. Observation made from England. Cameron 2006 catalog extension ID=266 and weight=2. ALPO/BAA weight=2.
On 1981 Mar 12 at UT 19:25-20:30 Butler (of Brixton, UK, using a 10" reflector at 32-64x) noticed that Aristarchus was not visible, although the Earthshine was very obvious. Foley (of Kent, UK, and using 12" reflector) noticed that the crater was only just visible but Plato could definitely be seen. Cameron's 2006 TLP extension catalog ID=125 and weight=0. ALPO/BAA weight=2.
On 1984 Apr 08 UT 19:50 Mobberley (14" reflector, x194, seeing III-IV, Transparency Fair-Poor, Cockfield, UK) found that Torricelli B's shadow was 1/2 the way across the floor, which was normal, but that there was a very dar grey/brown shroud around the carter, out to several radii. The ALPO/BAA weight=1.
Ptolemaeus 2020 Feb 01 UT 19:40-19:50 P. Sheperdson (York, UK, 102mm Mak - BAA) saw an "ashen" sliver of bright light across the floor. Images taken. This maybe normal appearance - though observer re-observed in May and found the effect different in that there was no "ashen" like effect. Visual sketches and time lapse image sequences welcome. If doing visual work - try using a polaroid filter and rotate it to see if that makes any difference. For imaging work, please over-expose slightly to bring out detail on the floor; you could also try colour imaging of the floor as an interesting experiment - though for comparison purposes image other terminator features exhibiting shadow spires. ALPO/BAA weight=1.
On 1983 May 20 at UT00:00-03:00 K. Marshall (Medellin, Columbia) noted that Mons Piton was too bright near the terminator and was surrounded by shadow. A sketch was made. The mountain appeared segmented with one thin shadow line. The mountain looked like a Mexican Sombrero hat. This appearance is normal. What was abnormal was that Piton was brighter than Proclus, and only slightly fainter than Censorinus. The CED brightness measurements were normal Piton=3.6, Proclus=3.5 and Censorinus= 3.7. Please check to see whether this is still the case. The cameron 2006 catalog ID=221 and the weight=3. The ALPO/BAA weight=1.
Dome W. of Manillius 1965 Dec 30 UT 10:35 Observed by Newport (England, 4" refractor x180) "White patch or haze, everything else was sharp" NASA catalog weight=3 (average).
Alphonsus 1972 Sep 15 UTC 18:48-18:56 Observed by Hopp (13.25E, 52.5N, 75mm refractor) "Diffuse white to blue area within the crater - not sure" T=4, S=4. Ref: Hilbrecht & Kuveler Moon & Planets (1984) Vol 30, pp53-61.
On 1953 Sep 16 UT03:00 R.M. Lippert (San Diego, CA, USA, 20cm Cassegrain reflector, x90)saw a bright magnitude 1 flash on the Moon, that was probably on the east rim of Werner(?) crater. It is unclear if the observer meant it was really magnitude 1, or was what a magnitude 1 star would have looked like. The flash was yellow-orange in colour. Observation described in the "Observations and Comments" column in the December, 1953 Strolling Astronomer (Vol. 7, No. 12), on page 170. The ALPO/BAA weight=3.
Pickering 1971 Jan 04 UTC 20:29-20:37 Observed by Collier (London, England) "Between Saunder and Rhaeticus, apparently coming from Pick. After 2027h it dimished with extraordinary swiftness, like a light goes out. (experienced observer)" NASA catalog weight=?. NASA catalog ID # 1281. Note that this crater was previously called E.C. Pickering before the IAU renamed some craters.
2004 Nov 20 UT 01:43:36 R. Spellman (120mm F8.3 refractor at prime focus, PC23C CCTV camera, via a DVD recorder) recorded a flash of light. The ALPO/BAA weight=1.
2004 Nov 20 UT 02:34:03 R. Spellman (120mm F8.3 refractor at prime focus, PC23C CCTV camera, via a DVD recorder) recorded a flash of light. The ALPO/BAA weight=2.
On 2009 Nov 25 UT18:42-21:03 P.Abel, T.Little and C.North (Selsey, UK, 15" reflector, seeing II-III, transparency very good), all saw visually a brownish tinge on the north west rim of Eratosthenes crater. P.Abel made a sketch and T.Little took some high resolution CCD images, some of which were through coloured filters. Checks were made for spurious colour, but none was seen elsewhere on the Moon. The eyepiece was changed but this made no difference. M.C.Cook (Mundesley) was observing with a smaller scope at the same time, but saw no colour, however observing conditions were worse. W.Leatherbarrow (Sheffield, UK) was observing with a instrumenet mid way in size, and saw a brownish tinge in the NW rim area, but saw a similar colour elsewhere and put this down to spurious colour. Normally multiple observers seeing the same thing would result in a weight of 4, however as this was only observers at Selsey and some of the evidence contradicts, I am allocating an ALPO/BAA weight=3.
Eratosthenes 1947 Jan 30 Mean Col. 16deg. Observed by Hill (UK) "Main peak of massive central mountain group appeared to be in a shadowless having regard to it's claimed height of 6,600 ft. The whole of the floor to the west should have still been in darkness. Instead immediately to the west was a dark (intensity 1.5-2) region extending almost to the foot of the bright inner wall and very diffuse in outline. The observation could not be followed through due to increasing cloud, but on the following night all was normal."
1996 Apr 27 UTC 02:26-03:14 Observed by Spellman (Los Angeles, CA, USA) " 02:26 U.T. Sunrise on Tycho 3/4 of the crater was in shadow, topmost section of the central peak was in sunlight. In white light brightness of the central peak rivaled the brightness of the Eastern (sunlit) wall. No change was detected in red light, however in blue light definite strong darkening was observed. Blink obtained when viewing thru 25A and 38 filters. At 2:52 U.T. in the poor to fair seeing the apparent size of the central peak in white and red light was the same, in blue light the central peak in white and red light was the same, in blue light the central peak size shrank to 1/2 white and red size (and brightness). Also appearing sharper. Comparison was made also with the central peak of Alphonsus, no changes were observed. The significant part of the observation was the relative brightness of the central peak to the sunlit rim in white and red light, they appeared almost identical with the crater rim, being just slightly brighter. In blue light the brightness of the central peak was reduced by at least half while the rim brightness was not, (relative to one another). I strongly believe that this was a real event. The shadow filled portion of Tycho was examined for any abnormalities but none were observed. Observations were ended shortly after 3:14 U.T. due to clouds. I also conducted about 20 Moon blink observations during this observing run and got the same strong reaction each time." ALPO/BAA weight=3.
On 1936 Oct 25 at 01:35 UT W. Haas (Alliance, OH, USA, 12" reflector) saw small bright spots on the floor of Eratosthenes, (Pickering's atlas 9A, col. 30deg, shows no spots - according to Cameron). Cameron 1978 catalog TLP=417 and weight=4. ALPO/BAA weight=1.
Piton 1958 Sep 23 UT 00:00? Observed by Moore? (UK?) "Enveloped in an obscuring cloud-like mist" NASA catalog ID 697. NASA catalog weight=2. ALPO/BAA weight=2.
Messier and A 1966 Dec 22 UT 06:00-06:30 Observed by Kelsey (Riverside, CA, USA, 8" reflector, x200, S=G, T=P) "Blinks on floors of both craters (blink device not stated)" NASA catalog weight=2 (low). NASA catalaog ID #1004.
Cichus 1975 Sep 15 UT 11:15-11:30 G.Ryder (Corinda, Australia, 25cm reflector, x250 & x380, seeing good but with some cloud) The interior W. wall of this crater (on the lip) appeared hazy - difficulkt to bring detail into focus. Neighbouring craters/detail were sharp. Details in the crater wall interior were starting to become visible as time went on, but it had clouded over by 11:30. A Moon Blink was used but no colour was detected. ALPO/BAA weight=1.
2004 Jan 02 UT 09:05 (approx) M. Collins (Palmeston North, New Zealand, ETX 90, seeing 3, clear) saw a possible(?) flash north of Carlini D at about 16W, 35N in adverted vision. It lasted only a split second. The ALPO/BAA weight=1.
A region of the Mare Imbrium was extremely bright, giving a reading of 8 out of 10 on the Elger scale. Cameron notes that from photos of the Full Moon, the area appears to normally be the brightness of Archimedes floor i.e. 3.5 out of 10 on the Elger scale. Atmospheric seeing was excellent and the observer could see a lot of fine detail with their 2.4" and 3" refractors. Cameron 2006 catalog extension ID=62 and weight=3.
Bulialdus 1979 Aug 03 UT 21:36-21:48 Observed by Cook (Frimley, UK, seeing III, Moonblink device) "Bullialdus eastern side of the crater looked brighter in red i.e. rim and exterior, extending to the south slightly and this reddish areas was slightly hazy. At 21:41 it clouded over but at 21:47-21:48 it cleared briefly and effect was noted again. Also Darney appeared very visible through the red filter. Probably spurious colour as the Moon was -18 deg in declination and the whole Moon had a slight brownish tinge" ALPO/BAA weight=1.
Darney observed by Cook (Frimley, UK, seeing III, Moonblink device) See TLP report for Bullialdus (eastern side) concerning reddish areas. At 21:41 it clouded over but at 21:47-21:48 it cleared briefly and the effect was noted on Bulialdus again. Also Darney appeared very visible through the red filter. Probably both effects were spurious colour related as the Moon was -18 deg in declination and the whole Moon had a slight brownish tinge. An ALPO/BAA weight of 1 is assigned to this TLP."
In 1820 Oct 17 at UT 20:00 an unkown observer reported in Mare Imbrium, south of Sinus Iridum (30W, 40N) some brilliant spots. The Cameron 1978 catalog ID=80 and weight=1. The ALPO/BAA weight=1.
Plato 1966 Dec 23 UT 06:15-07:10 Observed by Kelsey (Riverside, CA, USA, 6" reflector, S=P, T=G) and Coralitos Observatory (Organ Pass, NM, USA, 24" reflector +Moonblink) "3 brilliant spots on floor, all showed blinks, (permanent colored Ground features ?). Not confirmed by Corralitos MB." NASA catalog weight=2 (low). NASA catalog ID #1005.
Gassendi 1977 May 28/29 UT 20:45-21:15 Observed by D. Sims (Dawlish, Devon, UK) saw a hazy area on the south east floor that was normal in red and white light but darker in blue. This was partly confirmed by J-H Robinson (Devon, England, 10" reflector) 21:24-23:12 who saw the south east floor of Gassendi to have a loss of detail - but no colour seen, although at 21:57-21:58 it was slightly brighter in red than in blue briefly. P. Doherty (22:45-23:15) did not see anything ususual. D. Jewitt (22:22-22:55) did not reveal anything ususual, apart from spurious colour. The Cameron 1978 catalog ID=3 and ID=1463. The ALPO/BAA weight=3.
On 1990 Sep 30 at D. Darling (Sun Praire, WI, USA, 12.5" reflector, x150) observed a red spot on the west wall (bright in red filter and faint in the blue filter. No filter reactions were found elsewhere. Gassendi had much detail visible. A sketch was made. BAA observers in the UK were alerted but they could not observe due to cloud. Cameron 2006 extension catalog ID=411 and weight=5. ALPO/BAA weight=3.
Aristarchus, Schroter's Valley, Herodotus 1881 Aug 06 UT 00:00? Observed by Klein (Cologne, Germany, 6" refractor, 5" reflector) "Whole region between these features appeared in strong violet light as if covered by a fog spreading further on 7th. Examined others around & none showed effect. Intensity not altered if Aris. placed out of view." NASA catalog weight=4 (high). NASA catalog ID #224. ALPO/BAA weight=3.
Plato 1982 Jun 02 UT 22:00. Mobberley could not see the central craterlet on the floor of Plato tonight. Foley notes that he could only just see the central craterlet on nights of 2-5th Jun and it was of reduced in brightness from normal. North reported that the floor seemed nearly black, but brighter in a green filter (x144 magnification used). All three observers compared the Plato area to other areas for reference. All the above seems normal, apart from the floor being brighter in the green filter. Cameron 2006 extension catalog ID 170 and weight=5. BAA/ALPO weight=1.
Aristarchus 1975 Oct 16 UT 20:00? Observed by Foley (Kent, England, 12" reflector) "Deep blue-viol. spot in NW (IAU?) interior corner." NASA catalog weight=3. NASA catalog ID # 1413. ALPO/BAA weight=1.
G. Ward (a lunar observer for 15 years) observed an area just south west of Mersenius C to be blurred and in a greenish cloud. The green colour was more like that of dead grass than one gets from a neon bulb. The effect was seen from 04:50-04:57UT, but could have been going on before it was first noted at 04:50-UT. Seeing was 6-7/10 4" Refractor (2 element). refractor had been used hundreds of hours before (over a 10 year period) with no similar colour was seen. The observer checked other areas but did not see any similar effects. They also rotated and changed eyepieces, but this made no difference to the TLP. The TLP site seen was picked up on an image taken earlier at 04:47UT by W. Bailley, from Sewell, NJ, USA. Unfortunately the area concerned, a mountain on the image, was saturated and so we cannot tell if a colour was present there and the seeing was poor.
On 1889 May 11 at 22:00? UT an unknown observer saw an ink black spot on the rampart of Gassendi. It had not been seen before ar at the next lunation or indeed ever again. Cameron 1978 catalog ID=261 and weight=3. ALPO/BAA weight=2.
Cobra Head 1949 Feb 10 UT 00:00? Observed by Thorton (Northwich, England, 18" reflector) "I was examining the Cobra Head of the Schroter Valley, when I noticed what seemed to be a diffuseed patch of thin smoke or vapour, apparently originating from the valley on the E. Side where the landslip is, and spread over the edge on to the plain for a short distance. Every detail of the edge of the valley was perfectly clear and distinct except where this patch occurred, but there the definition was poor and very blurred" NASA catalog weight=4 and catalog ID #515. ALPO/BAA weight=1.
Bullialdus 1974 Sep 27 UT 22:45-23:40 Observed by Findlay, Ford (Dundee, Scotland, 10" refractor, 150x, 180x, filters) "Saw yellowish- orange color in crater. After clouds passed at 2300h color still there & gave a slight blink which no other craters did. Not seen in red filter, dark in blue. Ford saw it along ridge fr. c.p. to SW wall. Alert did not bring confirm. as clouds intervened for all others." NASA catalog weight=4. NASA catalog ID #1394. ALPO/BAA weight=3.
On 1990 Oct 1st at 00:44-01:24UT D Darling (Sun Praire, WI, USA) observed that Gassendi still had a blink effect when viewed through blue (Wratten 38A) and red (Wratten 25A) filters. No effect was seen on Aristarchus. Gassendi was brighter in the red filter and this was confirmed by Weier. Sketches were made and brightness measurements taken. Both observers used a 12.5" reflector x159. At 01:00UT the NW wall was 7.5, the SW wall 8.0, the S. wall 7.5, the floor 6.0, the outer E. wall 8.0, the N. floor 5.5. Gassendi A W. wall was 9.5,l Aristarchus W. floor was 8.0, NW wall 8.0, shadowed floor 0.0, E. outer wall 7.0, NBP 5.5, area between Aristarchus and Herodotus 6.0, and the comet like tail: 8.2 on the E. and 8.5 on the W. The Cameron 2006 catalog extension TLP ID=412 and weight=5. The ALPO/BAA weight=4.
Aristarchus 1971 Sep 01 UT 20:45-21:05 Observed by Neville, Cunnington (Nottingham, UK, 4" refractor x180, altitude, low) "Saw a bright glow, especially in E. wall (Confirm. but not indep.?)" NASA catalog weight=3. NASA catalog ID #1310. ALPO/BAA weight=1.
Aristarchus 1976 Sep 05/06 UT 18:45-01:35 Observed by Prout (England?, 12" reflector, S=III-II), Foley (England, 12" reflector), Moore and Spry (Sussex, England, 12" reflector) "Viol. hue on crater on W. wall, especially NW corner seen by Prout & 2 Foleys. Moore & Spry did not see color. All obs. noted that the crater was dull
Proclus 1970 Oct 12 UT 00:54 Observed by Bartlett (Baltimore, MD, USA, 4" reflector, 51x-181x) "Floor darkened to intensity 1.5 deg (albedo) & c.p. became invis. Next day c.p. reappared & was 5 deg bright & 6deg bright on 15th" NASA catalog weight=4 (high). NASA catalog ID #1277.
Observed by Bartlett (Baltimore, MD, USA, 5" reflector x180, S=1-5, T=5) Pseudo peak visible within floor shadow at 03:10h" NASA catalog weight=4 (high). NASA catalog ID #671. ALPO/BAA weight=3.
Deslandre - 1965 May 12 at UT 19:10 E. Penzel (Rodewisch, East Germany) was taking a sequence of images during the impact of the Soviet Lunik 5 (upper stage of the carier rocket?). He detected a tens of km scale elongated cloud after the impact over a duration of 9.5 minutes. This was near to Deslandre crater. However there are differences between the images elsewhere on the Moon, possibly due to different exposures or some other effects and it is not 100% sure that what he detected was impact debris/cloud?. The ALPO/BAA weight=1.
On 1933 Oct 01 at UT 03:00 Rawstron (USA, 4" refractor, x330) observed the following in Mons Pico B: "Haze -- much narrower & elongated than on Sep. 1". The Cameron 1978 catalog ID=407 and weight=3. The ALPO/BAA weight=2.
Schickard 1972 Sep 19 UT 19:45-20:25, 20:00-23:30 Observed by Watkins (Herts., Eng. 4.5" reflector, x225, S=G) Amery (Reading, Eng.m 12" reflector?), Fitton (Lancashire, Emg., 8.5" reflector) and Moore (Selsey, Eng., 12.5" reflector?, 4.5" refractor 45-225x, S=P) "Luminous, nebulous spot attracted Watkin's att'n. Got brighter. Checked 'scope--not instru. Obj. had greenish-gray color, size @ 15km. Amery & Fitton with blink devices noted nothing unusual at later times (2000-2330h). Aris., Plato, Gass. were neg. at 1930-2025h (date not given, guessed at fr. available info.). Turbulence, lasting secs. at a time." NASA catalog weight=2. NASA catalog ID # 1344. ALPO/BAA weight=2.
On 2002 Feb 24 UT 05:15-05:35 W. Haas (Las Cruces, NM, USA) observed an obscuration in Herodotus - the shadown was, almost, but not completely black. ALPO/BAA weight=2.
On 2002 Feb 24 UT 06:05-06:20 W. Haas (Las Cruces, NM, USA) observed that the shadow was, almost, but not completely black. This might have been related to the observing conditions. ALPO/BAA weight=2.
On 1955 Oct 28 at UT00:00? Kozyrev (Crimea, Soviet Union, 50" reflector) detected in Aristarchus Fraunhofer lines in UV spectra that were much narrower than in the solar spectrum. This indicated luminescent glow which overlapped contour(?) lines. Greatest after Full Moon, but fluctuated monthly with no indication of solar activity effect. The Cameron 1978 catalog ID=621 and the weight=5. The ALPO/BAA weight=5.
Observed by Haas (Las Cruces, NM, USA) "Temporary greyness seen in interior shadow." ALPO/BAA weight=3.
On 1955 Oct 28 at UT 00:06 W. Taylor saw a naked eye flash on the Moon in the north east area, on the edge of Mare Vaporum. The flash was intense and radiated to a large area. The duration was 1/4 seconds.
Aristarchus, Schroter's Valley, Herodotus 1881 Aug 07 UT 00:00? Observed by Klein (Cologne, Germany, 6" refractor, 5" reflector) "Whole region between these features appeared in strong violet light as if covered by a fog spreading further on 7th. Examined others around & none showed effect. Intensity not altered if Aris. placed out of view." NASA catalog weight=4 (high). NASA catalog ID #224.
Aristarchus 1981 Mar 17 UT 22:40-23:25 Observed by Moore (Selsey, England, 15" reflector, seeing III) "Aristarchus very bright according to Crater Extinction Device and a coloured blink detected" BAA Lunar Section TLP report. ALPO/BAA weight=1.
On 1965 May 12 at UT 22:20 H. Miles (UK) found a possible obscuration in Bailly crater. Most of the region was as sharp as normal, but the central area was greyish and blurred. Although the observer concerned considered themselves a non-experienced observer, another BAA Lunar Section observer saw the same effect. ALPO/BAA weight=2.
Aristarchus Area 2004 Nov 22 UT 04:58-05:49 Observed by Gray (Winemucca, NV, USA, 152mm f/9 refractor, seeing 4-5, trasparency 4-5, x114, x228) "Blinked Herodotus with Wratten filters Blue 38A and Red 25. The illuminated west crater wall stood out brilliantly in blue light, much more so than in white light. This was true also of Aristarchus. Red light did not increase contrasts in Herodotus any more than they were in white light. Shadows in Herodotus appeared as black as the night west of the terminator and remained that way throughout the observing period. No TLP seen in Herodotus tonight. A possible TLP was seen to the west of Herodotus near the terminus of Schroters Valley. It was noted at the beginning of the observing period that there were four very bright spots of light, one near the end of Schroters Valley, the other three grouped together a little farther north. Although not far from the terminator they were definitely east of it. It was noted that all of them nearly vanished in the Blue 38A filter while Aristarchus and the rim of Herodotus gleamed brilliantly. At 5:19UT it was noted that the most brilliant of the four lights, the one near the terminus of Schroters Valley, had faded almost to invisibility in white light. When first seen it had been brighter than Aristarchus. It remained very dim after this through the remainder of the observing period, and was unchanged at 7:35-7:49UT when I again examined the area. The other three bright spots remained brilliant and unchanged."
Aristarchus 1973 Aug 10 UTC 20:14 observed by Baumeister (48.63N, 9.25E, 110mm reflector, T=2, S=2) "Orange to red colours at the crater floor disappeared until 21:04" - Hilbrecht and Kuveler, Earth, Moon & Planets, 30 (1984), p53-61. ALPO/BAA weight=2.
Plato 1973 Aug 10 UT 22:45 observed by Robinson (Devon, UK). Observer noticed that the lighter areas on the floor were more distinct in red than in the blue filter. ALPO/BAA weight=1.
All observers saw a blue tinge seen inside and outside the crater. Marshall observed a bright spot in the middle of the crater floor and thought perhaps that it was a central peak. No central peak can be found on Lunar Orbiter images. Cameron 2006 Catalog extension ID=214 and weight=5. ALPO/BAA weight=4.
Proclus 1976 Sep 06 UT 02:00 Observed by Bartlett (Baltimore, MD, USA, 4.5" reflector 45-300x, S=3, T=5) "Nothing vis. on floor of 2deg brightness. Usually floor ray & Proc. A are vis. at this col. & c.p. is 5 deg bright. (must have been 2 deg tonite)." NASA catalog weight=4. NASA catalog ID #1450.
Gassendi 1939 Aug 27 UT 02:00 Observed by Haas? (NM? USA, 12" reflector?) "NE part of c.p. was I=6.4, compared with I=9.4 on 9/28/39 (see #462) under similar cond.@ NASA catalog weight=4 (high). NASA catalog ID# 458.
Cobra Head, Aristarchus 1964 Feb 25 UT 02:37-02:38, 02:39-02:42 Observed by Budine (Binghamton, New York, USA, 4" refractor, x250, S=6, T=4) "Red flashes" NASA catalog weight=3 (average). NASA catalog ID # 802.
Proclus 1972 Dec 17 UTC 18:30 Observed by Farrant (Cambridge, England, 8.5" reflector) "Crater appeared very bright (Apollo 17 Watch)." NASA catalog weight=2 (low). NASA catalog ID #1359.
Blanco, J. Vidal, of Gijon, Spain (3" refractor x72) noticed an unfamiliar very bright center near to Encke. Cameron suspects that this was Encke B crater on the basis that it is a prominent small crater near to Encke. Cameron 2006 catalog extension ID=410 and weight=2. ALPO/BAA weight=1.
Rays of(?) (in?) Herodotus 1955 Oct 28 UTC 18:30 Observed by Kozyrev (Crimea, Russia, 50" reflector, spectragraph) "Spectrum 3934A (K of Ca). 3964 (H of Ca) change in luminosity. 13% in H, 19% in K, 2% in H, 3% in K. in photo-line-depth method" NASA catalog weight=5 (very high). NASA catalog ID #622. ALPO/BAA weight=5.
Mersenius 1975 Jun 21 UT 21:50-22:45 Observed by McConnell (Northern Ireland, 6" reflector) Moore? (Sussex, Enland, 15" reflector, 5" refractor, S=F), Reading (Rushden, England, ? 14" reflector) and Foley (Kent, England, 12" reflector, S=P) "McConnell saw an obscur. starting at 2150h which disappeared at 2245h. Moore(?) alreted, saw no anomaly in 15 in refl. & 5-in refr. under fair conditions from 2209-2228h. Reading reported neg. fr. 2250-2345h (after phenom.). Foley reported color in it but also a crater to S. of it & Aris., prob. due to seeing conditions." NASA catalog weight=5. NASA catalog ID#1408. ALPO/BAA weight=3.
1954 Aug 11 observed by Firsoff (Somerset, UK, 6.5" reflector, x200) "Brilliant in red filter, variable)" NASA catalog weight=4. NASA catalog ID #570. ALPO/BAA weight=3.
Aristarchus-Herodotus 1971 Sep 02 UTC 20:00 Observed by Ayeau (Paris, France, 12" reflector, x100) "Brownish-red or maroon seen on Aris. W.wall ridge to Herod. on S.wall of Herodotus" NASA catalog weight=2. NASA catalog ID #1311. ALPO/BAA weight=2.
Babbage 1974 Sep 29 UT 00:00-01:00 Observed by Lord (St Annes- on-Sea, UK, 10" refractor, Wratten 25 and 44a filters, 125x, S=II-III). Activity observed in SW floor between A & W. wall. Details not obscured in either filter, but slightly more darker than surroundings in the blue filter. NASA catalog weight=2. NASA catalog ID #1395. ALPO/BAA weight=2.
Ross D 1965 Apr 14 UT 06:03-06:22 Observed by Harris (Whittier?, CA?, USA, 19"? reflector) "Phenomenon description unavailable. Given at an ALPO meeting" NASA catalog weight=0 (very unreliable). NASA catalog ID #874.
On 1990 Oct 02 at 02:25-02:45UT D. Darling (Sun Praire, WI, USA using a 12.5" reflector at x159, with red and blue filters), saw a blink effect on the west wall of Plato i.e. brighter through a blue filter than through the red. No Colour blinks seen on Gassendi or Aristarchus. Cameron 2006 Catalog TLP=413 and weight=4.
On 1977 May 30 at 21:04-02:13UT J.H.-Robinson noted a loss of detail inside Gassendi, however he did not regard this as a TLP. The effect was also seen by P.W. Foley. Cameron 2006 extension catalog TLP ID=16 and weight=0 ALPO/BAA weight=1.
On 1987 Mar 13 at UT02:00-03:00 De Groof (Belgium, 8" reflector x150, seeing=clear) noted that the north west part of Aristarchus had a blood red shimmering filling the whole crater. A video by Mobberley some 18 hours later, shows variation in Aristarchus. Cameron 2006 catalog ID= 301 and weight=5. ALPO/BAA weight=3.
Schroter's Valley 1897 Oct 08 UT 22:00 Observed by Pickering (Cambridge, Maas., USA, 15"? refractor) "Variations in vapor col. Tillsow, C was largest compared with D&E& most conspicuous 1.3 d after sunrise. Drawing. (time est. fr. given colon.)" NASA catalog weight=3 (average). NASA catalog ID #291.
On 1984 Feb 14 P. Moore (Selsey, UK) thought that there was something odd about Mons Pico in that it looked very bright and gave a good impression of a crater. Cameron 2006 catalog extension ID=241 and weight=5. ALPO/BAA weight=2.
On 1984 Feb 14 P. Moore (Selsey, UK) observed that Plato was darker than the nearby mare and no detail could be seen on the floor or the eastern wall - the later was obscured. At 23:40UT some dimming was still present on the north east wall and still no detail on the floor of Plato. Cook noticed that the eastern floor close to the wall was misty and also noted no detail on the floor. Amery though noted that all parts of the floor were sharp although some darkening was visible in the north west and a hint of obscurtion. The east wall though was quite sharp. Mosely could see the central craterlet but from 8-6 o'clock tricky to define (Foley says that this effect has been seen at this colongitude before). Streak ray across the floor of Plato seen (North) - filter measurements made. Cameron 2006 catalog extension ID= 241 and weight=5. ALPO/BAA weight=2.
Vallis Schroteri 1991 Aug 23 UT 02:19-02:49. Flashing spot at end of SV fluctuated. Herzog, Darling & Weier confirmed spot but not fluctuation. Spot brighter in red than blue, but Cobra Head was bright in blue. No other region was abnormal.
Amery (Reading, England) saw blue in Aristarchus but a photograph did not show the colour. Foley thinks this was spurious colour. Cameron 2006 extension catalog ID=27. ALPO/BAA weight=1.
Promotorium Laplace: 1978 Apr 20 UT19:30-22:35 Peter Foley observed a tiny yellow-brown region close the tip of the cape, north east of the precipitous west edge, in the face of the north facing slope. The area concerned was diffuse and varied in density despite the surroundings not varying. Foley notcied no colour elsewhere on the Moon, though Amery thought that he saw some in Aristarchus, but Foley thinks this was spurious. Cameron 2006 catalog extension ID=27 and weight=5. ALPO/BAA weight=3.
Aristarchus-Cobra Head, 1967 Nov 15 UT 05:40-06:00 Observed by Cross, Tombaugh (Las Cruces, NM, 12" reflector x800) and Harris (Tucson, AZ), and Dunlap (Organ Pass, NM, 24" reflector with Moonblink). "Obs. reddish color N. & E. of Aris. & more intense color nr. E.(IAU?) rim of Cobra Head. Red color nr.C.H. confirmed by Tombaugh. Obtained 10 photos between 0543-0549h in 3 spectral bands (blue, yellow, red, & integ. light). No change dur. obs. per. but spot got smaller at moments of good seeing. Isodensitometry of photos. At Corralitos 0152-0155 on 24- in image intensifier & filter sys. photoos at 0320-0330h. Harris at Tucson got spectra. Neither of latter 2 show anything unusual. Its edges were nebulous even at best seeing. Size @ that of Cobra's Head." NASA catalog weight=5 (very good). NASA catalog ID #1053.
Peter Foley (Kent, UK, 8" reflector, seeing=II) noticed that the floor beneath the north wall, and the area over the north wall were indistinct (almost out of focus). Despite looking elsewhere in the crater and surrounds, no other blurring (obscuration of detail) could be seen, indeed everywhere else was sharp and detailed. Foley tried several eyepieces but this made no difference. He used a crater extinction device but found no variations in brightness. There was a slight darkening when he used a red filter in the Moon Blink device. The obscuration effect weakened between UT20:56 and 21:10, was difficult to see at 21:13 and had finished by 00:15. Patrick Moore (12" reflector, Dublin, Ireland) saw nothing unusual when he started observing at UT 22:00. Cameron says "Photos marked at location of phenomenon". Cameron 2006 extension catalog ID=37 and weight=5. ALPO/BAA weight=3.
On 1821 Jan 16 at UT 21:00 S. Cooke (Stonehouse, UK) An effusion of smoke effect, which lasted about a minute, seen. It appeared like the fluttering of a bird and passed over the Moon before it evaporated, and must have been foreshortened, as it seemed in effect to have passed over the whole disc, starting from west of Menelaus, and near Plinius. ALPO/BAA weight=1.
On 1980 Apr 28, Louderback (South Bend, WA, USA using a 8" reflector and a 2.5" refractor) observed a very bright reg region on top of the south west rim of Aristarchus crater. This was on the same side as the ray system between Aristarchus and Herodotus. Louderback noticed some chromatic aberation - blue where he had seen the red patch before. Louderback suspects chromatic aberation was the cause although did not see red in that region ever again. "Patch was between his observation points A and C. Point C was 5 points brighter in the red filter than in the blue." A sketch was made. Cameron suspects that the TLP was real. Cameron 2006 TLP catalog extension ID=92 and weight=3. ALPO/BAA weight=2.
Louderback observed that the south west wall was a creamy deep yellow. There was also strong fluorescent blue on the west wall of the Cobra Head - Schroter's Valley area and this was similar to the violet glare seen on Aristarchus at times. Violet was seen between Aristarchus and the Cobra Head. Seeing coditions were poor. Brightening of a point near C occurred roughly every 10-15 seconds and lasted 0.5 sec - (Cameron concludes that this was not due to the Earth's atmosphere). A 0.2 step drop in brightness was seen on point A (twin spots). Point C had reduced by 0.6 steps. Elsewhere was stable in brightness. Cameron 2006 catalog ID=281 and weight=4. ALPO/BAA weight=3.
Aristarchus normal in red and blue filters however the Cobra Head part of Schroter's Valley was brighter in blue. Indeed it was very dull in red - Louderback says that this was not surprising as the whole areas around Aristarchus is brighter in blue. Louderback is an experienced observer of the Aristarchus area of more than 10 years. Cameron 2006 extended catalogID=63 and weight=1. ALPO/BAA weight=1.
Aristarchus 1975 Oct 18 UTC 20:00? Observed by Foley (Kent, England, 12" reflector) "Deep blue-viol. spot in NW (IAU?) interior corner." NASA catalog weight=3 (average). NASA catalog ID #1415.
Aristarchus and Herodotus UT 20:00? Observed by Areau (Paris, France, 12" reflector x100) "Maroon color covering the ridge(?) E (ast. ?) & the ridge(?) S. of Herod. In 3 or 5 secs. Cloud disappeared after 10 min." NASA catalog weight=3 (average) NASA catalog ID #1312.
On 1979 Aug 06 at 22:24-22:54 P.Madej (Hudersfield, UK, 6" reflector. Purple Wratten 35, and Yellow Wratten 15 filters used) Orange glow seen (at x73) on west side of crater, near the central peak. The central peak was coloured too at x110. At 22:32 (x75) the central peak was brighter than the rest of the area wrough the yellow filter. At 22:34UT at x73 everything looked OK through the purple filter. The TLP was still visible at 22:54. ALPO/BAA weight=1.
Schickard 1940 May 20 UT 20:00 Observed by Moore (England, 12?" eflector) "Fog on floor -- milky appearance, less pronounced than on 8/2/39 (see #456)." NASA catalog ID #465. NASA catalog weight=4. ALPO/BAA weight=2.
Plato 1971 Jan 10 UTC 20:17-20:42 Observed by Taylor (Slough, England, 8.5" reflector) "Blink (dark gray to black), 13x3km diam. on E. wall & floor in indentation in wall. Smaller by 2028 h. gone at 2035h. Reappeared at 2028h & gone completely at 2042h)." NASA catalog weight=3 (average). NASA catalog ID #1282.
Mare Humboldtianum 1951 Jan 21 20:47-22:00 UT observed by Baum (Chester, England). The appearance of some mountains on the limb appeared to change over time, with some mistiness. ALPO/BAA weight=2.
Madler 1940 Aug 17 UT 06:45 (Cameron gives 07:30 but Haas says this is wrong) Observed by Haas (New Mexico?, USA, 12" reflector?) Bright spot on S. rim had I=5.8 on this date but 8.9 on Aug. 17, when observing conditions were similar (see # 473). NASA catalog weight=4. NASA catalog ID #470. ALPO/BAA weight=3.
The area west of Helicon not visible despite the area being fairly bright at Full Moon time. This area was a very bright patch one night. Cameron notes: comensurability of Full Moon & Perigee. Cameron 2006 catalog extension ID=64 and weight=3. Seeing=7 and transparency=4. 2.4" refractor used. ALPO/BAA weight=1.
Aristarchus 1989 Oct 13 UTC 21:00 Observed by Cook (Frimley, Surrey, UK, 20cm reflector (visual and video)) "Aristarchus had what appeared to be a outline of a ghost crater on it's eastern side - quite large and bright". Cameron 2006 extended catalog TLP ID No=378 and weight=5. ALPO/BAA weight=4.
Plato 1937 Jul 22 UT 06:20 Observed by Haas (Alliance, Ohio, USA, 12" reflector?) "Floor distinctly greenish, but was gray on June 23, 1937 at 0430 & col.84 (normal?)" NASA catalog weight=4 (high). NASA catalog ID #421. ALPO/BAA weight=3.
On 1982 Jun 05 at 22:00? UT, Chapman (UK, using a 12" reflector), again using a x2 yellow filter, noticed that the central craterlet detectabilty changed such that sometimes it was visible and sometimes not. Foley (Kent, UK)noticed that the central craterlet could only just be seen between June 2 to June 5 and was much less discernable than during the previous lunation. No CED brightness measurements made. The floor of Plato was noted to be very dark though. Cameron 2006 catalog ID=172 and weight=4. ALPO/BAA weight=2.
Aristarchus 1965 May 15 UTC 01:40-02:15 Observed by Weresuik, McClench, Johnson (Pt. Tobacco, MD, USA, 16" reflector x240, S=F, T=G) and Delano (Massachusetts, USA, 12" reflector). "Crater had color(red?) detected by Trident MB & photos were obtained. There were pulsations. Delano saw E. wall of crater unusually bright (confirm. if at same time)." NASA catalog weight=5 (very good). NASA catalog ID #876.
Aristarchus, Cobra Head, 1969 Dec 23 UT 05:19-05:34 Observed by A.R. Taylor (Buckinghamshire, UK, 8.5" reflector, 240x, Wratten 25 and 80B) Strong blink in crater at 0519. All traces gone by 0534. Could only see in filters, Plato, Copernicus, Gassendi all normal. Obscur. also in Cob. Head." NASA catalog weight=4. NASA catalog ID #1230. ALPO/BAA weight=3.
Eratosthenes 1976 Sep 08 UTC 04:29 Observed by Bartlett (Baltimore, MD, USA, 4.5" reflector 45-225x, S=5-4, T=5) "Psuedo-shadow X3 was present but X disappeared from wall(same intensity?) which was rated 4 deg. Disappearance of X so unexpected that he examined inner S wall very carefully & was certain it was free from psuedo-shad. Had vanished within 24h. Other pseudo-shadows showed no change. X reappeared next nite. (X must have been 4deg; &this is much higher than any other meas.). Variability of wall shadows may habe been what Pickering saw, suggests Bartlett." Cameron 1978 TLP catalog weight=4 and catalog ID 1452. ALPO/BAA weight=2.
Archimedes 1940 Aug 18 UT 03:25 Observed by Haas (NM?, USA, 12" reflector?) NE outer wall had I=5.0, but was I=2.5 on June 20 (see #467) (similar colong.)" NASA catalog weight=4. NASA catalog ID #471. ALPO/BAA weight=2.
Archimedes 1940 Jun 20 UT 07:30 Observed by Haas (NM, USA, 12?" reflector) "NE wall (outer) had I=2.5 on this nite but 5.0 on Aug. 18 (see #471 -- both same phase so real diff. 2.5 normal?)" NASA weight=4. NASA ID No. #467. ALPO/BAA weight=2.
Near Censorinus 1964 Apr 26 UT 20:00? Observed by Hopmann (Czchoslovakia?) "Surface brightening somewhat similar to Kopal and Rackham in #779" NASA catalog weight=3 (average). NASA catalog ID #810.
Proclus 1972 Nov 20 UT 20:20 Observed by Farrant (Cambridge, England, 8.5" reflector, x178) "Dark patch in crater. Disappeared by next nite. The normal ring seemed thickened. On Dec. 7. the crater appeared bright. Drawings. (prob. real LTP, nr. FM)" NASA catalog weight=3 (average). NASA catalog ID #1350.
Lichtenberg 1951 Jan 22 18:19.2-18:38.5 UT observed by Baum (Chester, England). Tiny red spot noticed initially and then faded. Location of spot 31.403N 66.167W. 20cm refractor x90- x100. Seeing fair-extremely good. NASA catalog assigns a weight of 3. NASA TLP ID No. #542. ALPO/BAA weight=3.
Gassendi 1966 Dec 27 UTC 06:30-07:05 Observed by Kelsey (Riverside, CA, USA, 6" reflector?) "Very faint blink on SW (ast. ?) floor & on another N. of it on NW floor. Obs. considers obs. very suspect" NASA catalog weight=1 (very poor). NASA catalog ID #1006.
On 1989 Oct 14 UT 19:00?, 22:00? P.W. Foley (Kent, U.K., using a 12" reflector) noted that although the brightness of Aristarchus crater seemed steady, that there was just too much detil to see inside the crater than one would expect. Appeared as two craters - Cameron commented that this was often seen by Bartlett. Several observers apparently confirmed this TLP? Cameron 1978 catalog extension ID=379 and weight=5. ALPO/BAA weight=2.
Aristarchus 1954 Oct 12 UT 00:55-02:10 Observed by Bartlett (Baltimore, MD, USA, 3.5" refractor x100, S=5-6, T=5) "Pale violet radiance on S.wall SE, E, NE walls, & c.p. At 0409 strong violet tint E 1/2 of fl.very faint on W. 1/2 of floor & W. wall. Dark violet on nimbus & pale violet on Mt. m" NASA catalog weight=4. NASA catalog ID #576. ALPO/BAA weight=2.
Plato 1878 Nov 09 UTC 21:00 UTC Observed by Klein (Cologne, Germany, 6" refractor?) "Faint, but unmistakable white cloud not seen before." NASA catalog weight=4. NASA catalog ID #207.
Aristarchus 1973 Feb 15 UTC 17:07-19:31 Observed by Theiss (located at 51N 5.67E) "area 4-5 diameters of Aristarchus were coloured clearly yellow-red" 120mm reflector used. Ref Hilbrecht & Kuveler (1984) Moon and Planets Vol 30 p53-61. ALPO/BAA weight=1.
Plato 1973 Aug 13 UT 22:25-22:35 observed by Pedler (Devon, UK). Observer noticed a slight blink on a lighter patch on the floor just beneath the south(?) rim using Moon blink filters. ALPO/BAA weight=1.
David Darling observed bright glittering on Aristarchus. This was followed by a flare up in brightness at 00:38:05 UT in the comet-like ray area of the crater equivalent in intensity to the central peak. Then he saw another one on the north east rim of Aristarchus of the same brightness. A third flare was seen at 00:49UT in south of Herodotus, on the comet-like ray. Another two flares were observed at 00:56UT on the north west rim of Aristarchus. Darling suspects that these effects were due to seeing effects and Cameron agrees. However Weier suspects that they were TLP? Brightness measurements by Weier were for the south west rim of Herodotus 8.0, for a spot at the Cobra's Head 9.0 and 7.5 for C.H. Cameron apparently did not see the flashes but did suspect that the interior of Aristarchus was a bit unusual. Don Spain did not see anything unsual at all. Cameron 2006 extended catalog ID=380 and the observation weight=3. The ALPO/BAA weight=2.
Aristarchus 1967 Dec 16 UTC 22:00? Observed by Farrant (Cambridge, England, 8" reflector) "Crater took on an unusual appearance on inner NE (ast. ?) wall. Showed a very pale blue & the opposite wall a pale red color seen in no other features. Lasted only 10m & survived a change of eyepieces." Seeing=I (Antoniadi). NASA catalof weight=3 (average). NASA catalog ID #1056.
On 1978 Aug 18 at UT 22:00 Coates (England?, UK, 3" refractor, seeing=II) found that the inner bands of Aristarchus were hard to see, this was odd because the seeing conditions were good and he usually sees them? However he did not believe that there was any obscuration going on. The Cameron 2006 catalog ID=37 and weight=0. The ALPO/BAA weight=1.
On 2002 Mar 29 at 02:20-02:38UT C. Brook (Plymouth, UK, 60mm refractor, x120 - no cloud, slight haze, no wind, seeing good) noticed during first part of observing period that Aristarchus was getting steadily brighter, very much brighter than Proclus. This continued until 02:36UT when it dimmed suddenly over a period of about a minute or so. No colour effects seen. ALPO/BAA weight=2.
On 2002 mar 29 at 02:20-02:38UT C. Brook (Plymouth, UK, 60mm refractor, x120 - no cloud, slight haze, no wind, seeing good) noticed during first part of observing period that Aristarchus was getting steadily brighter, very much brighter than Proclus. This continued until 02:36UT when it dimmed suddenly over a period of about a minute or so. No colour effects seen. ALPO/BAA weight=2. Just as an after thought - was it Aristarchus that was varying, or Proclus?
Louderback, of South Bend, WA, USA observed a bright area over Mons Anguis and Eimmart - it resembled a comet and had a bluish colour and varied in brightness. The colour was confirmed as it was not seen in a red filter but could be seen in blue and white light. Other features were checked but did not show anything similar although a violet glare was suspected in the blue filter. A sketch was made. Observer made Eimmart 8 in brightness at 07:30UT. Noted that the area around Eimmart appeared opaque at times and less so at other times. At 08:52UT the phenomenon was seen again. On May 2nd a bright spot was still seen in the region but it was not changing dimensions. During the observation on Apr 30th the atmospheric transparency was excellent. A 2.5" refractor was used. Reference: Personal communication from Louderback to Cameron on 1980 Jul 16th. The Cameron 2006 catalog extension ID of this TLP was 93 and the weight was 4. ALPO/BAA weight=3.
Aristarchus 1976 Aug 11 06:44 Observed by Bartlett (Baltimore, MD, USA, 4.5" reflector, 45-300x, S=4-3, T=4) "Pale viol. radiance (gas?) on plateau m. Dark viol. tinge on nimbus. C.p.=10 deg walls=8deg, & all of floor=8 deg. W.wall out of focus due to haziness (gas?)." NASA catalog weight=4 (high). NASA catalog ID #1441.
On 1983 Jan 29/30 at UT20:35-01:00 Sykes (UK?) observed that Linne appeared to brighten for approximately 20 min and had the appearance of a point (confirmed). This observation was made during a major Torricelli B TLP. The Cameron 2006 catalog ID=198 and the weight=5. The ALPO/BAA weight=2.
Torricelli B 1983 Jan 29/30 UTC 20:35-02:30 Observed by Foley (12" reflector, seeing Antoniadi II, Transparency=good, no spurious colour seen), Moberley (14" reflector, seeing Antoniadi II, transparency excellent, spurious colour strong), Cook, J & M (12" reflector, seeing Antoniadi II-III, transparency moderate). All observers based in southern England. "Initially crater brightest feature on the Moon, then it faded. Strong colour also seen by all observers e.g. green-blue to violet. Report of observations written up in JBAA Vol 100, No. 3, p117 123, (2000) - probably one of the best reorted TLP". The Cameron 2006 catalog ID=198 and weight=5. The ALPO/BAA weight=5.
On 1984 Feb 17 at 19:45-22:20UT P. Madej noticed colour in Aristarchus and telephoned the BAA Lunar Secton TLP network. Mosely at 21:15UT observed that Aristarchus was both bright and fuzzy - there was some spurios color (red on south and blue on the north) but this was replaced by violet. By 21:30UT (transparency=fair) the centre of the crater was bluish and the west wall creamy white. the north and south walls were brilliant white. By 22:00-22:30 UT the seeing had improved and the crater looked unusual - now the centre was violet and the west wall duller, off-white. By 05:35UT the crater was difficult to define according to Cook - 4 bands could be seen under II seeing and the north rim was fuzzy and less bright than the east wall (this was hazy). P. Moore observed that the crater was normal at 04:00UT. Cameron 2006 catalog extension ID=242 and weight=3. ALPO/BAA weight=2.
On 1984 Feb 17 at 19:45-22:20UT P. Madej (England, seeing=III- IV, x50)noticed that the crater Reinhold had a blood red spot on the northern terraces, at the base of the inner wall in a summit crater on the last of a crater chain or ridge descending from the top to floor". Cameron 2006 catalog extension ID=242 and weight=3. ALPO/BAA weight=3.
On 1983 Jan 29 at UT22:09 M.Mobberley (Sulfolk, UK, 14" reflector) noted that Arago B had a slight tinge of violet colour, and was a lot less (bright?) than Torricelli B's blueness. Other craters checked but were not showing any blue colour. The Cameron 2006 catalog ID=198 and weight=5. The ALPO/BAA weight=3.
On 1983 Jan 29 at UT22:09 M. Mobberley (Suffolk, UK), found that Moltke crater was "exceptionally bright". Other craters (apart from Arago B Torricelli B etc) appeared normal. The Cameron 2006 catalog ID=198 and the weight=5. The ALPO/BAA weight=2.
Proclus 1972 Nov 21 UT 21:30 Observed by Farrant (Cambridge, England, 8.5" reflector, x130) "Thickened bright ring remained, but the dark patch had disappeared. (dark patch prob. real temporary phenom. as it was seen nr. FM when contrasts are strongest, yet disappeared" NASA catalog weight=1 (very low). NASA catalog ID #1351.
CCD images taken through Wratten 25 (red+near IR) and 87 (near IR only) filters. Between 00:02 and 00:25UT there was some slight evidence that a fade may have taken place however careful analysis by Cook casts doubt on this. Probably it was more related to a degradation in image quality due to seeing than a true TLP. An ALPO/BAA weight of 1 has been assigned.
Aristarchus 1973 Oct 12 UTC 18:13-18:45 observed by Pasternak "Bright region of the S. of the crater, color was red." - Hilbrecht and Kuveler, Earth, Moon & Planets, 30 (1984), p53-61. ALPO/BAA weight=1.
On 1978 Apr 23 at UT20:35 (Rawlings, UK, finderscope, x50) observed a bright flash (~0.3 sec duration) near to Copernicus (20W, 9N) with rays to the south east whilst he looked through a finder scope. Moore, who studied the drawing, suggests that the area of the flash was near Copernicus. However Cameron says this cannot be the case if the flash was in darkness as mentioned in the BAA Lunar Section circular. She comments that it might have been a meteor? The Cameron 2005 catalog ID=28 and weight=1. The ALPO/BAA weight=1.
On 1970 Nov 14 UT20:10 J.Coates (Burnley Astromical Society, 8.5" reflector, x102 and x204) saw a dirty green colour on the NW region of the crater, in patches, with a green area nearby. ALPO/BAA weight=1.
Proclus 1955 Nov 01 UTC 02:50-03:05 Observed by Bartlett (Baltimore, MD, USA, 3.5" reflector x100, S=6, T=5) "Proc. D normally 5 deg bright was vis. tonite only in blue light, whereas usually is vis. in integrated light. However at col. 110.5 deg it was a dark spot (see # 816) C.p. tonite was normal 5 deg bright but in Oct. lun. was dark". NASA catalog weight=4 (good). NASA catalog ID #625. Note Proclus D does not refer to the crater Proclus D as defined by the IAU, but probably to a spot inside the crater that Bartlett designated D!
Aristarchus 1962 May 20 UTC 08:00? Observed by Wildey, Pohn (Mt Wilson, CA ?, 60" reflector? Photometer) "Reddish color in Aris. 0.88 magnitudes brighter than normal (photometry)." NASA catalog weight=5 (very good). NASA catalog ID #758. ALPO/BAA weight=3.
Bullialdus 1962 May 20 UTC 08:00? Observed by Wildey, Pohn (Mt Wilson, CA ?, 60" reflector? Photometer) "1.05 magnitudes brighter than normal (photometry)." NASA catalog weight=5 (very good). NASA catalog ID #758. ALPO/BAA weight=2.
Kepler 1962 May 20 UTC 08:00? Observed by Wildey, Pohn (Mt Wilson, CA ?, 60" reflector? Photometer) "1.03 magnitudes brighter than normal (photometry)." NASA catalog weight=5 (very good). NASA catalog ID #758.
Enhancement of spectrum in UV and CaI recorded on photoelectric spectrometer scans by Grainger and Ring in Italy. Effect seen on Aristarchus. Cameron 1978 catalog ID=740 and weight=5. ALPO/BAA weight=5.
1969Jan04 UT19:30-20:00 W.Deane (Hendon, UK, 2" refractor) observed a bright yellow spot just E of Aristarchus, stretching from the S. end of Montes Harbinger to the S. wall of Prinz. The ALPO/BAA weight=1. ALPO/BAA weight=1.
On 1984 Feb 18 at 05:35UT Moseley (Coventry, UK, 6" reflector, x120, seeing II-III, transparency very poor to good) found that the crater was difficult to define. However observing conditions variable. P. Moore observed that the crater was normal at 04:00UT. Moseley found the crater well defined later. Cameron 2006 catalog extension ID=242 and weight=3. ALPO/BAA weight=1.
On 1992 Jul 16 at UT 03:32-09:31 D. Louderback (South Bend, WA, USA, 3" refractor, x134) detected yellow on the southern rim of Aristarchus, and the colour looked "darker" through a yellow filter and the region was "duller" than normal. The region was 1 intesnsity step brighter on the 2nd measurement, "on all points in it". The comet tail-like ray had 3 sections and was "mottled" in appearance. Finally the Cobra Head region had possible variations in brightness. The cameron 2006 catalog ID=451 and the weight=3. The ALPO/BAA weight=2.
On 1983 Jan 30 at UT 23:45 Chapman (England, UK) observed that Censorinus was low in brightness. The Cameron 2006 catalog ID=199 and the weight=4. The ALPO/BAA weight=2.
On 1983 Jan 30 at UT 23:45 P.W. Foley (Kent, UK, 12" reflector) measured that the brightness of the region around Toricelli B was 2.3 (high) and there was a slight blue colour. The Cameron 2006 catalog ID= 199 and the weight=4. The ALPO/BAA weight=2.
Gassendi 1940 Aug 20 UT 03:25 Observed by Haas (NM?, USA, 12" reflector?) "Largest bright spot on SE pt. of floor had I=8.6 (real changes? see @ '#649, 474, & 475, all similar change)." NASA catalog weight=4. NASA catalog ID #472. ALPO/BAA weight=2.
Aristarchus 1976 Aug 12 UT 07:30 Observed by Bartlett (Baltimore, MD, USA, 4.5" reflector 45-225x, S=6=3, T=5) "Nimbus around c.p.=2deg, S.floor=6deg & was red; rest of floor=8deg. This is only tint in Aris.). Tonite saw a pale red glow suffasing the S. region of the crater. Bright blue radiance (gas?) on ENE wall. Viol. radiance on plateau m gone tonite. Red glow on 13th & the region was yellow- brown." NASA catalog weight=4 (high). NASA catalog ID #1442.
In 1941 Jul 11 at UT 04:00? Haas (New Mexico?, USA, 12" reflector) observed near Hansteen "Moving luminous speck, estimated 0.1" diam., mag 8 (rept. date was 10. Lunar meteor?". The Cameron 1978 catalog ID= 487 and weight=3. The ALPO/BAA weight=2.
On 1986 Feb 26 at 05:00UT a photograph was obtained by T. Kohman of Pittsburgh, PA, USA (3.5" Questar and 0.25 sec exposure) that had two bands above the limb, resembling ejecta plumes. Cameron suspects that these are probably flare from the eyepiece optics. Cameron 2006 extension catalog ID=282 and weight=0. ALPO/BAA weight=1.
Plato 1870 Apr 17 UT 22:00? Observed by Gledhill? (Halifax, England, 9" refractor) "Group 1 again in illum. as in Aug., Sep. 1869 observations." NASA catalog weight=2 (low). NASA catalog ID #166.
Gassendi 1967 Jan 28 UT 00:04-01:06 Observed by Moseley (Armagh, Northern Ireland, 10" refractor, x350, Seeing=Good) "Small moon blink (Eng.) not quite concentric with the crater, half way from c.p. to SE (IAU?) wall. Lasted till 0007h then clouds. Seen again at 0100h-0106h, then lost with poor seeing. Looked again at 0148, 0230, 0310, but neg. Other areas also neg." NASA catalog weight=4 (high). NASA catalog ID # 1013.
Plato 1870 Feb 18 UTC 00:00? Observed by Gledhill (Halifax, England, 9" refractor) "Illum. of another group of craters different from group in Aug. & Sep. obs. (date is F18 if phase is similar to Ap 1870) NASA catalog weight=2 (low). NASA catalog ID #164.
Aristarchus 1969 Dec 26 UT 03:35-03:45 Observed by Kilburn (England, 6" x192) "Suspected faint blink & glow outside of SW(IAU?) wall. Large area was gray toward Herod. Another blink inside between 2 bands at0330h. At 0345h neither blinks seen. Blink seen in blue (=red event?). Next nite crater was normal." NASA catalog weight=3 (average). NASA catalog ID #1231.
Plato 1938 Jun 15 UTC 08:00 Observed by Haas? (New Mexico?, 12?" reflector) "NW. end of floor had intensity I=2.0, but on 7/15/38, I= 3.7, conditions similar." NASA catalog weight=4 (high). NASA catalog ID #439.
Plato 1971 Dec 04 UT21:00-21:10 D.B.Taylor (Dundee, UK, 10" refractor, conditions poor and turbulent). Observer suspected colour orange colour near bright spot on north wall. Observation ceased due to being clouded out. ALPO/BAA weight=1.
Aristarchus 1968 Dec 07 UT 07:00? observed by Corralitos Observatory (Organ Pass, NM, USA, 24" reflector+Moon Blink) "Bluing around 3 craters, strongest at Aris. Lasted several days. Photos show 30% more intensity in blue filter than in red or neutral. Moon's declination northerly. Obs. think it was due to atm. effects" NASA catalog weight=5 (very high). NASA catalog ID #1105.
On 1968 Dec 07 at UT 07:00? Corralitos Observatory (Organ Pass, NM, USA, 24" reflector and Moon Blink device) observed a bluing around three craters, one of which was Kepler. This effect lasted several days. Photographs were taken that show30% more intensity in the blue filter than in red or neutral. The Moon's decination was northerly. The observers suspect that it was an atmospheric efect and not a TLP. The Cameron 1978 catalog ID=1105 and the weight=5. The ALPO/BAA weight=3.
On 1990 Jan 13 at UT 22:15-23:05 J. Pedler (Bristol, UK, seeing=III and transparency=excellent, no spurious colour) detected a blue region on the north of Aristarchus, varying in sharpness/diffuseness. The crater rim in this region could not be descerned. Eleswhere the crater rim was normal as too were other features. When a Moon blink device was used, no colour blink was detected, however through the blue filter the suspected area was bright and the crater rim indistinct. Whereas through the red filter the area looked perfectly normal. At 22:30UT the effect had vanished and everywhere was normal. The Cameron 2006 catalog ID=388 and the weight=5. The ALPO/BAA weight=3.
On 1985 Dec 29th at UT 23:23-23:58, M. Mobberley (Bury St. Edmunds, Suffolk, UK, seeing II-III) made a video scan of the Moon. P.W. Foley examined the tape and noted something that Mobberley had not seen visually. Two scans of Totticelli B had taken place, one at 23:23 and the other at 23:58UT. In the first a brilliant point appeared briefly, on the western rim, positioned at 3o'clock. In the second video sequence this brilliant spot was present continuously and wandered along the rim. It was possible to monitor frequency of turbulence present, this apparent movement did not ppear to conform, although judgement here was extremelydifficult as the feature was at absolute point of resolution, a little better than 0.5 mile. Also considered was the implication of the equipment effect, this did not seem to fit either as other nerby craters in the same configuration, 30% shadow filled with sunlight on exterior of western walls. A point to watch for in future. ALPO/BAA weight=3.
Area of darkness overlapping NW rim. It was visible through this area of obscuration. Sketch. Cameron 2006 extended catalog ID=376 and Cameron weight=3. ALPO/BAA weight=2.
Janssen K 1992 Sep 14 UTC 21:30-0025 Observed by Brook (Plymouth, UK, 4" reflector, Antoniadi II seeing). "Crater > & similar one was sharp EW wall especially bright. Floor in shadow. No obscuration on floor but no detail in bright part could be seen. At 23:20 had dimmed slightly, continued to do so. At 00:40 was noticeably < Began to see detail 00:25, TLP over. G. North (Herstmonceux, 18" reflector) took photos in this time K was grayish, not very bright. C. Brook noticed K very bright condition its rays 1/2 length. L. Harris (UK, 10" Reflector with CCD camera). Cameron 2006 catalog ID=453 and weight=5.
Messier & A 1972 Aug 27 UT 08:51-09:21 Observed by Hansen (LeMoore, CA, USA, 6" reflector, x200) "Perculiar thread of shadow connecting the 2 craters. Sun's elev. @ 6deg. Drawing (possibly a high peak on E.wall of A casting a shadow?)" NASA catalog weight=1 (very low). NASA catalog ID #1342.
In 1897 Oct 14 at UT 00"50 Pickering (Cambridge, Mass. USA, 15" refractor?) observed "Refractive displacement of lunar atm. at bright limb was 0.4" (time is for occultation of Alctone in Pleiades)" The Cameron 1978 catalog ID=294 and the weight=3. The ALPO/BAA weight=1. Note this may? refer to an occultation, in which case it will be pointless to observe again for a particular illumination.
On 1944 Mar 12 at UT 23:00 H.P. Wilkins (Kent, UK, 8.5" reflector) observed that Plato appeared incomplete - the central crater had it's north wall obscured. cameron comments that maybe this was due to the low altitude of the Moon? The Cameron 1978 catalog ID=491 and the weight=4. The ALPO/BAA weight=2.
Grimaldi 1937 Sep 23 UT 05:00 Observed by Firsoff (Glastonbury, England, 6" reflector + filter) "Variations in green. Strong green on this date. Other dates of variation are: Date Time Color 4/29/37 0930 slight 3/23/38 09?30 strong 7/24/38 0830 gray-green NASA catalog weight=4 (high). NASA catalog ID #424.
Birt 1972 Sep 25 UT 23:20-23:45 Observed by Doherty (Stoke-on-Trent, England, 10" reflector x280, S=VG) "All bright areas were similar in intensity (albedo) but 2 larger ones at times seemed brighter. N & S. The E. IAU? wall of the small craterlet showed most prominently & at times suspected a faint pt. of light just W. of its center. This was very suspect however." NASA catalog weight=1 (very low). NASA catalog ID #1345.
Darling, alerted by Keyes saw Aris >> brighter obj on moon (as it normally is) Comet ray & N rim of Herod. >> could see no detail - Aris. except two bands, moon was pale yellow (low alt.) with halo around it. Nothing unusual elsewhere. Cameron 2006 catalog extension ID #384 and weight=0. ALPO/BAA weight=1, just in case there is some merit in this report?
Near Bacon, Barocius, Nicolai i.e. 16E-25E, 52S-42S 1878 Nov 13 UTC 02:30 Observed by Hammes & others (Oskaloose, Iowa, USA, 6.5" reflector) "Lunar volcano (drawing) (investigation & correspondence cast doubt on location)" NASA catalog weight=? NASA catalog ID #208.