On 1968 Dec 22 at UT 23:00 Ivan Mourilhe Silva (Rio de Janeiro, Brazil, 8.5" refractor) observed a light inside Aristarchus crater. This was during the Apollo 8 watch. The Cameron 1978 catalog ID=1107 and weight=2. The ALPO/BAA weight=1.
On 1983 Apr 16 at UT 02:00-03:00 W. Haas (Las Cruces, NM, USA) observed a bright phosphorescent, gray-green (like a "tritium lighted LCD watch", albeit much brighter) spot in the vicinity of Aristotles (16E, 45N) or Eudoxus (17E, 50N) craters. This was seen in Earthshine. The Cameron 2006 catalog ID=211 and the weight=2. The ALPO/BAA weight=3.
On 1980 May 18 at UT 22:27 P. Madej (Huddersfield, UK, 12" reflector, seeing very good) observed Taruntius crater (in Earthshine) to change brightness from black to light grey in about 30 seconds. Cameron 2006 catalog extension ID=95 and weight=2. ALPO/BAA weight=1.
Mare Tranquilitatis 1951 Dec 01 UT 01:08 L.T. Johnson (USA) suspected a flash near Cruger in Earthshine. Not sure whether stationary or moving. ALPO/BAA weight=2.
On 1987 Feb 03 at 00:30UT J. de Carlo (Little Falls, NJ, USA, 4.5" refractor, x260, x350, seeing-very good) observed a very bright yellow light in the centre of Mare Crisium (near a raised crevice), almost like a "gigantic nuclear bomb explosion "which expanded (to 1/8th the diameter of mare Crisium) and then reduced in size. The flare fickered at a rate of 1/10s. apparently the edge of this TLP looked rough, almost like emittyed debris. The TLP was fixed in position on the Moon. TLP confirmed by observer's father. The Cameron 2006 catalog ID=295 and the weight=3. the ALPO/BAA weight=2.
On 1961 Apr 19 at UT 20:00? an unknown observer reported in Aristarchus a light flash for 15 seconds. Cameron suspects a meteor? The Cameron 1978 catalog ID=735 and weight=1. The ALPO/BAA weight=2.
On 1981 Apr 08 at UT 21:45-22:00 P.W. Foley (Kent, UK, 12" reflector) found Aristarchus to be very bright, blue and variable. For example a CED brightness measurement at 21:45 was 0.5 and at 22:00 was 0.2. He also saw some white flashes on the eastern wall lasting each 2 sec in duration, Cameron 2006 catalog ID=128 and weight=1. ALPO/BAA weight=1.
In 1797 Mar 02 at UT 19:00? Caroche (France?) observed "a volcano on the Moon near Promontorium Heraclides". The Cameron 1978 catalog ID=76 and the weight=2. The ALPO/BAA weight=2.
On 1981 Apr 09 at UT 19:44 M. Price (Camberley, Surrey, UK, 6" reflector, 58x and 117x) saw a 4 sec brightening in Aristarchus in the clear Earthshine. Other features visible were: Grimaldi and some mare. Foley found the crater to be "luminous & translucent". Cameron 2006 catalog ID=129 and weight=0. ALPO/BAA weight=1.
On 1931 Feb 22 at UT 20:30 Joulia (Castelnaudary, Aude, France?) observed in the Aristarchus region: "Reddish-yellow glimmer of light, very variable with nearly complete extinction. (similar to Herschel's 1787 & Tempel's 6/10/1866 obs.)". The Cameron 1978 atalog ID=399 and weight=3.
On 1978 Dec 25 at UT 02:00 Taboada (Mexico) noticed that Aristarchus appeared to brighten in the dark though less intensely than Copernicus and Kepler (Cameron comments: älso brightening?). Alerted for tidal predictions by Middlehurst - Apollo 8 watch. The Cameron 1978 catalog ID=1111 and weight=1. The ALPO/BAA weight=1.
On 1979 Jun 30 at UT0246-0319 D. & D. Darling (Sun Praire, WL, USA, 12.5" reflector, 80x and 150x, S=5/10). A weak blue glow seen in the Aristarchus region. It was fainter than that in May 1979 but was relatively easier to see. There was one "streamer" going south and another to the south west, and then smaller ones within the crater. These streamers started to fade from view at 03:04UT and the blow glow changed to a blow spot and Aristarchus became normal by 03:19 UT. Cameron 2006 catalog ID=56 and weight=1. ALPO/BAA weight=2.
Observer: Fallows Observing site: Cape Town, South Africa. Cameron 1978 catalog describes the event as: Bright star-like point. A more detailed account is as follows: Early in the year 1821 -- and a light shone out on the moon -- a bright point of light in the lunar crater Aristarchus, which was in the dark at the time. It was seen, upon the 4th and the 7th of February, by Capt. Kater (An. Reg., 1821- 689); and upon the 5th by Dr. Olbers (Mems. R.A.S., 1-159).(25) It was a light like a star, and was seen again, May 4th and 6th, by the Rev. M. Ward and by Francis Bailey (Mems. R.A.S., 1-159).(26) At Cape Town, nights of Nov. 28th and 29th, 1821, again a star-like light was seen upon the moon (Phil. Trans., 112-237).(27).Cameron 1978 catalog ID=92 and weight=3. ALPO/BAA weight=2.
On 1988 Nov 15 at 10:07-10:40 UT P. Jean (Outremont, Quebec, Canada, 4" refractor?) saw to the SE of Eudocus (18E, ~43N) a luminescent area just over on the night side of the terminator - it was cone shapes and coppery in colour. Cameron comments that maybe it was a very low sun angle effect and she has seen something similar, but on the bright side of the terminator. Jean then goes onto comment that at 10:25UT a very dark line was seen south of the cone i.e. east of the terminator. A sketch was provided and P.Foley commented that the cone did not correspond to any terrain. Cameron 2006 Catalog Extension ID=339 and weight=3. ALPO/BAA weight=2.
2004 Dec 18 UT 02:00 F. Serio (Houston, TX, USA) may have imaged aperiod of brightening in this crater in images - though Darling comments that it could be a Registax issue. ALPO/BAA weight=1.
Ross D 1967 Dec 8 UT 02:30-02:40 Observer: Harris (Tucson?, AZ?), colourless bright area SW of Ross D with repeated condensations that appeared then dissipated in thirty seconds to a minute. ALPO/BAA weight=1.
Proclus 2003 February 8,2003 UTC 02:09-03:07 Observed by Gray (Winnemucca, NV, USA, 152mm F9 refractor Seeing 6-7, Transparency 6 305x) "Blinked Proclus with Wratten Red 25 and Blue 38A filters. Features seen through the red filter were basically seen with the same degree of clarity as in white light, in the case of sunlit walls, maybe a little bit better in the red. With the Blue 38A filter only the brightest part of the crater walls (north end) was visible-the rest of Proclus was dark shadow. At 3:07UT I compared the brightest parts of Proclus with Censorinus and Dionysius. The brightest parts of Proclus and Dionysius were comparable. Censorinus was much less bright than either of the above craters-the halo and crater were much faded over its usual brilliant appearance. Both Censorinus and Censorinus A were visible as distinct craters at 114x. The black shadow covering the east 40% of Proclus last night had broken up into three patches separated from each other by lighter bands. These were confined to the east crater wall. Only the central patch was black, the other two were considerably lighter. Running along the southwest edge of the crater floor of the crater floor appeared to be a hill to the north of which was a less elevated plateau. As the observing period progressed part of the brilliantly illuminated north crater wall developed a darker area which gradually became more prominent. As the sun is getting higher I would expect shadows and dark areas to diminish-what was happening here is unknown. However, this is not an unusual event for this part of Proclus". The ALPO/BAA weight=2.
Theophilus 1966 Jan 28 UTC 01:24-03:45 Observed by Cross & Ariola (Whittier, CA, USA, 19" reflector, x300, S=6-4, T=4, "3 red patches appearing and dissappearing at different times. Obscurred at sunrise on it. Later, red patch appeared on the floor." NASA catalog weight=5. NASA catalog ID #920. ALPO/BAA weight=3.
On 1891 Nov 30 at UT23:00 Observer: Fallows Observing site: Cape Town, South Africa. Cameron 1978 catalog describes the event as: Bright star- like point. Cameron 1978 catalog ID=93 and weight=3. ALPO/BAA weight=2.
Alphonsus 1965 Apr 08 UTC 20:00? Observed by Hoffman (Germany?) "Saw variable shining bright lights". NASA catalog weight=1 (very low). NASA catalog ID #873.
Aristarchus 1965 Apr 08 UTC 20:00? Observed by Hoffman (Germany?) "Saw variable shining bright lights". NASA catalog weight=1 (very low). NASA catalog ID #873.
Censorinus 1965 Apr 08 UTC 20:00? Observed by Hopmann (Czecholovakia?) "Green flash or brightening (date correct ? written 8-4-65. First taken as American convention, thus as Aug. 4, but now think it was in European convention of day first then month)." NASA catalog weight=2 (low). NASA catalog ID #873a.
Hyginius N 1965 Apr 08 UTC 20:00? Observed by Hoffman (Germany?) "Saw variable shining bright lights". NASA catalog weight=1 (very low). NASA catalog ID #873.
Linne 1965 Apr 08 UTC 20:00? Observed by Hoffman (Germany?) "Saw variable shining bright lights". NASA catalog weight=1 (very low). NASA catalog ID #873.
Proclus 1965 Apr 08 UTC 20:00? Observed by Hoffman (Germany?) "Saw variable shining bright lights". NASA catalog weight=1 (very low). NASA catalog ID #873.
On 1987 Nov 28 at UT 04:16-04:45 D. Louderback (South Bend, WI, USA, 3"reflector, x150, S=E) observed that the Promontorium Agarum plateau was rather dull and grayish - usually it was "tannish" "even > sunlit areas, & twin craters at his point A which are always > spots on plateau. At 0420 whole plateau sank into complete darkness, hard to distinguish from mare plain. albedo dropped to 5 from 6.8 reading. Nearby plain was normal 5 so phenomena had not spread to it. At 0424 Cape started to reappear to albedo 6 until 0445, when it returned to normal, but not sharply defined - like through haze. Detail better in red than in blue filter, sketches. The Cameron 2006 catalog ID=315 and the weight=4. The ALPO/BAA weight=3.
In 1878 Oct 03 at UT 20:00 an Unknown observer noted that Hyginus Nova had the most conspicuous of all appearances, and there was no trace of it on 1878 Oct 04. The Cameron 1978 catalog ID=201 and weight=3. The ALPO/BAA weight=2.
Einmart 1913 Jan 15 UTC 00:12 Observed by Pickering (Cambridge, Massachusets, 11" refractor, x330) "Spreading apron of white material like a sea of cloud. Not seen again after this date. Crater had been brightest area on moon between it & limb -- albedo 9. on Aug 5 albedo = 6. His atlas shows it bright. It grew dull after this date. He gave col. as 117? but FQ was at 1/15/?? at 10h" - note the quality of the NASA microfische is very bad and probably some of this text has been incorrectly read?. NASA catalog weight=3 (average). NASA catalog ID # 342.
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.
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.
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 1992 Oct 04 at UT 02:15-03:18 D. Louderback (South Bend, WA, USA, 3" refractor, x80) found that Eimmart crater was brighter in blue light than in red light - however Cape Agarum, and Mare Crisium were too. The Cameron 2006 catalog ID=454 and the weight=4. The AlPO/BAA weight=1.
On 1992 Oct 04 at UT 02:15-03:18 D. Louderback (South Bend, WA, USA, 3" refractor, x80) found that Mare Crisium was brighter in blue light than in red light - however Cape Agarum, and Eimmart were too. The Cameron 2006 catalog ID=454 and the weight=4. The AlPO/BAA weight=1.
On 1992 Oct 04 at UT 02:15-03:18 D. Louderback (South Bend, WA, USA, 3" refractor, x80) found that Mons Piton was very bright and was equal to Proclus (brightness of 9) in white light and 7.5 in violet, and 9.3 in red (Proclus was 9.2 in red). Ïn blue both features = (9?). "points on Piton affected were B, D, and C (S, W & N resp.) D in violet was fuzzy - ill defined". The Cameron 2006 catalog ID=454 and the weight=4. The AlPO/BAA weight=2.
On 1992 Oct 04 at UT 02:15-03:18 D. Louderback (South Bend, WA, USA, 3" refractor, x80) found that Promontorium Agarum was brighter in blue light than in red light - however Mare Crisium and Eimmart were too. The Cameron 2006 catalog ID=454 and the weight=4. The AlPO/BAA weight=1.
On 1983 Mar 21 at UT 21:05-22:00 P. Horne and J. Horne (Hertz, England, UK, 11" reflector, x180 and x330) found that Mons Piton (totally illuminated and brightest feature on the Moon - but no variability) was brighter than Aristarchus (would have been if it had been in sunlight) and the mountain was contained within a circular illuminated patch. "Brilliant white and no shadow. Size ~16km." There was no details visible but the adjacent features had distinct shadows. Hutton was also observing. Foley examined the photographs and believes that they are inconclusive. D. Mansbridge was photographing the Moon at 19:30UT and detects Piton but it is not bright. However in a photograph taken by D. Mansbrdige and 20:30UT the mountain is much brighter than any other sunward facing slopses on the northern part of the Moon's terminator. R. Mosley had been observing earlier at 18:10-19:40 and although finding the mountain to be shining briliantly beyond the terminator, he also comments that this is normal. Cameron though has seen the photographs taken and thinks it might be a real TLP. The Cameron 2006 catalog ID=208 and weight=5. The ALPO/BAA weight=2.
2004 Dec 20 UT 02:51-03:26 R. Gray (Winumma, USA) noted that the crater had exceptional brightness to nimbus surrounding it. ALPO/BAA weight=1.
Proclus 1972 Oct 15 UT 20:48 Observed by Hopp (13.25E, 52.5N, 75mm refractor) "Bright flash at the NW wall but poor seeing." T=3, S=5. Ref: Hilbrecht & Kuveler Moon & Planets (1984) Vol 30, pp53-61. ALPO/BAA weight=1.
On 1995 Jul 06 at UT 03:22-03:57 R. Spellman (Los Angeles, USA found that the floor of Proclus appeared to darken slightly through a blue filter. The ALPO/BAA weight=2. Source of this observation came from Spellman's web site.
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 1892 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.
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.
Sulpicius Gallus 1867 Jun 10 UT 22:00? Observed by Dawes (England?) "3 distinct roundish black spots. Absent on 13th" NASA catalog weight=3. NASA catalog ID #184. ALPO/BAA weight=1.
Eratosthenes 1976 Aug 04 UTC 02:07 Observed by Bartlett (Baltimore, MD, USA, S=6, T=3, 4.5" reflector 40-450x) "faint spot of light 4 deg bright seen in shadow on pos. of c.p. which is normally invis. At base of inner NW wall a faint bluish radiance (gas?) was observed". NASA catalog weight=4 (high). NASA catalog ID #1439.
Mons la Hire 1972 Nov 15 UT 09:45-10:18 M.Geisel (Brisbane, Australia, 12.5" f/8 reflector, x90) discovered the TLP, P. Anderson (9.5" reflector) independently confirmed that the TLP had an effect in his Moon Blink device - but the effect (suspected that the blink was caused by the extreme nrightness of the mountain?) was weak and thought it not worth further investigation. Photographs taken by Anderson. Geisel believes the effect to be real and states that the area remained sharp and clear throughout. ALPO/BAA weight=2.
On 1980 May 23 at UT22:30 (P.W. Foley (Kent, UK, 10" reflector, seeing II) described Aristarchus as a "blue luminous patch", but it was too faint to obtain a CED brightness measurement. Cameron 2006 catalog ID= 96 and weight=3. ALPO/BAA weight=2.
On 1980 May 25 at UT 22:18 G. Blair (Bridge of Weir, Scotland, 216mm reflector, seeing II-IV) suspected a short sharp flash, white in colour north of Tycho's north wall. Nothing more seen. ALPO/BAA weight=1.
2012 Sep 24 UT 22:00-23:00 Copernicus. E. Horner (Salisbury, UK, 15cm reflector) observed a prominent red arc where the sunlit part of the interior wall met the shadow. Sometimes the arc was 1/4 the way around the interior, and sometimes half of the way around. Telescope moved, but the red arc stayed where it was. Eyepieces change, but the effect remained. Other parts of the Moon checked, but no red seen. There were however splashes of green e.g. Longomontanus on the terminator, elsewhere further inland from the termionator, and little splashes of green on Mare Frigoras - but lasting a brief time. The red colour was as strong as a red LED and the green similar to that of the northern lights. The observer's husband was asked to independetly check Copernicus and remarked that he could see a little bit of green at the top and some red near the bottom, along the line of the internal shadow. Although there were checks for red elsewhere on the Moon and none were seen, the Moon was starting to get low and it is typical of spurious colour in a few respects. Therefore the ALPO/BAA weight=1 for safety.
Proclus 1969 Nov 18 UT 20:00? Observed by Classen (Pulnitz, Czechoslovakia, 8" refractor) "Brightened, exceeded normal. Brightness is monitored relative to Censorinus. (started July, 1969) Obs. thinks all bright craters are variable. (Apollo 12 watch)." NASA catalog weight=2 (low). NASA catalog ID #1216.
On 1995 Jul 07 at UT 04:22 R. Spellman (Los Angeles, CA, USA) noted that the floor of Copernicus was slightly darker in blue light. The ALPO/BAA weight=1. This report came from R. Spellman's web site.
On 1995 Jul 07 at UT 04:22 R. Spellman (Los Angeles, CA, USA) noted that the inside of Bodin darkened in blue light and also the floor was darker in white light than it was the previous day. The ALPO/BAA weight=1. This report came from R. Spellman's web site.
On 1995 Jul 07 at 04:22UT R. Spellman (Los Angeles, CA, USA) noted that the floor of Proclus looked slightly darker in blue light. The ALPO/BAA weight=1.
Copernicus 1969 Nov 18 UT 21:10-21:11 Observed by Hedervari (Budapest, Hungary, 3.5" refractor) "Yellowish-red stripe on inner W. wall (chrom. aberr.? Apollo 12 watch)." NASA catalog weight=2. NASA catalog ID No. 1217. ALPO/BAA weight=1.
Goldschmidt 1969 Nov 18 UT 21:59 Observed by Brandi (Wald, Switzerland, 6" reflector x90) "Brightening -- photo. (the author, WSC, cannot verify LTP on film. Its brightness similar to other features at same term. dist. Shadow is anomolous if real -- very narrow streak beside it & beyond main shadow (Apollo 12 watch)." NASA catalog weight=5 (very high). NASA catalog ID #1218.
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 (high). NASA catalog ID #203.
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.
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 1970 Dec 07/08 UT 23:30-00:45 UT Observed by Fitton (Oldham, England, 8.5" refkector, x200, S=G) "Floor blank, yet some craters should be vis. Outer wall craters showed clearly. (similar to Bartlett's obs on Nov. 8th, #1278" NASA catalog weight=3 (average). NASA catalog ID #1279.
Observed by G.H. Johnstone of Albuquerque, NM, USA on 1954 Nov 05 UT 20:00 (according to Cameron), but 02:00-04:00 according to the original observation and at colongitudes 34.7 to 35.7 deg. 4" reflector, x150 used. The obsewrver reported that the western part (about 1/3rd of the interior) was pitch black with shadow. However there was a zone about as wide, or perhaps only a fourth of the total width that was distinctly a lighter bluish shade, almost like twilight. The shadows of the peaks on the western edge of the rim were clearly seen crossing this bluish shadowed area. Then this area ended sharply, and the farside was bathed in light from the rising sun. The shadows of the peak were sharply defined across the twilight zone, and the edge of the pitch black shadow was easily defined but not as sharp as the darker shadows crossing the the blue twilight zone. The observer checked other craters but did not see this condition in any of them - they all had the abrupt division between black and white that we would normally expect to see. Cameron 1978 catalog ID=579 and weight=2. Reference 1962 edition of ALPO's Journal: The Stolling Astronomer. ALPO/BAA weight=3.
Censorinus 1969 Nov 19 UT 1922 Observed by Brandli (Wald, Switzerland, 6" reflector, x90) "Brightening -- photo, (the author, WBC, cannot verify from photo. It is brighter, but so are Proc. & Dionys. -- it being between. i.e. Proc. > Censor. > Dionys. Apollo 12 watch)." NASA catalog weight=5 (very high). NASA catalog ID #1220. ALPO/BAA weight=1.
Plato 1970 Dec 08 UT 18:00-23:59 UT Observed by Fitton (Oldham, England, 8.5" refkector, S=VG) "All surrounding detailperfect, but barely a trace of floor detail. A suggestion of 2 or 3 white spots including central A seen only on one examination out of five. "sector" beginning to show. ALPO/BAA weight=1.
Plato 1870 May 10 UTC 22:00 Observed by Birt (England) "Extraordinary display of lights. Says not effect of sunlight" NASA catalog weight=4 (high). NASA catalog ID #167.
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=3.
Piton 1969 Nov 19 UT 21:15-22:00 Observed by Baum (England, 4.5" refractor) "Traces of cloudiness on E. slope at 2115h. Increased at 2150h in extent & brightness. Spread onto plain. Summit & shadow in W. part sharp & clear. (Apollo 12 watch)." NASA catalog weight=2. NASA catalog ID #1221. 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.
Ramsden 1999 May 25 UT 20:57-21:22 Observed by Brook (Plymouth, UK, 4" refractor, x216, seeing II-III) "Bright spot on W wall - brightness variation seen. - At the start it was bright, then it faded, and towards the end of the observation it was starting to brighten again". BAA Lunar Section observation. ALPO/BAA weight=1.
U.K. observers: G. North and P. Foley, both saw a wisp of blue associated with this crater. Cameron 2006 catalog extension ID=209 and weight=4. ALPO/BAA weight=3.
Daniell 1979 Jun 05 UT 20:15-21:10 Observed by Price (Camberley, England, 152mm reflector x64 and x128, seeing III, transparency good) "Obscuration seen" BAA Lunar Section report.
Daniell 1979 Jun 05 UT 20:15-23:00 Observed by Price (Camberley, England, 152mm reflector x64 and x128, seeing III, transparency good) observed that Posidonius lacked sharpness.
Hyginus N 1944 Apr 04 UT 20:00? Observed by Wilkins (Kent, England, 15" reflector) "Darker than usual. S. edge of great crater valley was bordered by a narrow dark band for 13km along its length" NASA catalog weight=4 (high). NASA catalog ID #490.
SE of Ross D 1965 Mar 14 UT 07:40 Observed by Cross (Whittier, CA, USA, 12" reflector) "Crater wall partially obscured; bright" NASA catalog weight=3 (average). NASA catalog ID #872.
Plato 1980 May 25 UT 21:33-22:54 Observed by North (Seaford, UK, seeing III-IV, 460mm Newtonian) Definite strong reddish glow along NNW border, definitely much stronger than spurious colouration and always visible when telescope moved in RA and Dec to eliminate possible chromatic aberation effects in the eyepiece. Effect ended by 21:54 UT. BAA Lunar Section Report. ALPO/BAA weight=2.
Gassendi 1969 Nov 20 UT 19:30-19:45 Observed by Becker (Holland, 4" refractor) "Curious small shadow from NW (ast. ?) wall. (Apollo 12 watch)" NASA catalog weight=1 (very low). NASA catalog ID #1224.
Aristarchus 1969 Nov 20 UT 19:45-20:05 Observed by Becker (Holland, 4" refractor) "Sharp whiteness on inner W. (ast. ?) side (Apollo 12 watch)" NASA catalog weight=1 (very low). NASA catalog ID #1224.
Plato 1870 May 11 UTC 22:00 Observed by Birt (England) "Extraordinary display of lights. Says not effect of sunlight" NASA catalog weight=4 (high). NASA catalog ID #167.
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.
Censorinus 1981 Apr 15 UT 22:15-23:10 M. Cook (Frimley, UK), using a 12" reflector,found Censorinus to be glowing exceedingly bright and was brighter than Proclus. It dulled later, but was still brighter than Proclus. Censorinus was also slightly brighter in blue than in red light. Cameron 2006 catalog extension ID=130 and weight=3. ALPO/BAA weight=1.
Aristarchus-Herodotus 1968 Dec 31 UT 03:30-03:45 Observed by Taboada (Mexico) "Terminator between the two was diminishing in brightness over edge of Herod. at 0345, 2 darker spots seen over same place. (alerted by Middlehurst for tidal predict.?)" NASA catalog weight=1 (very low). NASA catalog ID #1112.
On 1968 Dec 31 at UT 03:30-03:45 Taboada (Mexico) observed the terminator between Aristarchus and Herodotus was diminishing in brightness at 03:45UT over the edge of Herodotus. Two darker spots were seen over same place. Alerted by Middlehurst for tidal predict? The Cameron 1978 catalog ID=1112 and weight=1. The ALPO/BAA weight=1.
Torricelli B 2005 Jan 21 UT 21:21-21:43 Observed by North (Norfolk, UK, 20cm reflector, x64, x128, Seeing IV, Transparency, moderate) "Torricelli B appeared rather dull with a prominent dark halo of a strongly bluish tint. The halo extends a few sec of arc beyond the crater. At 21:21-21:43 crater was varying in brightness but this may have been due to the seeing? By 21:42 the dark halo was gone. By 21:44- 21:49 UT the crater was brighter and more normal in brightness than before. By 22:17 UT all was normal. The variations in brightness were also seen by Cook (Mundesley, UK). Observations by Carbognani (Itlay) 21:20-23:10 failed to find any variations in brightness. Nor did Amato (CT, USA) from 23:00-23:15 UT."
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.
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..
M. Cook of Frimley, UK, noticed Torricelli B to have a blue tinge inside and outside. No colour had been noticed earlier on 19-21 Mar. Cameron reports also in her catalog that the halo around Torricelli B had lost its brilliance as seen on 29th Mar. Cameron 2006 catalog extension ID=210 and weight=5 - apparently being confirmed by Marshall, Mobberley and Foley. ALPO/BAA weight=3.
Torricelli B 2005 Jan 22 UT 01:00 Observed by Serio (Houston, TX, USA, 6" Cassegrain, x150 and x180, Seeing 3, high deck of Cirrus clouds) "Torricelli B hard to make out in the videos taken, but images taken through cloud. A check on the image received by the coordinator shows that Torricelli B is in fact visible, but perhaps not very bright. A later observational sequence of images by Raul Salvo (Montevideo, Uraguay UT 03:15-03:23) showed similarly that Torricelli B was dark, and there was some brightness variability although the background setting on these was low" An ALPO report.
Plato 1972 Oct 19 UT 20:10 Observed by Taylor, Phillips, Ford, Kennedy (Dundee, Scot. 10" refractor) "Taylor noted a slight blink on NW wall. Ford said it was neg. Phillips was not sure. Taylor returned to telescope & no blink. Kennedy reported neg." NASA catalog weight=1 (very low). NASA catalog ID #1347.
Foley, Kent, UK noted that the floor was slate blue-grey with no colour seen elsewhere. 12" reflector used, seeing=II. Cameron 2006 extension catalog ID 131 and weight=1. ALPO/BAA weight=1.
Herodotus 1969 Jan 01 UT 03:15 Observed by Taboada (Mexico) "Brightness in edge of crater dimmed & a heavy darkness was noted thru course of cleft (Schroter's Valley?). (alerted for tidal predict.?)"NASA catalog weight=1. NASA catalog ID # 1113. ALPO/BAA weight=1.
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 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.
Cobra Head 1955 Sep 28 UTC 23:00 Observed by Bestwick (England? 6?" reflector x240) "Diffused brown patch of smoke or vapor, almost obscured -- appeared over plain for a short distance."NASA catalog weight=3. NASA catalog ID #612.
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.
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.
Johnson, of Des Moines, Iowa, USA, using a 7" reflector and an 8" refractor, saw a bight streak. The observer looked later, but it was no longer visible. Cameron thinks that it might have been a reflection from the wall. Cameron 1978 catalog ID=423 and weight=1. ALPO/BAA weight=1.
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.
Aristarchus 1975 Sep 18 UT 21:00? Observed by Foley (Kent, England, 12" reflector) "Deep blue-viol. spot in NW (IAU?) interior corner." NASA catalog weight=3. NASA catalog ID #1414. ALPO/BAA weight=3.
Mobberley of Suffolk, UK, and using a 14" reflector and seeing=I-II saw yellowish/brown streaks within Aristarchus. A sketch indicates that these extended from a region on the east floor to the north west corner, and then finally onto the bands on the west wall. Cameron 2006 extension catalog ID=132 and weight=4. ALPO/BAA weight=1.
Plato 1870 May 13 UT 22:00? Observed by Pratt (---), Elger (Liverpool, England), (Gledhill (Brighton, England) "Extraordinary display of lights. 27 seen by Pratt, 28 by Elger, only 4 by Gledhill. (independ. confirm. ?" NASA catalog weight=5 (very good) NASA catalog ID #168. A bit more of a detailed report is as follows: "Upon the 13th of May, 1870, there was an "extraordinary display," according to Birt: 27 lights were seen by Pratt, and 28 by Elger, but only 4 by Gledhill, in Brighton. Atmospheric conditions may have made this difference, or the lights may have run up and down a scale from 4 to 28. As to independence of sunlight, Pratt says (Rept. B.A., 1871-88), at to this display, that only the fixed, charted points so shone, and that other parts of the crater were not illuminated, as they would have been to an incidence common throughout.(30) In Pratt's opinion, and, I think, in the opinion of the other observers, these lights were volcanic." ALPO/BAA weight=4.
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=3.
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.
Manilius 1939 Jul 30 UT 06:00 Observed by Haas? (NM?, USA, 12?" reflector) "Dark area in S. part wad I=3.7 comp. with #449. Cond. were similar. (phase same. real difference?). (normal here?)"
G.Amery (Reading, UK, seeing=II) saw a brilliant white rim, bands and central peak. There was also a clearly seen white glare like feature over the ESE wall that had a direction opposite to the crater interior bands. Cameron states that Foley says that this is usual. High CED brightness readings obtained. M.Cook of Frimley, UK, took CED measurements at 23:35UT and recorded a brightness of > 4.9. Reported a reversal of spurious colour - Cameron suspects that this was a local effect. No spurious colour noticed by anyone else. However the brightness of the crater was confirmed by other observers. Mosely suspected a brightness change on the inner east wall at a relative position of 8 O'Clock. Cameron 2006 extension catalog ID=259 and weight=4. ALPO/BAA weight=3.
Aristarchus 1973 Sep 11 UTC 20:48-21:06 observed by Pasternak (53deg 20'N, 7deg 30'E, 75mm reflector T=1, S=3) "reddish colours at the S of Aristarchus from 20.48-21.00 U.T., area spread to the region E of the crater at 20.57 U.T., disappeared there at 21.04U.T., no colours after 21.06 U.T." - Hilbrecht and Kuveler, Earth, Moon & Planets, 30 (1984), p53-61. ALPO/BAA weight=1.
On 2009 Sep 03 at UT23:15-23:17 B.Gibbs took some hand held digital SLR images of the Moon (Sky conditions clear). Four images were taken at: 23:14:53, 23:15:59, 23:16:05 and 23:17:23 (uncertainty +/-15 sec offset from actual UT). These showed some apparent variation in the brightness of Aristarchus. However there are ways toexplain this through image motion blur when the images were taken. However we cannot be absoultely sure. The ALPO/BAA weight=1.
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.
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.
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.
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.
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.