Observed by Dachille & daughter (Univ. Park, Pennsylvania, 10.5" reflector, x75) "Flash -- then a brownish - red color patch. Alt. @ 20deg. (MBMW has Oct. 12, but is 13th UT)". NASA catalog weight=5 (very good). NASA catalog ID #674.
Kepler 1966 DEc 04 UTC 05:10 Observed by de Beraud (Flossmoore, Ilinois, USA, 6" reflector, x360, S=G) "Saw a bright area thru. blue filter but could not see it in red filter. Decided it was a bluish phenomenon." NASA catalog weight=3 (average). NASA catalog ID #1001.
On 1983 Jan 05 at UT22:00 P. Madej (Huddersfield, UK) noticed some colour on Aristarchus. The Cameron 2006 catalog ID=195 and the weight= 2. The ALPO/BAA weight=1.
Native American's account of a star that appeared below the body of the Moon, within the horns of it? Seen from Boston, MA, USA? Cameron's 1978 catalog gives this a weight of 5 and has a TLP ID No. of 9. The ALPO/BAA catalog gives this a weight of 1.
On 1913 Mar 20 at UT 19:00? Franks saw the south horn of the Moon to be prolonged along the Leibnitz Mountains as a feeble line of light well into the dark side. The Cameron 1978 catalog ID=335 and the weight=1. The ALPO/BAA weight=1.
On 2002 Feb 26th at 18:41:25 UT Michael Hather saw, on the limits of vision, a brief magnitude 7 white flash about 300 km north west of Aristarchus, in Earthshine. He was using a 120 mm refractor. No other observers were observing at this time.
On 2003 May 05 at UT 19:12:50 and 19:17:45 R. Lena (Italy) saw faint flashes (possible optical illusions) at these times in Mare Vaporum in Earthshine. The ALPO/BAA weight=1.
On 2003 May 05 at UT 19:50 P.G. Salimbeni (Italy) saw a faint flash (possible optical illusion) near to Pallas in Earthshine. The ALPO/BAA weight=1.
Macrobius 1938 Jun 02 UTC 18:00? Observed by McLeod (England? 5" ? reflector) "Changes in dark areas. (near Proclus where Green saw phenomenom. see #443)" NASA catalog weight=2 (low). NASA catalog ID # 444.
On 1966 Apr 24 at 21:30UT R.Livsey (Scotland, 6" reflector at x275) observed that Aristarchus was "fluorescent" in Earthshine. It is uncertain whether the description of "fluorescent" should be involve this observation being categorized as a TLP, however just for safety it will be assigned an ALPO/BAA weight=1. This was a BAA Lunar Section report.
On 1987 Mar 04 at UT 19:03-19:47 H. Miles (Cornwall, UK, 5" refractor, x30, S=clear) found at 19:03 that Aristarchus was exceptionally bright (even without blocking out the sunlit side of the Moon), being the most easily seen crater on the Moon, and this was despite the sky not yet being dark. The crater had faded by 19:20UT and at 19:47UT Earthshine was no longer visible. CED brightness measurements were made and were less than usual and the inside of the crater may have had a blue/gray colour (unclear from the Cameron 2006 catalog description). The Cameron 2006 catalog ID=299 and the weight=2. The ALPO/BAA weight=2.
Nebulous appearance. Cameron 1978 catalog assigns an ID No. of 12 and a weight of 1. ALPO/BAA catalog assigns a weight of 1.
On 1867 Apr 09 at UT 19:30-21:00 Elger(Liverpool? UK, 4"? aperture telescope) observed that Aristarchus was shining like a 7th magnitude star-like point, becoming fainter, almost extinguished at 9PM. He had seen lights before but never so strong. The Cameron 1978 catalog ID=151 and he weight=4. The ALPO/BAA weight=2.
On 1983 May 17 at UT20:13-20:40 P. Madej (Huddersfield, UK, x38 and x63) found that Aristarchus was normal in appearance, but at 20:19 a blood red disk was seen as bright as a 6th magnitude star. The colour did not vary but the brightness changed from 4 to 8 over a 1.5-3min period, on the south west wall. 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=3.
On 1981 Jun 08 at UT01:48-02:45 B. Hobdell (St Petersberg, FL, USA, 10 and 4" reflectors) could hardly see Aristarchus crater, however at 01:48UT it brightened in blue for about 3 minutes. Then at 02:20UT there was a bright flash, and by 02:25UT the crater was very bright, but by 02:45UT it was no longer visible. Cameron 2006 catalog ID=144 and weight=0. The ALPO/BAA weight=1.
Theophilus 1964 May 18 UT 01:05-01:15 Observed by Dieke (Baltimore, MD, USA, 6" refractor, x125) "Crescent of crsimson color on SW between rim & flor. Was not present at 0500, nor did it reappear from 0115 to 0245h" NASA catalog weight=3. ALPO/BAA weight=3. NASA catalog ID #812.
On 25 Jun 1993 at UT 23:30-23:52 Carlos Colesanti (Mairinque, Brazil) obtained two CCD images of Julius Caesar crater and noticed a brilliant fuzzy area on the rim of the crater. This appeared in both images and resembled a fuzzy white blob. Note that this is a REA-Brazil observation. ALPO/BAA weight=1. Cameron (2006) ID=463.
Near Ross D (23E, 12N) 1964 May 18 UT 03:54-04:53 Observed by Harris, Cross et al. (Whittler, CA, USA, 19" relector x720, 8" reflector x322, S=G) "White gas obscuration. Moved 20mph, decreased in extent. Phenom. repeated. Drawing." NASA catalog weight=5. NASA catalog ID 811. ALPO/BAA weight=4.
White spot near Censorinus 1966 Dec 18 UT 23:40-23:46 Observed by Enie (Pittsburgh, Pennsylvania, USA, 8" reflector x100, S=G) "Attention drawn to pink color in this usually white patch. Brightened to a light reddish tinge for 2 mins, then faded back to pink, then to white, Sketch." NASA catalog weight=4 (high). NASA catalog ID #1002.
Linne 1867 Aug 06 UT 21:00? Observed by Buckingham (England?) "Crater in darkness, he saw a "rising oval spot". Other obs. saw it as a triang. Bold black spot pointing to earth, slowly diffused white & drift of white on slope of pyramid. (indep. confirmation?)" NASA catalog weight=5 and catalog ID #155. ALPO/BAA weight=2.
Limb North? 1881 Jul 04 UT 00:30 Observed by Several observers (Lebanon, CT, USA, naked eye, alt @ 10 deg) "2 pyramidal protruberances on upper limb (dark?). Points were darker than rest of moon's face then slowly faded away (atm ? moon very low)" NASA catalog weight=? NASA catalog ID #223.
Mare Crisium 1989 Jan 14 UTC 19:15 Observed by Hedley-Robinson (Devon, UK, 5" Coude, Antoniadi II seeing, x150) "Floor blinks indicating colour - used a Moon blink device". 2 areas of the floor were affected, The first one was on the far west of Mare Crisium, next to Proclus crater. The second area was in the NNW, but outside the edge of the mare. Other features elsewhere checked but gave no colour reaction. Peters (UK) though did detect colour elsewhere, but his seeing was III- IV. The Cameron 2006 catalog ID=344 and the weight=5. The ALPO/BAA weight=3.
1987 Feb 06 UTC 02:35 Observed by Darling (Sun Praire, Wisconsin, USA, 12.5" Newtonian x342) "I was using a 12.5 f5 Newtonian reflector with a 9mm eyepiece and 2x Barlow with no filters. I had been observing other features on the Moon when I had panned to the area where the sunrise was taking place on Mount Piton. The mountain peak looked like a shimmering block of ice with a phosphorescence luminescence cloud around the peak. What was really interesting was the shaft of light streaming across the Lunar Maria that appeared like a cone and it came to a point near Mount Piton. The Mountain had the appearance of mother of pearl and the luster or glow that surround the peak only lasted about 20 minutes." The Cameron 2006 catalog ID=296 and gthe weight=4. the ALPO/BAA weight=3.
Lubbock 1973 Nov 02 UT 22:10-23:59 Observed by R.Hill (Greensboro, N. Carolina, USA) "Color in crater changed fro. gray to brownish -- strong enough change to be noted. Never saw anything like this 7 yrs. of observing". NASA catalog weight=3. NASA catalog ID #1379. ALPO/BAA weight=3.
On 1978 May 14 at UT21:30-22:52 P.W. Foley (Kent, UK, 12" reflector, seeing II and transparency excellent, no spurious colour) observed Aristarchus to be very bright in Earthshine and bluish. The CED brightness measuring device gave a very bright reading of 0.9, the brightest he had ever seen ir before was 0.3. Cameron 2006 catalog ID= 29 and weight=3. ALPO/BAA weight=2.
On 1867 Apr 12 at UT 19:30-21:00 Elger (Liverpool? UK, 4" aperture telescope) observed Aristarchus in Earthshine "grew fainter 7th mag. star; much fainter in last 15 min. & barely perceptible at 9PM. Had seen something similar on former occ." The Cameron 1978 catalog ID=152 and the weight=4. The ALPO/BAA weight=2.
In 1878 Oct 04 at UT 20:00 an Unknown observer noted that Hyginus Nova could not be seen, whereas the night before the crater had the most conspicuous of all appearances. The Cameron 1978 catalog ID=201 and weight=3. The ALPO/BAA weight=2.
Williams of the UK, on 1882 Sep 20 at Moon's age 8.4 days, noticed a spot that had been seen on the 21st and 23rd of the same year with abnormal brightness. The spot was near Picard. Williams comments the spot was "nearly as large but a little fainter than Picard, This observation was reported in the Astronomical Register of the Royal Astronomical Society and is not included in the Cameron catalogs. It is one of many measurements of the brightness of this spot for different illumination angles and is one of three outlying brightness points spotted on a graph by Willaims. The ALPO/BAA weight=3.
Plato 1964 May 20 UT 01:00-01:30 Observed by Bartlett (Baltimore, MD, USA, 2.4" refractor x117, S=6, T=5). "Orange-red color on W. wall. Vivid" NASA catalof weight=4 (high). NASA catalog ID #813.
Eratosthenes 1976 Jun 06 UT 02:01 Observed by Bartlett (Baltimore, MD, USA, 3" reflector x54-300, S=5, T=5) "Bowel was full of shadow but a small 5 deg bright spot on NE floor. Nothing seen in 1975 at nearly same col. but shadow was deeper." NASA catalog weight=4 (high). NASA catalog ID #1432.
On 1916 Sep 05 at UT 19:30 Markov (Russia) observed in Plato light on shadow of the bands at the bottom of the crater. The Cameron 1978 catalog ID=364 and weight=3. The ALPO/BAA weight=2.
Plato 1925 Jun 29 UT 20:00? Observed by Markov (Russia) "Light bands in bottom seen in shadow & did not seem to be elevations. These have been seen 5X from 1913-1922." NASA catalog weight=3. NASA catalog ID #391. ALPO/BAA weight=2.
Alphonsus 1966 Apr 28 UT 21:58 Observed by Smith (England, 10" reflector) and Corralitos Observatory (Organ Pass, NM, USA, 24" reflector+Moon Blink) "Reddish patches, (not confirmed at Corralitos with MB tho they give feature as Gassendi in their report)." NASA catalog weight=2. NASA catalog ID #930. ALPO/BAA weight=1.
Sulpicius Gallus M 2022 Dec 31 UT 17:00-18:00 F Taccogna (UAI - Italy) imaged this area and recorded this crater as extremely and unusually bright (compared to other features). A. Amorin (Brazil) observing a few hours later commented that the crater was brighter than it was in the Hatfield Atlas plates. However analysis of past imagery of this area under similar illumination (albeit with the crater on the edge of the image or at lower resolution) also shows a similar brilliance. One more image confirming this will be enought to remove it from a ALPO/BAA weight of 1.
On 1960 Aug? 01 at UT 22:00? an unknown observer detected that Vitello was illuminated -it should have been in shadow? Cameron says that if several days before sunrise then the date could have been July through to December, with August 1st most likely, and ancilary data is therefore given for this date. The Cameron 1978 catalog ID=729 and weight=1. The ALPO/BAA weight=1.
On 1989 Jan 16 at UT 20:00 G. North (Herstmonceux, UK, 30" reflector) observed Toricelli B to change in brightness and found colour in it. A 10 minute exposure spectrum was taken (Cameron does not have information on whether anything unusual was recoeded) before clouds obscured the Moon. Normally a 30 minute exposure would be needed. The Cameron 2006 catalog ID=345 and the weight=3. The ALPO/BAA weight=3.
2007 Oct 20 UT 17:31 A.Pink (Basinkstoke, UK) images a flash on the dark size of the Moon near to Vitello. The ALPO/BAA weight=1.
Plato 1979 Apr 06 UT 18:00-21:00 Observed by Crick (Belgium, seeing II- III) Part of floor darker than normal and obscuration on inner west wall - the effect did not change during the observation. Drawing made. Cameron 2006 catalog ID=49 and weight=3. ALPO-BAA weight=2.
On 1982 Mar 04 at UT 20:00 M.C. Cook (Frimley, UK) found Censorinus (4.6) to be brighter than Proclus (4.0) in white light. The Cameron 2006 catalog ID=164 and weight=4. The ALPO/BAA weight=1.
On 1982 Mar 04 at UT 20:00 M.C. Cook (Frimley, UK) found Proclus (4.0) to be fainter than Censorinus (4.6) in white light. The Cameron 2006 catalog ID=164 and weight=4. The ALPO/BAA weight=2.
Plato 1878 Oct 05 UT 21:40 Observed by Klein (Cologne, Germany, 6?" refractor) "Fog in W. part of crater. Faint shimmer like thin white cloud" NASA catalog weight=4. NASA catalog ID #203. ALPO/BAA weight=3.
Aristillus 1939 Sep 23 UT 01:00 Observed by Haas? (New Mexico?, USA, 12" reflector?) "Dark area in W. part of floor had I=1.3. comp with I= 1.3, 3.7, 4.0 in #450, 454, & 459, respectively. (albedos disagree at same phases, so are real anomalies). (normal here?)." NASA catalog weight=4 (high). NASA catalog ID #461.
On 1987 Mar 09 at UT20:00 M. Mobberley (Sussex, UK) obtained some video of Mons Pico - apparently these show the mountain with a puzzling appearance (not sure whether it was the observer who claimed this or some one who analyzed the tape). The Cameron 2006 catalog ID=300 and the weight=5. ALPO/BAA=1.
Alphonsus 1966 Apr 20 UT 22:28 Observed by Smith (Nottingham, England, 10" reflector) Reddish patch possibly detected on SE flank of central peaks, but more dubious than that from 28th Apr. ALPO/BAA weight=1.
On 1964 Jan 24 at 20:00? Scarfe (UK) obtained spactra showing luminescence? The Cameron 1978 catalog ID=796 and weight=5. The ALPO/BAA weight=3.
P. Moore at 21:10 found the southern wall (and ontothe southern floor) of the crater to be indistinct. Elsewhere in the crater everything was sharp. The effect was still seen at 21:42UT, but less strong. A check was made for colour with aq Moonblink device, but none was seen. There was still a trace of this effect at 21:44UT, although detail was now becoming visible. By 21:48UT vertical streaks were seen crossing the floor from the obscuration area and these were more visible in the red filter and not in the blue. Cameron comments that undefined patches on the floor of Plato are not normal. By 21:55UT some craterlets on the floor started to become visible and the TLP for Moore ended by UT22:23. P.Foley was alerted by Moore and saw a "amssive dense obsecuration on the south wall, south floor and south outer glacis to the Mare". Foley noted that by 21:50UT the effect was fading and finished by 22:03UT. Foley reported an orange translucent haze covering half of the floor, but floor craterlets could be seen on and off - however his atmospheric seeing conditions were IV. At 22:00 UT Foley reported the floor close to the north wall to be "milky or misty". No detail was visible at 21:15UT and variability in the floor continued until 23:10UT. Hedly-Robinson was aleted at 21:35UT and found no difference between red and blue views of the area, however he did find that the south rim was indistinct although this effect had lessened by 22:00 UT and was normal by 22:17UT. M. Mobberly saw a white spot on the floor at 21:20 UT, whereas he normally would have expected to see craterlets. Mobberly was alerted at 21:40 UT and took some colour photos. He also made sketches that showed variability in the floor and dark lines and patches in the north west corner. However the altitude of the Moon was low. Cameron mentions that two of the photos show loss of detail at the south wall and beyond.and also a change in the floor markings.The north wall at 21:50UT was strangely reddish (didn't think this was spurious colour). The rest of the wall was sharp at 22:20UT through a yellow filter. Large bright patch in the centre and rest of the floor was apparently of the same shading as Mare Imbrium. The above notes are based upon the Cameron 2006 catalog extension TLP ID 145 and weight=4. ALPO/BAA weight=2.
C. Brook of Plymouth UK, using a 4" refractor x216, noticed at UT 20:10 dark patches coming and going (in terms of visibility) on the floor of Plato. Occasional views of the central cratelet (seen as a white spot) were glimpsed. The dark patches seen lasted about 1-2 seconds before fading out during each visibility cycle. Teneriff Mountains were checked but no sign of seeing effects that might explain the dark floor patches. By 20:26UT the dark patch effect was fading and by 20:31UT floor detail was visible. Observations ceased at UT 20:34. Seeing conditions were II and the Moon was at a high altitude. Other observers were alerted but came on-line after the effect had finished. ALPO/BAA weight=2.
At approximately 18:43UT observer noticed that Censorinus, and its bright apron, appeared particularly brighter than normal. There was some spurious colour present - but just a redness along the southernmost extent of the apron visible; could not detect any blue along the northern edge however, he did do not suspect the colour to be anomalous. A re-examination at 18:51UT revealed that the crater had faded and was seen to fade visibly in real time to normal levels (over about a minute) by 18:53UT. Other features remained constant and so too did the apparent spurious colour.
Eratosthenes 1968 Nov 01 UT 01:50-02:06 Observed by Chilton (Hamilton, Canada, 12" reflector, 300x) "Red glow in the crater. Weak blink beyond ESE (IAU?) wall. Visually, area would not focus & gave impression of fog cascading down slope, but no motion was vis. (Moore has misprint in time in his cat. extension -- should be 0150-0206)." NASA catalog weight=3. NASA catalog ID 1106. ALPO/BAA weight=3.
Gassendi 1966 Apr 30 UT 21:30-23:28 Observed by Sartory, Ringsdore (England, 8.5" reflector, S=E), Moore, Moseley (Armagh, Northern Ireland, 10" refractor, S=VG), Coralitos Observatory (Organ Pass, NM, USA, 24" reflector, Moon Blink) "English moon blink system detected red spots with vis. confirm. Ringsdore says no color but saw obscuration. (LRL 60-in photos showed nothing unusual by my casual inspection). Indep. confirm. (even E. wall was in dark). Corralitos did not confirm by MB." N.B. event had finished by the time Corralitos came on-line. NASA catalog weight=5. NASA catalog ID #931. ALPO/BAA weight=4.
Sinus Iridum 1996 Apr 28 UT 20:00 Observed by Brook (Plymouth, UK, 60mm refractor, x112, seeing III, slight breeze, twilight) "dark shaded area on floor ~1/4 diameter of Sinus Iridum on western interior by rim" BAA Lunar Section Observation. ALPO/BAA weight=1.
Gassendi 1976 Oct 04 UT 20:55-20:58 Observed by Robinson (Devon, England) - observer noted that the east outside wall was bright in red and normal in blue. Note that the Moon was 30 deg above the horizon at the time of the observation. The crater returned to normal at 20:58. Also seen by Moore (Selsey, UK) and Foley (Kent, UK). At 21:25-21:50 D. Sims (Dawlish, UK, 25cm reflector, x300, seeing IV and some cloud at times) noticed a possible obscuration over the southern part of Gassendi. He had been observing earlier at 18:40-19:30 but had not detected a TLP in Gassendi then. 22:11UT Robinson notices that the spot outside the east wall is again bright in red., though by 22:25 it had faded and was gone by 22:28UT. The Cameron 1978 catalog further quotes: "Vivid red spots & general red color seen around rim by 2 obs. At 2209h blood red small area was seen. 1 h later the most westerly (IAU?) of the peaks had become hazy white all other areas were sharp. (Indep. confirm.)." Cameron 1978 catalog weight=5 and catalog ID #1454. The ALPO/BAA weight=3.
Aristarchus visible just past terminator. West wall was brighter than normal. Bright flash seen in/on NW wall - apparently in the same place as Pedler's May 17th sketch. Cameron 2006 extension catalog ID=146 and weight=4. Observed by M. Price of Camberley, Surrey, UK with a 6" reflector and a Moon Blink device. Seeing=III.
Plato 1981 Jun 13 UT 20:48-21:08 Observed by Price (Camberley, England, 152mm reflector, seeing III) Possible Moon blink (red) seen on north wall. Also the craterlets on the floor could be seen despite the observing conditions not being optimal. BAA Lunar Section observation. Cameron 2006 extension catalog ID=146 and weight=4. ALPO/BAA weight=3.
On 1984 Jan 14 at UT 20:00 P. Moore (Selsey, UK) observed that Aristarchus was brighter than it normally is at sunrise. No quantitative measurements were made though. The Cameron 2006 catalog ID=238 and weight=3. The ALPO/BAA weight=1.
Observer noted a bright spot on the interior west wall that seemed brighter than what they would have expected. unfortunately the precise time of this observation was not recorded so the moon-rise and midnight UT values are used to place a limit on the time of observation. Images by Shaw taken at UT 1754, 18:45 and 23:13 do not exhibit the effect.
On 1978 May 18 at UT20:45-21:53 J.D. Cook (Frimley, UK, 12" reflector, x240) observed Promitorium Laplace to have visually a brown colour - though no Moon Blink (red and blue filters) effect was detected. Cameron comments that this is probably a subjective effect - also others have reported something similar at times. The Cameron 2006 catalog ID=30 and weight=3. The ALPO/BAA weight=1.
Plato 1998 Jul 05 P. Moore (Selsey, UK, 15" reflector, x200- x400, seeing II/III) comments that he is puzzled why the floor of Plato, which is light gray in shade, looks completely blank tonight. The ALPO/BAA weight=1.
On 1980 Jul 24 at UT02:00 F. Graham (East Pittsburgh, PA, USA, 6" reflector) took some photos (albeit out of focus) that showed a bright spot on the west rim. Cameron comments that this spot was sharp compared to the rest of the photograph, so was probably a photographic artifact. The effect was not seen in the finder scope. The Cameron 2006 catalog ID=103 and weight=2. The ALPO/BAA weight=1.
M. Cook of Frimley, UK observed a brightening of the crater during this observing session. The cameron 2006 extended catalog ID=346 and weight=3. ALPO/BAA weight=2.
Barker's Quadrangle (Capuanus) 26W, 34S 1949 Feb 9 UT 20:00? Observed by Moore (England, 12" reflector) :Quadrangle not seen, apparently misty. (quad. in Capuanus? see Wilkins & Moore, The Moon, p124)" NASA catalog ID=514, weight=4. ALPO/BAA weight=3..
Gassendi 1939 Sep 25 UT 01:30 Observed by Haas (New Mexico? 12" reflector?) "NE part pf c.p. had I=9.4 comp. with I=6.4 (normal? in # 458. under similar obs. cond. (& phase. thus real diff.)" NASA catalog weight=4 (high). NASA catalog ID #462.
Gassendi 1967 Mar 22 UTC 19:39-19:43 Observed by Mosely (Armagh, N. Ireland, 10" refractor, x360) "Red color & blink strongly suspected in small area centred on junction of 3 clefts 1/2 way from c.p. & ESE wall. Well-defined & did not note change during obs. period. Clouds terminated obs. till 2120 when it was not seen." NASA catalog weight=3 (average). NASA catalog ID #1018.
On 1989 Sep 12 at UT00:58-02:25 D. Darling (Sun Praire, WI, USA, 12.5" reflector, x159, S=7/10) observed similar light conditions to 1989 Jul 15. At 02:00 he observed pink on the south west wall of Aristarchus crater. At 01:24UT the Aristarchus ray was yellowish, however the entire Moon had a grey-yellow tinge of colour. Chromatic aberation was observed at 01:56UT. By comparison Gassendi was checked and had no colour. At 02:10 the crater wall of Aristarchus was unusual and was quite different in appearance to rims of other craters. The cameron 2006 catalog ID=375 and the weight=1. The 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.
Plato 1870 May 12 UTC 22:00 Observed by Birt (England) "Extraordinary display of lights. Says not effect of sunlight" However an article by Nigel Logshaw in the Feb 2014 LSC suggests that it was probably just normal fine scale spots and streaks on the floor of the crater. NASA catalog weight=4. ALPO/BAA weight= 1. NASA catalog ID #167.
Plato 1981 Jun 14 UT 21:58 Observed by Foley (Kent, England, 11.75" Newtonian, Seeing III, Transparency Good) "Obscuration Seen" BAA Lunar Section Observation. ALPO/BAA weight=2.
Foley (Kent, UK) saw the west wall dull and stongly coloured. Moore (Sussex, UK) saw the wall as normal. However Cameron points out that Foley (Kent, UK) is a lot more Blue/UV sensitive than Moore. Mosely (Covington, UK) at 22:10 UT noticed a brightening on the East wall and at 01:10-01:25 UT suspected that the interior had a weak yellow-green cast to it. Cook (Frimley, UK) states that orange colour was within the interior crater, but green beyond the east rim at the 9 O'Clock and the south east corner to floor blue/mauvre beyond the northern rim NW/WSW. Foley sstates that orange and blue/mauvre might be spurious colour, but green one cannot get this way. Cameon suggests chromatic aberatons as a possibility but thinks that the observers concerned were experienced enough to recognize this if it were the cause. Cameron 2006 catalog extension ID=239 and weight=0. Moore used a 15?" refletor and Foley used a 12" refletor. Mosely experienced II seeing and good transparency. Cook had III seeing and also good transparency. P. Grego made an observation this night too. The ALPO/BAA weight=2.
Plato 1986 Dec 13 UT 20:30 Observed by A. Cook (Frimley, UK, seeing III) North East quadrant of Plato the crater was blurred and ill-defined. Also no craterlets visible anywhere on the floor of Plato until the central craterlet was just glimpsed later at 23:00-23:45, though seeing now III-IV (cirrus at times in the sky). At this later time the NE rim was less blurred than before. ALPO/BAA weight=1.
On 2016 Jul 17 UT 03:49 P.Zeller (ALPO, Indianapolis, IN, USA) imaged a pseudo-peak with shadow on the floor of Herodotus, however the image scale and quality of this colour image were not great and the observer suspects that it might be an imaging artefact. ALPO/BAA weight=1.
P. Foley of Kent, UK, using a 12" reflector, seeing=III-II, noticed that initially that the crater was pretty dull and that the floor was a slate blue-gray in colour at 22:45UT. A noticeable green spot inside the crater on the south east appeared at 22:25UT and vanished at 00:50UT. Cameron notes that one doesn't get green with spurious colour. Crater Extinction brightness measurements were made at 22:00 UT (reading=2.8) and at 23:45UT (reading=3.7). The crater dropped in brightness from 3.7 to 2.8 at 23:50UT and remained lower until 3.0 at 23:50-03:15 UT. A graph was produced and showed Proclus and Censorinus at similar brightnesses, but Aristarchus variable. The Earthshine was 0.3. Cameron 2006 Extension catalog ID=31 and weight=5. ALPO/BAA weight=3.
Cobra Head 1967 Mar 23 UT 18:40-20:47 Observed by Sartory, Moore, Moseley (Farnham, England, 15" reflector (Sartory) seeing very poor & 10" refractor in Armagh, N. Ireland (Moore & Mosely) x360 - seeing Fair to Poor) "Red patch seen intermittently; moon-blink from 1916-2047h. Position agreed with Sartory who alerted them to Aris. area; checks on others were neg." NASA catalog weight=5. NASA catalog ID 1020. Then Aristarchus 1967 Mar 23 UT 18:40-20:30, 21:30 by Marsh and Farrant (Cambridge, England, 8" reflector, x330). "Suspected colour on SW (ast.) wall. Farrant saw color in crater, completely independently, (inform. suggests same phenom. as seen by Moore & Moseley tho they said Cobra head). NASA Catalog weight=5. NASA catalog ID # 1021. ALPO/BAA weight=3.
Gassendi 1967 Mar 23 UTC 18:40-18:50 Observed by Sartory (Farnham, England, 15" reflector) "Heavy blink on inner S. wall. Moved toward N. at 1845, faded at 1850." NASA catalog weight=3 (average). NASA catalog ID #1019.
D. Darling of (Sun Praire, WI, USA, using a 12.5" reflector at x150, noticed a hint of red? colour on the south west rim of Aristarchus. Brightness measurements were normal for Aristarchus and Herodotus. No colour seen elsewhere e.g. Prom. LaPlace. The colour on Aristarchus had gone by 01:15UT. Cameron 2006 catalog extension ID=414 and weight=3. ALPO/BAA weight=3.
A fleeting faint reddish patch was seen in Gassendi at 21:15UT. This observation has an ALPO/BAA weight of 2.
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.
On 1964 Jan 27 at 21:00? Scarfe (UK) obtained spactra showing luminescence? The Cameron 1978 catalog ID=797 and weight=5. The ALPO/BAA weight=3.
Manilius 1968 Nov 04 UT 00:15-00:30 Observed by Jean et al. (Montreal, Canada, 4" refractor, 6" reflector) "Extremeley bright flash on Men. & Man. each." NASA catalog weight=2 (low). NASA catalog ID #1101.
Menelaus 1968 Nov 04 UT 00:15-00:30 Observed by Jean et al. (Montreal, Canada, 4" refractor, 6" reflector) "Extremeley bright flash on Men. & Man. each." NASA catalog weight=2 (low). NASA catalog ID #1101.
Plato 1874 Jan 01 UT 20:00? Observed by Pratt (England?) "Unusual appearance" NASA catalog weight=1. NASA catalog ID # 183. ALPO/BAA weight=1.
1982 Mar 08 Daniell UT 22:49-22:57 P.Madej (Hudersfield, UK) - A colour and brightness anomaly was seen a TLP alert was put out. Cameron 2006 catalog extension weight=165 and weight=3. ALPO/BAA weight=2.
On 1987 Mar 13 at UT 20:52 M. Mobberley (Suffolk, UK, S=VG) obtained some video that shows variation in Aristarchus crater e.g. ä visual oddity in the SE corner" (Foley was interpreting the video). H.Hatfield took some film of the TLP (Unstudied yet). The Cameron 2006 catalog ID= 301 and the weight=5.
On 1987 Mar 13 at UT 20:52 M. Mobberley (Sussex, UK) found that Mons Pico varied in its north east section. This was recorded on video tape. The Cameron 2006 catalog ID=301 and weight=5. The ALPO/BAA weight=2.
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 1961 Jun 27/28 23:00?-01:00? Observed by Granger & Ring (Italy). "Enhancement of Spectrum in UV at CaII similar to May obs." NASA catalog weight=5. NASA catalog ID #741. ALPO/BAA weight=3.
Enhancement of spectrum in UV and CaI recorded on photoelectric spectrometer scans by Grainger and Ring in Italy. Effect seen on Aristarchus and a ray near Bessel (approx 17E, 22N). Cameron 1978 catalog ID=740 and weight=5. ALPO weight=3.
Plato 1967 Feb 24 UT 04:21 Observed by Kelsey (Riverside, CA, USA, 8" reflector?) Using an Eng. moon blink device, discovered red brightest on NNE wall summit - duration 10min. NASA catalog weight=3. NASA catalog ID #1017. ALPO/BAA weight=3.
On 1964 May 26 UT 04:10-04:35 Bartlett (Baltimore, MD, USA, S=5, T=5). observed that Aristarchus had a strong blue-violet glow on the east wall and EWBS, with a strong violet tinge on the nimbus. Crater was hazy, could not focus it in red, green or blue light. The Cameron 1978 catalog ID= and weight=4. The ALPO/BAA weight=2.
Proclus 1955 Aug 03 UTC 04:13-04:40 Observed by Bartlett (Baltimore, MD, USA, 5" reflector, x180, S=5, T=5) "Floor blackish 2 intensity but in green filter assumed a distinctly mottled or flocculent appearance -- seen only in green. Neither blue nor red had any effect, but on previous eve. green light had not produced such an appearance." NASA catalog weight=4 (good). NASA catalog ID #602. The ALPO/BAA weight=3.
Aristarchus 1976 Jun 12 UT 05:21 Observed by Bartlett (Baltimore. MD. USA, 4.5" reflector, 40-225x, S=5, T=3, "Deep viol. tinge in N. 1/2 of nimbus. Faint blue-viol. radiance (gas ?) on E. - NE wall along crest. No color elsewhere, nor on plateau m." NASA catalog weight=4 (high). NASA catalog ID #1435.
F. Graham took some photos of the Cobras Head and found a blue cloud about 50 km in diameter and scattering light - Cameron says that this indicates high density. Darling found the Cobra's Head obscure and variable "clear and bright to diffused". Cameron was alerted observed (02:40UT) variations with periods of approximately 30 seconds, and thought that she could see a red tinge on the east rim of Aristarchus - checks elsewhere found no other colours. Darling found that a blue filter enhanced the effect and a red filter made it disappear. There was a blink at 02:55UT but no blink in the Cobra's Head, which looked fuzzy and lacking in detail. The effect was confirmed by Weier, who also saw two dark spots in the Cobra Head in blue but not in red light. The brightness of the Cobras Head was 6.0, Herodotus floor 5.5, NW wall 7.5, South wall, 7.0, Aristarchus south wall 9.0, west wall 9.0, south wall 7.0, East wall 8.0, and the central peak 10.0. Observer details were as follows: Darling (Sun Praire, WI, USA, 12.5" reflector, x159, S=9/10). D. Weier (Sun Praire, WI, USA, 12.5" reflector, x159, S= 9/10), W. Cameron (Sedona, AZ, USA, 8" reflector x110 and x220, T=6 and S=6) F. Graham (E.Pittsburgh, PA, USA, 7" refractor, thin haze). Cameron 2006 catalog ID=415 and weight=5. ALPO/BAA weight=4.
Aristarchus vicinity 1842 Oct 18 UT 23:00? Observed by Gruithuisen (Munich, Germany) "Mingling of all colors in small spots in W. & NW of crater. (interposition of year dates? was # 101 --1842 prob. correct." NASA catalog weight=4. NASA catalog ID #121. ALPO/BAA weight=3.
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.
On 1897 Oct 10 at UT 19:00 Pickering (Cambridge, Mass. USA, 15" refractor?) observed in Shroter's valley and the vicinity, "Variations in vapor col. change in direction of cloud rising from F is marked (time est. fr. given colon.)" The Cameron 1978 catalog ID=292 and the weight=3. The ALPO/BAA weight=2.
On 2000 Jun 16 UT 20:37 C. Brook (Plymouth, UK, 60mm refractor, x117 & x40, seeing good, transparency excellent) observed abright spot on the north rim of Mare Crisium (57E, 25N). It was comparable to the illuminated rim of Proclus in brightness. No colour seen. The spot was not visible the next night. The ALPO/BAA weight=1.
Proclus 1958 Aug 30 UT 06:30-06:45 Observed by Bartlett (Baltimore, MD, USA, 4" reflector, x240, S=6, T=5) "Proc. Q. a bright spot on NE rim apparently a crater presented a very abnormal aspect. Extraordinarily large & at least 9 deg bright -- like EWBS on Aris. This spot is subject to large unexplained variations. At 97 deg col. in July, Q was also 9 deg bright but very small. At col.96 deg, 5 in May '58, col.99deg in Feb.'50, & 96 deg in Nov. '55 it was not seen at all. Assoc. with tonite was a distinct blue glare on NE rim, extending for short dist. & @ 2x as far as S." NASA catalog weight=4 (high). NASA catalog ID #894.
Plato 1967 Nov 17 UTC 18:36-18:50 Observed by Moore, Moseley (Armagh, Northern Ireland, 10" refractor x260) "Faint blink under SW wall. Nothing seen vis. Gone by 1839h. Reappeared at 1841, then gone by 1850h. Checks till 0200h were neg. Obs. dubious of reality of phen." NASA catalog weight=2. NASA catalog ID #1054. ALPO/BAA weight=1.
Aristarchus 1970 Jan 23 UT 07:00? Observed by Thomas, Rogers, Corralitos Observatory (Organ Pass, NM, USA, 24" reflector, Moon blink) "Bluing around the crater -- vis. in monitor but not photographed due to clouds" NASA catalog weight=4 (high). NASA catalog ID #1233
W.Humboldt 1897 Dec 09 UTC 23:00? Observed by Goodacre (Crouch End, England, 12" reflector) "Shadow anomaly. Chocolate penumbral shade edging black shadow on E. wall." NASA catalog weight=3 (average). NASA catalog ID #296.
Cobra Head 1955 Oct 31 UTC 19:00 Observed by Milligan (England?) "Dark blue obscuration" NASA catalog weight=3 (average). NASA catalog ID 624.
On 1955 Oct 02 at UT 05:30-05:55 Bartlett (Baltimore, MD, USA, 3.5" reflector, x100, S=7, T=5) observed the following in Aristarchus crater: "Viol. gl. on E, NE rim, over EWBS resembled a viol. mist. Crater itself was hazy, could not get a sharp focus". The Cameron 1978 catalog ID=615 and weight=4. The ALPO/BAA weight=2.
Mobberley noticed that Torricelli B was bright and had an even brighter spot on the inner north wall. The observation was made from UT19:45- 21:40 using visual and video techniques. There was also a bright region NNE of Toricelli B, that was noticed. Foley examined the video and found that the crater faded in brightness over time and also the bright area to the NNE was not as bright on video as had been seen visually. Foley speculates that because the CCD camera was sesnitive to the near IR that maybe the spot was blue?. Foley observed from 21:12-21:21UT and also saw the bright spot on the inner north wall - but saw a blue halo around the crater. Response in blue filter, darkening over whole region. Brightness measures with a crater extinction device (CED) indicated that the crater was 80-85% the brightness of Censorinus. There was a bright area NNE of the region. M. Cook observed 22:10- 22:16UT (15cm reflector and seeing III-IV) and also saw that the crater was very bright indeed with a spot NNE of the region (same position as 28/28 1985 observation) - suspected that the crater might have been brighter than Censorinus, but judgement effected by seeing. In a blue filter the crater dulled leaving the bright spot prominent (but only during a good moment of seeing) - therefore had some suspicion of seeing effects. At 01:00-01:04UT M. Cook used a 12" reflector on the area, but the seeing was even worse - but did manage a check of the brightness of Torricelli B to Censorinus and now made it one quarter of that of Censorinus and no sign of the crater dimming in the blue as had been seen earlier in the 6" refletor. A. Cook (Frimley, seeing V) at 21:15UT (Dec 27) thought that Torricelli B looked normal and saw no colour. At Dec 28 at UT 00:02-00:25 A. Cook obtained some CCD images through red+IR (Wratten 25) and IR (Wratten 87) but found no colour differences, though there was a very slight hint that a brightness fade may have occurred between those two observing times. Note that this report does not have an entry in the Cameron 2006 Extension Catalog. The ALPO/BAA weight=4.
E. of Picard 1879 Nov 01 UT 00:00? Observed by an unknown observer (England?) "Bright spot. (Fort admits he has several more of these records of LTP, but does not give them because they don't fall nr. Mars'opposition which he tho't was cause of them.) Elevation rising N- S, with shading toward terminator." NASA catalog weight=3 (average). NASA catalog ID #214.
On 1955 Oct 03 at UT 04:45-05:05 Bartlett (Baltimore, MD, USA, 3.5" reflector, x100, S=5, T=3) observed the following in Aristarchus crater: "Whole cdrater hazy, couldn't focus it. Herodotus unaffected". The Cameron 1978 catalog ID=617 and weight=4. The ALPO/BAA weight=2.
On 1978 May 24 at 00:40-01:05UT P. Moore (Sussex, UK, and using a 12.5" reflector at x300-400 - seeing IV) saw colour in Aristarchus (red on the south east wall and southern "horn" of the crater. He could not detect colour elsewhere, but felt that the effect might have been spurious colour. With the increasing altitude of the Moon the light effect decreased. Moore detected red the next night as well (May 25th) and on May 27th, but it was not present on May 29th. The Cameron 2006 Extension catalog ID=33 and the weight=0. The ALPO/BAA weight=1.
Peirescius 1985 Dec 28 UT ~20:56 (Col. 112.5) H. Hill (UK) observed that this crater was piercingly bright. Repeat colongitude observations on later dates failed to show a similar effect. ALPO/BAA weight=2.
Madler 1962 Apr 22 UTC 11:48 Observed (2nd mesurement) by Wildey, Pohn (Mt Wilson, CA, USA, 60" reflector with photometer) "Photometric measures show change in brightness from Vmag=3.79 to V=4.40. The average brightness for age 17d is V=3.99. Crater faded from .2 mag brighter than av. to .4 mag. fainter (@1.5 times fainter) than av., a range of .6 magnitude, or @ 1.5 times diff. in brightness". NASA catalog weight=5 (very high). NASA catalog ID #757.
On 1897 Oct 13 at UT 20:00 Pickering (Cambridge, Mass. USA, 15" refractor?) observed in Shroter's valley and the vicinity, "Variations in vapor column" The Cameron 1978 catalog ID=292 and the weight=1. The ALPO/BAA weight=1.