Plato 1967 May 20 UT 01:13 K.Simmons (Jacksonville, FL, USA, 10" reflector) observed a large bright (intensity 6.5) oval area on near the central floor. According to Ricker and Kelsey (ALPO selected area coordinators) this is unusual. ALPO/BAA weight=1.
Plato and Plato A 1972 Jan 26 UT 18:25-18:55 Observed by Watkons and Hunt (England, 4.5" reflector x150, x225, and a 2.75" refractor) "Misty patch over A, & a misty brightness over SW wall of Plato. Hunt saw nothing unusual." NASA catalog weight=2 (low). NASA catalog ID #1321.
On 1980 Aug 21 at UT20:00 J.H. Robinson (Teighmouth, Devon, UK) detected colour, using a Moon Blink device, and "mistiness" on the southern floor of Tycho crater. The seeing was poor! Cameron 2006 catalog ID=104 and weight=1. ALPO/BAA weight=1.
SE of Ross D 1966 Oct 25 UT 03:46 Observed by Cross (Whittier, CA, USA, 19" reflector, x300, S=2-4 (sometimes 5), T=3-4) "Large bright area obscuring 1/2 of Ross D crater wall. Not present Oct 24" NASA catalog weight=3 (average). NASA catalog ID 986. Actually some activity was observed the fay before according to the original notes. ALPO/NAA weight=2.
Archimedes 1973 Jun 11 UTC 21:05-21:15 observed by Pasternak (53deg 20'N, 7deg 30'E, 75mm reflector) "Faint red area at the E of Archmedes, diminution from 21.10-21.15UT" - Hilbrecht and Kuveler, Earth, Moon & Planets, 30 (1984), p53-61
Om 1987 Sep 04 at UT 03:00 J. Caruso (Middletown, CT, USA, 3" refractor, x155, S=6/10 and T=8/10) found that Bianchini G was not visible, however Heraclides E, Helicon G, and indeed many other smaller craters could be seen. There were two small mountains in the general area of Bianchini G. and a mare ridge - all these were clearly seen. Caruso states that Bianchini G should normally be much more clearly seen than the other features mentioned and is the same size as Heraclides E. The Cameron 2006 catalog ID=305 and the weight=3. The ALPO/BAA weight=1.
Gassendi 1966 May 30 UT 20:32-20:59 Observed by Sartory (England, 8.5" reflector + filters) "Orange patch & obscuration -- detected by Eng. moon blink system. Color seen visually."NASA catalog weight=4 (good). NASA catalog ID #941.
On 1955 Jan 05 at 01:00-01:30 UT D.A. Logue (Larchment, PA, USA, 15cm reflector at x340, seeing Good) saw a strange blue light above the surface of the Moon where the night and the day meet. He observed this light for more than 30 min and it did not appear to move. It appeared like a star in that the rays of light came from it. The observer adds that he first thought thst the objects was a star, but later decided that it had to be on the Moon itself. A drawing shows the blue spot near the rugged south west (IAU?) limb of the Moon. The editor of the Strolling Astronomer (Vol 8, No. 11-12, Nov-Dec 1954, p146) was unable to identify the craters drawn. The editor speculates that the observer saw a high mountain peak with its summit in sunlight and detached from the illuminated regions - however this would not explain the blue colour. Note this is an ALPO observation and does not apear in the Cameron catalogs. ALPO/BAA weight=2.
On 1964 Jun 21 at UT 21:18 Lipskii and Pospergelis (Shternberg State Ast. Institute, AZI-2" reflector (Cass.) observed Aristarchus: "Polarization meas. with electron polarimeter. Plane of polariz. rotated 2deg fr. the adjacent areas. They interpret it as some scattering medium over the crater. (Source gave date as 6/31/64, misprint =21st?)". The Cameron 1978 catalog ID=820 and weight=5. The ALPO/BAA weight=4.
Gassendi 1968 Oct 03/04 UT 19:30-19:50 & 00:20-01:40 Observed by Rawlings (Aylesbury, UK, 6" reflector low magnification) and by Moore (Selsey, Sussex, UK, 12.5" reflector, x360) "Slight blink (Eng.) arcuate in shape, N. of c.p. (Rawlings dubious). Moore, with blink device saw none at 0020-0140h. No LTP in Gass., Ptol. or Aris. 5th or 6th.". NASA catalog weight=1. NASA catalog ID #1093. ALPO/BAA weight=1.
On 1976 Nov 03 at UT20:00-21:40 P.W. Foley (Kent, UK) reported a TLP in Gassendi - some obsevers detected colour, others did not. P. Moore did not notice anything unsual earlier at 18:50-19:00, though his seeing was IV-V. Nor did he see anything unsual from 21:53-00:20, but seeing was still IV-V. D. Jewitt, observing 20:34-21:25 and 22:55-23:20 also reported nothing unusual. Amery (Reading, UK, 25cm reflector, x300) did however notice a small reddish spot to west of central ridge, but by 20:30UT the colour was less obvious, but the spot was back again at 20:45, but not easily seen at 21:00 and gone completely by 21:45UT. N.Bryant (Ilfracombe, UK, 25.4cm reflector, x260), observed 3 red patches on the floor between 20:54 and 21:31UT. A BAA Lunar Section report. ALPO/BAA weight=3.
On 1980 Aug 22 at UT20:15-21:29 J-H Robinson () detected violet on the west wall of Aristarchus. Cameron 2006 catalog ID=105 and weight=5. ALPO/BAA weight=2.
On 1980 Aug 22 at 02:15-21:29UT J-H Robinson (Teighmouth, Devon, UK, 12" reflector, x200, seeing=II) noticed in the area south east of Manilius that it was brighter in red light than in blue light at 20:15UT whereas 1 minute later it was the same brightness in each filter. The effect reappeared at 20:21UT and was particularly strong at 20:32UT. Foley (Kent, UK) verified this at 21:01UT - the blink area was of high reflectivity in white light and was bright in red at 21:15UT, thougjh the south east area stopped giving a colour reaction at 21:25UT. Madej (Huddersfield) found Manilius B to be norm al at 23:52UT however at 23:55UT it was surrounded by a transient white ring that varied in visibility in an irregular way. Foley found Manilius B had a vivid blue interior and in blue light the ring was black. and not at all seen in red or white light. The CED brightness measurement varied from 1.9 to 2.4. All other regions observed were normal in brightness. Violet was seen on the west wall of Aristarchus though. M.Price (Camberley, UK) found a possible blink in Manilius B but was observing under poor seeing conditions. Cameron 2006 catalog ID=105 and weight=5. ALPO/BAA weight=4.
Gassendi 1973 Jun 12 UT 20:50-21:15 observed by Baumeister (48.83N, 9.25E, 240mm reflector, T=2, S=3) "Bright point at the NNE slope of the central peak" - Hilbrecht and Kuveler, Earth, Moon & Planets, 30 (1984), p53-61. ALPO/BAA weight=1.
On 2017 Sep 02/03 UT 23:55-00:30 A.Anunziato (Parana, Argentina, 105 mm Maksutov-Cassegrain, x154, seeing 6/10, some interuption from clouds) observed a light spot SE of the centre of the floor of the crater, which came and went in visibility. There is a light spot here, but what was unusual was that the visibility decreased over time. ALPO/BAA weight=1.
On 1825 Jan 01 UT17:00? an unknown Russian observer noticed a cloud in Mersenius.
nr Fra Mauro 1970 Aug 14 UT 05:00? Observed by Bell (Californina). "Bright blue-white flare (meteor?)(call for obs. at Fra Mauro at perigee because of moonquakes there -- therefore biased to tidal hypothesis. That was the original location given for the A1 moonquake site, but it is located elsewhere now. Ancill. data given for 1970)." NASA catalog weight=1. NASA catalog ID #1273. ALPO/BAA weight=1.
Aristarchus 1982 Nov 27 UT 20:13-01:00 J-H Robinson (Teighmouth, Devon, UK) found that the bands of Aristarchus were clearer in red than in blue light. North found that the sunlit part of the crater was very bright. M. Cook described the crater as a "kaleidoscope of colour. Foley observed UT 23:05-01:00 (Kent, UK, Antionadi III, Transparency Moderate) - Colouration Seen - Ref: BAA Lunar Section Circular. The Cameron 2006 catalog ID=190 and weight=5. The ALPO/BAA weight=3.
Herodotus 1950 Mar 30 UT 19:00? Observed by Wilkins (Kent, UK, 15" reflector) "Transient c.p. (similar phen. to Bartlett's in later yrs.? see #532). NASA catalog weight=4 (good). NASA catalog ID #523. ALPO/BAA weight=3.
On 1997 Oct 13 at UT11:09-11:21 D. Rodway (Oamaru, South Island, New Zealand, 8.5" reflector, x270) saw a deep salmon-pink colouration in the south east corner interior of the crater Aristarchus. This colour was confirmed by the observers wife. By 11:21 UT the colour had faded completely. Rodway had been a lunar observer since 1958, using a wide range of instruments from 3 inch refractors to 12 inch reflectors and had observed a TLP in Gassendi back in 1966 (from L'ondon, UK), and so was an experienced observer. The ALPO/BAA weight=4.
On 1982 Aug 01 at UT20:50 M. Mobberley (Suffolk, UK, 14" reflector, seeing III-IV) found that LaPlace A was significantly more prominent than usual - comparisons were made with photographs in books. The Cameron 2006 catalog ID=178 and weight=3. The ALPO/BAA weight=1.
Aristarchus, Herodotus 1963 Dec 28 UTC 15:55-16:26 Observered by Yamada et al, (Hiroshima, Japan, 10" reflector, x278) "Red area, spreading to Herod., a perculiar obscuring gray area on N. edge of glow. Drawing. (confirm. of Olivarez? with activit > 1/2 day?)."NASA catalog weight=5 (very high). NASA catalog ID #789.
Aristarchus, Herodotus 1963 Dec 28 UTC 15:55-16:26 Observered by Yamada et al, (Hiroshima, Japan, 10" reflector, x278) "Red area, spreading to Herod., a perculiar obscuring gray area on N. edge of glow. Drawing. (confirm. of Olivarez? with activit > 1/2 day?)."NASA catalog weight=5 (very high). NASA catalog ID #789. ALPO/BAA weight=4.
Aristarchus, Cobras Head 1966 Oct 27 UTC 02:30-03:00 Observed by Delano (new Bedford, Massachusetts, USA, 12.5" reflector x360) and Corralitos Observatory (Organ Pass, NM, USA, 24" reflector & Moonblink) "C.p. of Aris. noticeably less bright thro blue filter but very bright thru red & no filter. Shadow of C.p. faint & grayish whereas wall shad. were normal black, (confirm. of Gordon, even tho 2h later?). Sketch of C.p. rated at 10deg in red & no filter, & 8deg in blue. Other features rated same in all 3. Cobra Head had 2 red patches. Sketches. Not confirm. by Corralitos MB". NASA catalog weight=5 (very high). NASA catalog ID 989.
On 1977 Apr 01 at UT 20:40-21:10 D.Sims (Devon Valley, Dawlish, Devon, UK, 25.4cm reflector, Wratten 25 and 44a filters, x300, seeing II) found Schroter's valley clearer in red than in blue. No colour filter reactions seen on other features. This is a BAA Lunar Section observation. ALPO/BAA weight=2.
Near Furnerius 1920 Nov 23 UTC 20:00? Observed by an unknown observer (England?) "Shaft of light projecting from Moon, or spot so bright it appeared to (strong ray?)" NASA catalog weight=1 (very low). NASA catalog ID #378
On 1915 Jul 24 at UT 22:00? Barabashovihi (Russia) observed a TLP on the west limb: "When phi Strettsa (?) approached the edge but still separated, the star began to stretch in a belt 3X its own length & then instantly disappeared. Probably no significant atm. or vapors. (similar to other reports of fading occult. Gives limb as E. but that is in ast. convention)". The 1978 Cameon catalog ID= 357 and weight=2. The ALPO/BAA weight=1.
Oenopides-Selecucus 1951 Aug 15 UT 13:11 T,Osawa (Japan) observed a brownish tinge to the terminator region in the vicinity of these two craters. ALPO/BAA weight=1,
On 1960 Sep 04 at UT00:00? Miranova (Russia or Israel) observed a TLP at an unnamed lunar feature: "Spectral photom. of some lunar obj. in 4250, > 5000A bands. Spectral plates". Cameron suspects luminescence? The Cameron 1978 catalog ID=730 and weight=5. The ALPO/BAA weight=1.
Aristarchus 1982 Nov 28 UTC 23:35-23:55 Observed by Foley (Kent, UK, Antionadi III, Transparency Moderate) - Colouration Seen - Ref: BAA Lunar Section Circular. ALPO/BAA weight=2.
Aristarchus 1975 May 23 P.W. Foley (Wilmington, UK, 12" reflector, x200, x360, x624, atmospheric clarity good, seeing III from 20:15-22:30, but the clouded out at 22:30, and from 23:15-01:15 seeing was IV-V with poor transparency) observed (22:20-20:45 UT) variation in the SE corner of the Aristarchus, namely the usual dark bands were alternating light to dark, not in keeping with otyher crater features. This effect was not linked to atmospheric turbulence. Also projected image of bands beyond the crater W. wall were repeatedly noted. The observer broke away from observing at 20:45UT to make a telephonealert call. At 20:55UT they noted that the area between Vallis Schroteri and Herodotus seemed very light/bright, also the E. exterior of the crater wall of Herodotus. From 21:01-21:11 A slight blueness was seen to extend from the NE corner of Aristarchus, along the exterior rim, acrossand beyond Herodotus to the SW. A tgorough search was made of many bright areas, both near the terminator and to the E., but no blueness could be detected elsewhere. A slight orange hue was noted along the E. limb of theMoon (Spurious colour). From 21:18;22:30 Aristarchus seemed normal again, and likewise the head of Vallis Schoteri too. The observer was clouded out from 22:30-23:15and from 23:15-01:30 the seeing was so appaling that no colour or projection of the bands could be seen. A Moon Blink was used during the session, but no colour was detected in this? Another observer, R.W. Rose (Devon, UK) observed 21:20-21:30 but had IV seeing, and saw nothing unusual, but commented that if TLP wactivity had been taking place, then they would probably not have seen it. The ALPO/BAA weight=1.
On 1964 Jun 23 at UT 04:45-05:05 Bartlett (Baltimore, MD, USA, 5" reflector, x180, S=4-1 and T=3) observed a blue-violet glare on the north east rim and a strong violet tinge in the nimbus. The effect was absent 1 hour earlier. The Cameron 1978 catalog ID=821 and weight=4. The ALPO/BAA weight=2.
Aristarchus 2015 Mar 03 UT 23:58 Brendan Shaw (UK) saw a flash on the NW rim of Aristarchus on his computer screen - the camera was working in the near IR. Seeing was not very good at the time. Unfortunately this flash occurred in between imaging sessions. No other flashes seen, despite looking. The observer considerd the possibility that it might have been a cosmic ray detection, but cannot say for sure. The ALPO/BAA TLP weight=1.
Bright point seen on the dark part. Cameron 1978 catalog ID is 38 and the weight assigned is 5.
On 1977 Apr 02 at UT22:00-00:00 L. Fitton (Shaw, Lancashire, UK, 8.5" reflector, x200, Wratten 25 and 44A filters, seeing II-III, transparency, good) noticed in Aristarchus, blue to the north west (IAU?) internal wall, also blue observed in other small bright objects against dark backgrounds. Lunar rotational axis and optical normal related such that the normal runs NW-SE (IAU?) through these features. Observer deduced that the coliur was obviously spurious and no blink was seen in any feature. The blue disappeared as the lunar altitude increased and no blue seen by 00:00UT. This is a BAA lunar section observation. The ALPO/BAA weight=1.
On 1988 Apr 01 atUT01:15-03:20 H.Hill (Lancaster, UK, 10" reflector, x286) observed that east of Lichtenberg were ëxtensive rosy areas" around the northern edge of the lava sheet. Hill believes that it may have been the same effect as seen by Madler (Germany), Barcroft (USA) and Baum's (UK) 1951 observation. The colour was "ünmistakable" and nothing to do with the atmospheric spurious colour. Other features were checked. the cameron 2006 catalog ID=322 and the weight=3. THe ALPO/BAA weight=2.
On 1892 May 10th at 19:00UT? Pickering, based at Arequipa. Peru, using a 12" reflector, saw varitions in vapor col. Drawings were made. Time calculated from the given colongitude. Cameron 1978 catalog ID= and weight=3. ALPO/BAA weight=2.
On 1992 Jan 18 at UT 22:34-23:48 A.C. Cook (Frimley, UK, 8" reflector, seeing=III) was able to see 4 craterlets and two rays on the floor of Plato. This was suprising because Moore, using a larger telescope and magnification, was unable to see any detail here on 1991 Dec 12th at 02:10 - according to Cameron. The Cameron 2006 catalog ID=438 and the weight=2. The ALPO/BAA weight=1.
Aristarchus 1982 Nov 29 UT 21:47 Observed by P. Madej (Huddersfield, UK) flashes seen to NW. ALPO/BAA weight=1.
Riccioli 1974 Jan 07 UT 16:30-17:00 Observed by McKay (South Downs, England, 3" refractor, x135, S=IV boiling) "Bright spot and dark patch changing in size (atmos. aberr. ?)" NASA catalog weight=1 (very low). NASA catalog ID #1385.
1969 Aug 26 UT 22:15-23:30 Observer: Whippey (Middlesex, UK, 6" reflector x177) "Small dark spot in oval whitish patch typoical under high sun for it." NASA catalog weight=2. NASA catalog ID #1200. ALPO/BAA weight=1.
Plato 1969 Aug 26 UTC 22:15-23:30 Observed by Whippey "Plato's defuse white patch in center flanked by two radial diffused bands diverging to S. wall. Later E. band disappeared under better seeing. NASA catalog weight=2. ALPO/BAA weight=1."
On 1960 Sep 04 at UT00:00? Miranova (Russia or Israel) observed a TLP at an unnamed lunar feature: "Spectral photom. of some lunar obj. in 4250, > 5000A bands. Spectral plates". Cameron suspects luminescence? The Cameron 1978 catalog ID=730 and weight=5. The ALPO/BAA weight=1.
During an eclipse of the Moon the crater appeared normal until it emerged from the shadow. In the north east the dark floor was not its normal hue and two light areas appeared to join. The emerging patches became less and less bright, finally disappearing at 0345 UT when the crater returned to normal. Cameron 2006 catalog extension ID=10 and weight=2. ALPO/BAA weight=2.
1963Dec29/30 UT 22:00-03:00. Doherty (Small Thorne, UK) 8.5" reflector, x110, x200 & x274, S=8-8.5, T=8, Moon 57 deg in alt) and 3 others, using the same instrument, saw a bright purple- blue patch in Aristarchus. Other areas checked for colour and none sen elsewhere. Attempts were made to contact observers elsewhere but with no success. Sketch made and shows the patch covering the floor area of Aristarchus and extending out beyond the east rim. Patch was elliptical in shape and the semi-major diameter was approximately 2/3rds of the diameter of Aristarchus, or about 27 km. The event lasted 5 hours and gradually faded. NASA catalog weight=5 (very high quality)". ALPO/BAA weight=4.
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.
Aristarchus 1966 Jun 03 UT 01:00-01:45 Observed by Gordon (2), Delano (Ackerman, PR?, 5" reflector / Massachussets, 3" (x92) & 10" reflector T=4) "Deep blue color on N. wall. S.part of crater was brownish, (not on alert). Delano saw E.wall bright spot unusually bright, confirm, ?" NASA catalog weight=5. NASA catalog ID #947. ALPO/BAA weight=3.
On 1877 Aug 23/24 at UT 23:10-01:00 Airy, Pratt and Capron (Greenwich, England, France) observed during a lunar eclipse an unusual spectrum with strong absorption in yellow. (Airy) 2 patches of crimson light of short duration. Cameron says that this is a confirmation observation and that Airy was the Astronomer Royal. The cameron 1978 catalog ID=197 and weight=5. The ALPO/BAA weight=4.
On 1964 Jun 25 at UT ~01:07 Titulaer (Utrecht, the Netherlands) observed that Aristarchus crater was very bright during an eclipse. The Cameron 1978 catalog ID=822 and weight=4. The ALPO/BAA weight=1.
On 1964 Jun 25 at UT ~01:07 Rubens de Azevedo (Brazil) observed a white streak from Grimaldi on the limb, during an eclipse. The Cameron 1978 catalog ID=822 and weight=4. The ALPO/BAA weight=2.
On 1982 Aug 04 at UT19:25 Arkhipov (Ukraine). found that for 3 minutes Aristarchus brightened. Cameron 2006 catalog ID=180 and weight=0. ALPO/BAA weight=1.
On 1982 Aug 04 at UT19:25 Arkhipov (Ukraine). found that for 5 minutes Copernicus flashes. Cameron 2006 catalog ID=180 and weight=0. ALPO/BAA weight=1.
Gauss 1967 Sep 19 UT 02:33 Observer: Chilton (Hamilton, ON, Canada, 12.5" Gregorian, 200x and a 4" refractor). In a polaroid filter the west wall was missing. Effect seen in large scope and also in 4-in finder. His conclusion was that W. wall reflected polarized light. Cameron 1978 catalog weight=3 (good) and TLP ID #1047. ALPO/BAA weight=4.
In 1950 Apr 02 at UT 20:00 Chernov (Russia) observed two dark spots in Atlas during a penumbral phase of a lunar eclipse to quickly darken and become sharp in detail. The cameron 1978 catalog ID=524 and weight=1. The ALPO/BAA weight=1.
On 1905 at Feb 19 at UT 18:00-19:03 Moye (Montpelier, France) observed Aristarchus shining as a star in the dark, during a lunar eclipse. The Cameron 1978 catalog ID=320 and he weight=3. The ALPO/BAA weight=3. The ALPO/BAA weight=2.
On 1960 Sep 04 at UT00:00? Miranova (Russia or Israel) observed a TLP at an unnamed lunar feature: "Spectral photom. of some lunar obj. in 4250, > 5000A bands. Spectral plates". Cameron suspects luminescence? The Cameron 1978 catalog ID=730 and weight=5. The ALPO/BAA weight=1.
On 1959 Mar 24 at UT 1851 Chernov (Russia) observed the follwing in Oceanus Procellarum during a lunar eclipse: "During penumbra of ecl. separate light pts. were sharply g?listing?. Possibly connected with transparancy of the penumbra. (time given was 0851 UT but must have been loc. time p.m. penum. phase started at 1756UT & umbral at 1916UT)". The cameron 1978 catalog ID=717 and weight=2. The ALPO/BAA weight=1.
On 1968 Apr 13 at UT05:00-05:45 Cameron and Laczo (Greenbelt, MD, USA, 6" refractor, x50, 36" reflector x400, 12" reflector x80, seeing= excellent) observed for the folliwing craters: Aristarchus, Pytheas, Euler?, Censorinus, Plinius?, Proclus, Menelaus, Manilius: "Star-like pts. in the craters. Only Aris. identified certainly, rest fairly certain except Euler & Plinius. Seen in 6-in refr. at 50x but not in 36-in refl. at 400x where they were bright, but not star-lie pts. Seen later in 12-in refl. at 80x. In another bldg. Seen 1st @ 1/2h before totality ended, but not earlier dur. tot. tho't by author (WSC) to be geom. & instrumental = power effect". Chilton, K.E. reports in RASCJ that another observer did not report any of what the Greenbelt observers saw at all?The Cameron 1978 catalog ID=1065 and weight=4. The ALPO/BAA weight=1.
On 1892 May 11 at 22:53UT an Unknown observer, during a partial eclipse noticed an extension of the Earth;s shadow beyond the north cusp. Cameron 1978 catalog ID=278 and weight=0. ALPO/BAA weight=1.
On 1892 May 11 at 22:53UT an Unknown observer, during a partial eclipse noticed an extension of the Earth's shadow beyond the south cusp. Cameron 1978 catalog ID=278 and weight=0. ALPO/BAA weight=1.
On 1975 Nov 18 at UT 19:38-23:34 Moore (Johannesburg, South Africa, 2" refractor, S=II), Peters (Kent, UK, 8.5" reflector, x120, S=IV), Good (Guilford, UK, binoculars), Foley (Dartford, Kent, UK, 12" reflector and photographs), and McKay (Kingston, England, UK, 6" reflector, x48) observed the following in Aristarchus during a lunar eclipse: "It appeared much fainter than ever before seen in ecl. by Moore. Fainter than Proc., Cop., & Tycho. Others rated brightness in order-- Hell, Stevinus, Furnerius, proc.; & Proc., Tycho, Hell, Aris. Photos confirmed dimness of it. For some observers it became invis. at S=II (good). Good ranked at least 4 other craters brighter than Aris. & that at 2035h it dimmed. Earthshine cond. extraordinarily good. Peters, at S=IV (fair?) rated Aris. brightest". At 23:50UT LeCroy Jr and Sr (Springfield, VA, 4.5" reflector, S=7) observed four glowing spots on the Moon during a lunar eclipse (including Aristarchus). At 23:50UT Aristarchus was an oval shape with no details seen. It had a ray extending from the south west rim (normal). The north rim was slightly blue and the south west rim very very slightly red. At 23:55UT it was clearing and details showed. At 00:02UT it was clear. Sketches were provided. Cameron comments that the colours fit Fitton's predictions on spectral dispersion in our atmosphere from atmospheric inversions. The brightness measued was 10+ and normal should be 9, and the plain is 4.5. The Moon's altitude at the LeCroy site was 45 deg. The Cameron 1978 catalog ID=1418-1420 and weight=5 (1-0 for LeCroy report). The ALPO/BAA weight=3.
Aristarchus 1974 Jan 08/09 UT i18:15-00:00 Observed by Billington (England), Robinson (Devon, England), Amery (REading, England), Moore (Selsey, England) "Orange & viol. hue in crater seen by Billington. Robinson, Amery & Moore reported neg. blink results at this time. (Prob. chrom. aberr., Moore concurs)." NASA catalog weight=0. NASA catalog ID #1386. ALPO/BAA weight=1.
On 1989 Aug 17 at UT 01:02-04:20 G. Kolvos (Thesaloniki, Greece, 4"reflector) measured (using photometry) that although there was a gradual fade over the Moon as the eclipse progressed, there was a 2"% rise in brightness of Aristarchus.Graphs were submitted and photos. A.C. Cook supplied CCD images and CCD photometry. A photograph by Conway (Sun Prarie, WI, USA) at the start of the eclipse reveal a bright colourless spot (aparently confirmed). The Cameron 2006 catalog ID=373 and weight=5. The ALPO/BAA weight=2.
In 1935 Jul 16 at UT 05:01 deWitt (Nashville, Tennessee, USA, 12" reflector) "Photos in lunar ecl. indicate a probable fading of Grim. floor a possible fading of S. tip of Ricc. spot, a possible enlargement of halo around Linne, a possible, but unlikely darkening of Schick's dark areas & no effect on Eratosthenes or white spot E. of Webb. Linne enlargement more pronounced at 1902 ecl. than at any other time. Fading of Ric. spot was pronounced on May 14, 1938". The Cameron 1978 catalog ID=413 and weight=5. The ALPO/BAA weight=3.
In 1902 Oct 17 at UT 04:35-06:00 Seen by S.J. Johson and also in another report(s) by Brink, Swift, Wilson () observed a "Dark band, no color, across center of moon dur. ecl. Copernicus brighter than Tycho. Aristarchus brightest of all. Drawing by Brink & Wilson at 1725(=0525UT)(Confirm. -- time given=16th at 1635-1800 = 17th at 0435-0600 on present UT system". The Cameron 1978 vatalog ID=314 and weight=5. The ALPO/BAA weight=3.
In 1921 Oct 16 at UT 22:00-00:00 Genin and others (Russia) observed during a partial eclipse that different parts of Aristarchus crater had brightness of phosphorecence. Cameron says that this is independent confirmation. The Cameron 1978 catalog ID=383 and weight=5. The ALPO/BAA weight=3.
On 1971 Aug 06 at UT 20:30 Chernov (Crimea?, Ukraine, Soviet Union) observed a dark spot in Riccioli that was very dark for 3 minutes, before coming out of shadow - however the dimensions were normal. This was during the lunar eclipse. The Cameron 1978 catalog ID=1305 and weight=3. The ALPO/BAA weight=1.
On 1884 Oct 04 at UT 22:00 Bye (Brussels, Belgium) observed during an eclipse that the peaks were visible as brilliant points with slight red aureoles during a lunar eclipse. Cameron says that this was a confirmation of #2443. The Cameron 1978 catalog ID= and the weight=5. The ALPO/BAA weight=2.
Parsehlan of England? saw Tycho as a 2nd magnitude star during a total lunar eclipse. The Cameron 1978 catalog ID=244 and weight=5. The ALPO/BAA weight=3.
On 1970 Aug 12 at UT21:00? an unknown observer commented about Plato: "Light #22, remarkable increase in brightness. #32 subsided & #14 shone out then faded & #16 brightened. (Fort says that till Apr. 1871 selenog recorded 1600 obs. of fluctuations of lights in Plato & had drawn 37 graphs of indiv. lights. These were deposited in the library of the Royal Astronomical Society by Birt)." The Cameron 1978 catalog ID=169 and the weight=3. The ALPO/BAA weight=2.
On 1988 Apr 03 at UT02:25-02:30 Culver (Harker Heights, X, USA, Meade 2045 reflector, x40, seeing=turbulent) detected flashes coming from just north of the centre of Mare Tranquilitatis. Some of these flashes were of a duration of seconds whilst others were several minutes. Altogether ~20 flashes were seen, and not in the same place. "5 small star-like points could be located - and there were lots of craterlets". The spots were "lined up E-W at N of 10 deg latitude." Colour was not visible on these nor variations. Apparently the observer had seen this type of TLP before but had not reported them. The Cameron 2006 catalog ID=323 and weight=2. the ALPO/BAA weight=2.
On 1992 Jan 20/21 at UT 23:49-00:15 M.C. Cook (Frimley, UK, 3" Questar telescope, x130, seeing=III) managed to see the central craterlet in Plato and an unnamed one north west of Mons Pico. Cameron comments - "were this & No. 429 LTP or just good seeing?)." Note it is possible that she mean LTP 439 in which case it would refer to the previous nights TLP. The Cameron 2006 catalog ID=439 and the weight=2. The ALPO/BAA weight=1.
Aristarchus & A 1965 Nov 10 UTC 01:25-01:57 Observed by Bartlett (Baltimore, MD, USA, 4" reflector, S=6, T=6) "Viol. tinge & radiance around nimbus; used red filter. Aris. A became larger." NASA catalog weight=4 (high). NASA catalog ID #913.
On 1975 Mar 27 at UT22:30-01:45 P.W. Foley (Wilmington, Dartford, Kent, UK, 30cm Newtownian) observed blueness along the inner southern wall of Plato. This is a BAA report. The ALPO/BAA weight=1.
On 1975 Mar 28 at UT22:30-23:42 P.W. Foley (Kent, UK) observed orange/red in Aristarchus. The ALPO/BAA weight=1.
On 1989 Feb 22 at UT03:48-03:58 D. Darling (Sun Praire, WI, USA, 3" refractor, x56, seeing=4/10 and transparency=4) found that the floor of Proclus was a "uniform grey" shade and the east wall was bright. The Cameron 2006 catalog ID=357 and the weight=2. The ALPO/BAA weight=1.
Heraclides Point 1948 Oct 19 UTC 22:00 Observed by Moore (England, 12" reflector?) "Blurred, misty -- La Place was sharp. White diffused bright spot in S. Iridum close to Heraclides pt." NASA catalog weight=4 (high). NASA catalog ID #512.
On 1984 Nov 10 at UT19:15-19:50 R. Moseley (Coventry, UK, the Moon's altitude was low) noticed that the region from the central peak and over and onto the east wall looked unusual. 8 bands were visible, "two on E. wall of c.p. strongest, surrounding collar grey increasing intensely outward. Band at 2 o'clock position was very dark. Bright spot on W. wall at 4 o'clock position." A sketch was made that illustrates bands on either side with bright patch. The Cameron 2006 catalog ID=252 and the weight=2. The ALPO/BAA weight=2.
On 1988 Jul 31 at UT 07:09-08:10 D. Darling (Sun Prairie, WI, USA, 12.5"reflector, seeing=7/10 and T=3) did not detect the dark region on the south east floor of Proclus (the TLP from a few days earlier), but did see 2 "linear mounds". The Cameron 2006 catalog ID=335 and the weight=0. The ALPO/BAA weight=1.
On 2011 Jan 21 at 22:30UT N.Longshaw (UK, 4" Achromatic refractor, x128 & x160, Seeing III, transparancy average) suspected on the eastern edge of Geminus, on the border of the crater filled shadow and the eastern illuminated rim, a brownish, almost speia hue. This extended for a short distance from the floor shadow into the illuminated rim width and spanned from the north to the south of the crater. For a comparison, Cleomedes was checked but nothing unusual was noticed in its shadow. The observer notes that Elger also saw a warm brown or sepia tone. ALPO/BAA weight=1.
Posidonius 1849 Feb 11 UT 02:00? Observed by Schmidt (Athens, Greece, 7" refractor) "Bright little crater in it was shadowless. Schroter saw repeated changes in it & others & once saw this crater's shadow replaced by a gray veil. Gruithuisen saw the same thing as Schroter in 1821." NASA catalog weight=4 (high). NASA catalog ID #128. ALPO/BAA weight=3.
Aristarchus 1975 Nov 18-19 UT 23:30-00:30? Observed by Foley (Kent, England, 12" reflector) "Deep blue-viol. spot in NW (IAU ?) interior corner. (seen occasionally with obscur. but dates not given)." NASA catalog weight=3 (average). NASA catalog ID #1421."
On 1984 Nov 11 at UT21:00? Marshall (England) noted that there was no normal brightness on the floor to most southernmost craterlet. The Cameron 2006 catalog ID=253 and the weight=2. The ALPO/BAA weight=1.
On 1992 May 20 at UT 11:15 D. Weier (Sun Prairie, WI, USA, naked eye and 7x50 binouculars, sky conditions excellent) noted that Aristarchus and, an area, were very bright to the eye. In binouculars the feature was quire sharp and distinct, "> anything else on the Moon". The Cameron 2006 catalog ID=447 and the weight=2. The ALPO/bAA weight=1.
On 1980 Aug 29 at UT07:32 D. Loudernack (South Bend, WA, USA, 8" reflector, x140) found the south wall to have a broad dark band (only visible in red light) at its base that covered nearly all of the southern half of the crater. The brightness reading was 8.4 (in blue light) and 4 (in red light). Cameron 2006 catalog ID=107 and weight=3. ALPO/BAA weight=3.
On 1958 Nov 01 at UT 00:00 a TLP was seen on the Moon (location and observer not given). The Reference for this is Palm, 1967. The Cameron 1978 catalog ID=702 and weight=0. The ALPO/BAA weight=1.
On 1964 Jun 29 at UT 07:05-07:33 Bartlett (Baltimore, MD, USA, 4" reflector x240, S=5, T=4) suspected a violet glare? on the EWBS of Aristarchus, but was too faint to be certain. The bright art of the floor was granulated and had a ceppery tint. The Cameron 1978 catalog ID=827 and weight=4. The ALPO/BAA weight=2.
Aristarchus-Herodotus 1967 May 29 UT 06:40-07:25 Observed by Anderson (Manchester, N.Hampshire, 10" reflector, x212, S=G, T=E) "After timing sunset on Theophilus & Cyrillus turned to Aris.-Herod. At 0640 saw red- brown color centered at ?=.685, eta=+.390. Glow strongest at largest area at 0640. Decreased in area but not in intensity to 1/2 its size at 0648. At 0650 color gone. Seen again at 0658 but not so pronounced. Faded out at 0700, obs. terminated at 0725. (Haas thinks it might have been atm. dispersion at such low alt. of 12-17 deg)." NASA catalog weight=1. NASA catalog ID #1038. ALPO/BAA weight=1.
On 1981 Dec 16 at UT 17:45 B.W. Chapman, Kingston-Upon-Thames, UK, 11.5cm refractor, seeing II, trasnparency Fair) found the east outer ridge brighter in red - inclined to blue. The ALPO/BAA weight=1.
On 1981 Dec 16 at UT 17:45 B.W. Chapman, Kingston-Upon-Thames, UK, 11.5cm refractor, seeing II, trasnparency Fair) found the west inner ridge lighter in red, and so to the east and south- west floor. The ALPO/BAA weight=1.
On 1964 Jun 30 at UT 05:50-06:10 Bartlett (Baltimore, MD, USA) observed the following in Aristarchus: "Nimbus only -- dark viol. hue. S. part of Aris. floor was granualated & a brown tinge -- changed to yellow & a brown tinge at 0500. First time he ever saw such a change in color. (this obs.listed in 210 & MBMW as June 20, but is a misprint)". The Cameron 1978 catalog ID=828 and weight=4. The ALPO/BAA weight=3.
Near Calippus 1973 Jan 25 UT 19:20-19:30 Observed by Frank (E.Pepperell, Massachusetts, USA, 6" reflector, x100, S=G) "Bright spot nr. Calippus. Sketch (Calippus alpha, or unnamed peak N. of it?). Est. albedo=8.5 & surroundings at 0.5 at 1015h. Obj. not noticeable at all during 1st 1/2 cycle thru FM in Dec. & Jan. (ALPO-LTP prog.)" NASA catalog weight=0 (very unreliable). NASA catalog ID #1360.
White spot in Walter 1973 Jan 25 UT 19:20-19:39 Observed by Frank (E.Pepperell, Massachusetts, USA, 6" reflector, x100, S=G) "White spot in Walter barely distinct fr. surroundings & crater rim. It's albedo=8, surroundings=7 (ALPO-LTP prog.)" NASA catalog weight=3. NASA catalog ID #1360. ALPO/BAA weight=2.
Aristarchus 1976 Nov 13 UT 05:25 Observed by Bartlett (Baltimore, MD, USA, 3" refractor, 54-200x, S=6, T=4) "Floor 8deg except S.=6deg which is also granulated & la pale yellow. Different aspect fr. other obs. at same col. Viol. in outer nimbus. Bright blue-viol. glare where viol. radiance was on 11th. SWBS still large & 9 deg bright." NASA catalog weight=4 (high). NASA catalog ID #1457.
Aristarchus 1976 Nov 14 UT 06:09 Observed by Bartlett (Baltimore, MD, USA, 3" refractor, 54-200x, S=5-4, T=5) "Walls & floor 8deg except S.= 6deg, SWBS now smaller but still 9deg. S.floor still granulated & now yellow-brown. Strong viol. tint still on outer nimbus but now viol. radiance (gas?) again on ENE rim as on 11th, but not as on 13th" NASA catalog weight=4 (high). NASA catalog ID #1458.
On 1994 Jan 04 at UT21:00 J. Nibbering (Rosendaal, Netherlands) obtained a photograph that shows a large crescent of light centred on Tycho crater, but includes also: Lilius, but not to Clavius. Cameron suspects strongly that it was caused by camera lens flare. The Cameron 2006 catalog ID=471 and the weight=5. The ALPO/BAA weight=1.
On 1882 Apr 11 at UT 21:00 Williams (England, 6.5" reflector) observed Plato at sunset (date Cameron gives is calculated from #229) and saw a curious phosphorescent glimmer in the crater where he had seen a luminous milky appearance before. at sunrise. The cameron 1978 catalog ID=230 and weight=3. The ALPO/BAA weight=3.
Aristarchus 1976 Nov 16 UT 06:15 Observed by Bartlett (Baltimore, MD, USA, 3" refractor, 54-200x, S=4, T=5) "Crater very dull except EWBS= 9deg & large. W.glacis=5deg & inner E.wall 6deg. Floor is dull 5deg, c.p.=10 deg. SWBS has disappeared. No viol. anywhere" NASA catalog weight=4 (high). NASA catalog ID #1460.
On 1821 July 25 at UT 03:30 Gruithuisen (Munich, Germany) observed, near Aristarchus, some brilliant flashing spots on the Earthlit side of the Moon. These disappeared after a short while then re-appeared. The Cameron 1978 catalog ID=90 and weight=4. The ALPo/BAA weight=3.
Southern cusp obseved by H.Hill (UK) on 1985 Sep 12 UT0435-0455. Solar Selenographic colongitude=241.3. Observer saw an extremely attenuated cusp extending well beyonf the Moon's prime meridian. There were also dusky ill-defined stips along the Earthlit limb nearby. Note that this is almost certianly not a TLP but is worth checking out if the libration and solar colongitude is similar, just to verify that this is what the Moon normally looks like. ALPO/BAA weight=1.
On 1788 May 08/09 at UT 20:00-01:00? Mechain (France) observed bright spots near Aristarchus. This was confirmed by Schroter and Bode (Lilienthal, Germany, 7" reflector and refractor). The Cameron 1978 catalog weight=5 and ID=46 & 47. The ALPO/BAA weight=4.
On 1990 Mar 29 at UT 19:00 L. Todd (England?) observed that Aristarchus in Earthshine was very clearly seen and appeared to blink occasionally. Foley (Kent, UK) also notcied variations in Aristarchus. The Cameron 2006 catalog ID = 396 and the weight=1. The ALPO/BAA weight=1.
On 1992 Jun 04 at 01:28UT whilst driving home K.Jenks (NASA JSC) observed with the naked eye a bright flash near to and slighly south east of the middle of the Moon. ALPO/BAA weight=1.
On 1988 Apr 20 at UT02:06-03:00 D. Fryback (Madison, WI, USA, 8" reflector, S=3-4) commented that Aristarchus crater looked like a "city from high above "glowing under a cloud". Spain (Fairfield, KY, USA, 8" reflector, S=VG) detected a streak and flashes but reports that the crater was not "glowing", though it was the brightest feature in the Earthshine, but Kepler and Copernicus were bright too. Aristarchus was brighter in shorter exposures than in longer exposures. The Cameron 2006 catalog ID=326 and weight="confirmed". The ALPO/BAA weight=2.
On 1969 May 20 at UT 19:35-20:30 Gomez (Spain, 12" reflector) observed blue-white pulsating light in Aristarchus that illuminated the inner walls - it was maximum at 19:55UT. This observation was made during the Apollo 10 watch. The Cameron 1978 catalog ID=1128 and weight=5. The ALPO/BAA weight=2.
On 1969 May 20 at UT 21:00-22:00 Bury (France, 4" refractor) observed Aristarchus to be very bright, as an elliptical bluish spot at 21:00UT. This observation was made during the Apollo 10 watch. The Cameron 1978 catalog ID=1128 and weight=5. The ALPO/BAA weight=2.
On 1978 Mar 13 at 17:25UT V.M. Chernov (Soviet Union) observed that the northern cusp was elongated into Earthshine, 4.6 days after New Moon. One day before this the cusps appeared nromal to him. The ALPO/BAA weight=1.
On 1988 Apr 21 at UT 01:28-04:00 D. Fryback (Madison, WI, USA) took a series of photographs - Aristarchus was a luminous patch and in one photograph a red spot (Cameron suspects marks on the film). is seen near Aristarchus. Strangely though when looking through the telescope, the crater was not excessively bright. D. Spain (Fairdale, KY, USA, 3.5" reflector?, x60) observed a narrow white streak of mag 5-6 of duration 0.5 sec that covered 160-320km near the centre of the Moon at 01:53UT. A similar streak happened but the direction was different. Next 2 small red flashes were seen at 02:00 and 02:01UT of magnitude 7 (<1sec) in the vicinity of Aristarchus. The cameron 2006 catalog ID=327 and the weight=1.
On 1988 Apr 21 at UT 01:53 D. Spain (Fairdale, KY, USA, 3.5" reflector?, x60) observed a narrow white streak of mag 5-6 of duration 0.5 sec that covered 160-320km near the centre of the Moon at 01:53UT. A similar streak happened again but the direction was different. Next 2 small red flashes were seen at 02:00 and 02:01UT of magnitude 7 (<1sec) in the vicinity of Aristarchus. The Cameron 2006 catalog ID=327 and the weight=1.
On 1969 May 20 at UT 21:10-22:30 Marcomede Rangel Nunes and Julio Dias Nogueira (Rio de Janeiro, Brazil, 18" refractor) Harpalus brighter than Bouguer - this was during the Apollo 10 watch and Cameron comments that the observers were inexperienced. The Cameron 1978 catalog ID=1129 and weight=0. The ALPO/BAA weight=1.
1951 Apr 11 UT 02:39:30+/-15s L.T.Johnson (USA) observed a mag 7 flash S ofGrimaldi. ALPO/BAA weight=1.
In 1933 Mar 30 at UT 20:00 Douillet (France?) observed in the Aristarchus region: "White. (in the dark part)". The Cameron 1978 catalog ID=404 and the weight=2. The ALPO/BAA weight=1.
On 1968 May 02 at UT 01:20-02:14 Doughty (Red Bank, New Jersey, USA, 8" reflector, x120) observed a bright area in Aristarchus, surrounded by a faint glow. May have been atmospheric dispersion. Glow fainter at 01:56UT and imperceptible at 02:14UT. Kelsey and Ricker consider the observation abnormal. The Cameron 1978 catalog ID=1070 and weight=3. The ALPO/BAA weight=2.
On 1969 Jul 19 at UT 1845-18:47 Pruss and Witte (Bochum, Germany, 6" refractor x36 and binoculars) saw brightenings in the north west wall of Aristarchus for 3-7 seconds of about 1 magnitude over the background. From orbit at UT 18:46 the Apollo 11 crew Armstrong, Aldrin, and Collins (in orbit around the Moon and using the naked eye) were asked to take a look at Aristarchus after Earth-based reports of TLP activity. Armstrong reported (after the solar corona had set, on the night side) that probably Aristarchus "to be considerably more illuminated than the surrounding area. It just has - seem to have, a slight amount of flourescence to it". Collins reported a moment later: "Looking out on the same area now. Well at least there is one wall of the crater that seems to be more illuminated than the others. I am not sure that I am actually identifying any phosporesecence, but that definitely is lighter than anything else in the neighborhood". Houston then asked if the crew could detect any colour and if the inner wall was the inner or outer part? Aldrim commnted that it was the inner wall and Collins mentioned thatno colour was incolved. The Cameron 1978 catalog ID=1165 and weight=5. The ALPO/BAA weight=3.
On 1969 May 21 at UT 20:00-21:00 Brandli and Germann (Switzerland, 6" refractor) observed a slow orange-red blinking on the surrounding area of Aristarchus. It was seen less markedly the next night. Wald (Zurich, Switzerland) noted at 20:30UT that the crater was pink (Confirmation says Cameron) - this was during the Apollo 10 watch. The cameron 1978 catalog ID=1131-1132 and weight=5. The ALPO/BAA weight=4.
South Cusp 1969 Jul 19 UT 17:55-19:10 Observed by Dzapiashvili (Georgia, Soviet Union) "Saw an abnormally bright spot at end of S.cusp. Polariz. meas. at 8.3% at 1845-1847h (Apollo 11 watch?)" NASA catalog weight=5 (very good). NASA catalog ID #1164.
On 1969 Jul 19 at UT 19:30-21:30 Gervais (Lodure, France, 4.5" refractor?) saw the whole region of Aristarchus and its environs as brighter than normal. Two photographs were obtained. The Cameron 1978 catalog ID=1156 and weight=5. At UT 20:30-20:55 Oliver (Spain, using a reflector) found the Aristarchus to have brightened by about 1 magnitude. From UT 20:12-20:30 the crater had been normal. The Cameron 1978 catalog ID=1167 and the weight=2. At UT 21:00-00:35 P. Mourilhe Silva (Rio de Janeiro, Brazil, 19.5" refractor) saw Aristarchus as a very bright elliptical shape which extended to the north like a bridge between two points. Jose M. L. da Silva and Ronaldo Mourao (Rio de Janeiro, Brazil, 13" refractor) saw a brightening on the north west wall from 21:24-23:22UT intermittently but cont'd. Wall was extraordinarilly bright, along NW wall brighter. Moseley (Armagh, Northern Ireland, UK, 10" refractor) detected an unusual bright, along north west wall, brighter than normal in Earthshine and brighter than crater. It was not constant, but pulsated irregularly with frequency of 20 seconds and amplitude 0.75-1.0 magnitudes. No colour seen or obscuration though lokked for. Clouds interrupted observations. Vasquez (Valparaiso, Chile, 12" reflector) saw it as a very luminous point of magnitude 1. Wairy Cardoso (Rio de Janeiro, Brazil, 12" reflector and 18" refractor) noted a bright. 1s??? The Cameron catalog ID=1168 and the weight=5. The ALPO/BAA weight=4.
Theophilus 1969 Jul 19 UT 19:30-21:30 Observed by Fox (Notts. England, 6.5" reflector) and Ringsdore (England, 15" reflector). Fox saw intermittent glow in Theoph. for > 2h (time not given). Ringsdore confirmed. (Apollo 11 watch)" Confirmed by Baum 21:00-21:20UT. NASA catalog weight=5. NASA catalog ID No. 1166. ALPO/BAA weight=4.
On 1966 Sep 20 at UT 03:22 Three Astronet observers (Phoenix, AZ, and Los Angeles, CA, USA) (independently?) reported flashes in Grimaldi crater. One observer was in Phoenix AZ, and another in Losa Angeles, CA, so probably not due to the atmosphere. Cameron comments that the astronaut Schmidt on Apollo 17 saw a flash in it while orbiting the Moon. the Cameron 1978 catalog ID=977 and the weight=5. The ALPO/BAA weight=4.
Mare Crisium 1826 Apr 12 UT 20:00 Observed by Emmett (England?) "Black moving haze or cloud". NASA catalog weight=2 (low). NASA catalog ID 109. ALPO/BAA weight=1.
On 1992 Dec 29 at UT 17:42-17:54 A. Dollfus (Meudon, France, 1m aperture telescope used) detected evidence for a dust cloud using CCD polarimetry. The ALPO/BAA weight=5.
On 1975 Dec 08 at UT18:00-20:40 P.W. Foley (Wilmington, Kent, UK, 12" reflector, x60-x624, seeing II, slight mist) found Aristarchus to be less well visible than features such as: Grimaldi, Reiner, Darwin/Byrgius, Kepler, Plato and Sinus Iridum. Earthshine was exceptionally good tonight and was orange/red in colour. Photographs were taken and these confirmed the apparent dullness of Aristarchus. ALPO/BAA weight=2.
Grimaldi 1969 Jul 19 UT 20:39-20:45 Delaye (France, 25cm refractor) saw a bright bluish spot near Grimaldi. 20:43 a flash was seen by Thinon. Delaye saw flashes at 20:44 and 20:45. Between 21:00 and 23:00 (J. M. L.) da Silva (Rio de Janeiro, Brazil, 19.5" refractor) saw a bright spot on the W (IAU??) of Grimaldi. However there is a bright spot near Grimaldi, so this maybe normal. NASA ID = 1167. The ALPO/BAA weight=2.
Theophilus 1969 Jul 20 UT 18:40 Observed by Delaye, Thinon, Donas, ? ourdan (Marseilles, France, 10" refractor x60) "Saw a flash on the c.p. of mag 1.0, duration 0.1s, no color. (meteor?) (Apollo 11 watch)". NASA catalog weight=1 (very low). NASA catalog ID #1174.
On 1984 Jul 04 UT 22:08-23:09 Foley (12" reflector, Kent, UK) found that Censorinus gave a low brightness CED reading of 58%, despite all other measured points on the Moon as being normal. M. Cook (Frimley, UK) found Censorinus to be extremely dull compared to Proclus. J.D. Cook (Frimley, UK) found Censorinus to be quite dull, barely above background levels. The Cameron 2006 catalog ID=246 and the weight=4. The ALPO/BAA weight=3.
On 1984 Jul 05 at UT 00:00-01:25 Marshall (Medelin, Columbia, seeing=II) observed that Censorinus was much less bright than Proclus (confirmed by CED readings). Cameron 2006 catalog ID=247 and weight=3. ALPO/BAA weight=1.
On 1984 Jul 05 at UT 00:00-01:25 Marshall (Medelin, Columbia) found Proclus to be much brighter than Censorinus (which of the two was abnormal is a question) - though he thought that Censorinus looked dull. The Cameron 2006 catalog ID=247 and weight=3. The ALPO/BAA weight=1.
On 1984 Jul 04 at UT 22:05-23:09 Richardson (Swinton, Yorkshire, UK, seeing=VE) found that a peak west of Theophilus crater had a deep blue colour, and this was strange because no colour was seen elsewhere on the Moon. Foley (Kent, UK, 12" reflector), once alerted, found a dome east of Kant? to be blue, and likewise no colour was seen elsewhere on the Moon. Cameron 2006 catalog ID=246 and the weight=4. The ALPO/BAA weight=3.
On 1984 Jul 04 UT 22:08-23:09 Foley (12" reflector, Kent, UK) found that Torricelli B was a much lower brightness than was expected and this remained the case for the rest of the lunation. The Cameron 2006 catalog ID=246 and the weight=4. The ALPO/BAA weight=1.
On 1969 May22 at UT2045-2105 Wald (Zurich, Switzerland) observed the pinkish colour in Aristarchus was less marked tonight. The astronauts were alerted and at 22:12 reported no activity but could see the crater and Earthshine was strong near the terminator. Apollo 10 watch, spacecraft far from the terminator. The Cameron 1978 catalog ID=1134 and the weight=2. The ALPO/BAA weight=2.
Atlas 1969 May 22 UT 21:20-21:40 Observed by Germann, Wild, Vieli (Zurich, Switzerland, 6" reflector) "Rim towards the sun was bright. Part of time was interrupted. (Apollo 10 watch)" NASA catalog weight=3 (average). NASA catalog ID #1135.
Mare Crisium 1826 Apr 13 UT 20:00 Observed by Emmett (England?) "Black moving haze or cloud" NASA catalog weight=2 (low). NASA catalog ID = 109. ALPO/BAA weight=1.
On 1969 Jul 20 at UT 19:55-20:10 Delaye, Thinon, Donas, and Jourdran (Marseilles, France, 10" refractor, x60) saw between 19:55-20:04UT Aristarchus to be bright and in it pulsations with 10 sec duration. At 20:05UT it's spot brightened, at 20:08:50-20:35:50UT brightening and pulsations of variable duration. At 20:55:50UT just a feeble flash. Cameron comments that this is probably not atmpsheric effects as the period is too long - also it was during the Apollo 11 watch. The Cameron 1978 catalog ID=1175 and th weight=3. The ALPO/BAA weight=3.
On 1992 Dec 30 at UT 17:36 A. Dollfus (Meudon, France, 1m aperture telescope used) detected evidence for a dust cloud using CCD polarimetry. The ALPO/BAA weight=5.
Knopp of Paysandu, Uruguay on 1885 Feb 21 at 23:00-23:30? UT saw red patches in the crater. Reddish smoke or mist. The observer says several others had seen a star like point there that night. Cameron's 1978 catalog ID=348 and weight=4. ALPO/BAA weight=3.
Triesnecker Rille 1912 May 23 UT 18:00? Observed by Gordeenko (Russia) "Change in shape from representation by Brenner and Krieger not accountable by lighting conditions" NASA catalog weight=0. ALPO/BAA weight=1. NASA catalog ID #339.
Censorinus 1984 Jul 05 UT 21:05-21:25 Observed by Cook (24" reflector with line scan photodiode array at Mill Hill observatory, London) "Two line scan photodiode array images were taken which used the motion of the Moon to build up an image. The first image at 21:25UT did not include all of Censorinus, but the part that it did include was not very bright. The 21:25UT image did include all of Censorinus and the crater was bright, including the part that was just visible in the previous image. Possibly the seeing was worse at 21:05? and this could explain the brightness descrepency, but it is worth checking again by taking images at the same illumination conditions" BAA Lunar Section report. At 21:17 M. Cook (Frimley, UK) found Proclus to be brighter than Censorinus (more so than the previous night) and obtained variable readings for Censorinus. Cameron 2006 catalog ID=247 and weight=3. ALPO/BAA weight=2.
Theophilus 1969 Jul 21 UT 19:30-21:45 and 21:00-22:00 Observed by Fox (Newark, England, 6.5" reflector,) and Baum (Chester, England, 4.5" refractor) (S=6, T=4) "At wall, adjacent to Cyrillus was a redish glow, then obscur. (Fox). Baum saw intermittant white-blue shimmering as if glowing thru dust glowing & upsurge in brightness on c.p. Gradually faded to normal at 21:20. 1st time ever seen by him tho. obs. since 1947. Image sharp, no haziness. (indep. confirm. of activity, but details differ, but same time, Apollo 11 watch)." NASA catalog weight=5. NASA catalog ID #1180. ALPO/BAA weight=3.
On 1991 May 21 at UT05:30-06:15 J. Green (Orangevale, CA, USA, 11" reflector) photgrapphed a broad bright band stretching east and north of Cassini crater in 3 exposures taken 10 minutes apart. This photographic sequence shows a gradual widening towards Cassini and by the 3rd exposure the band is touching (and then obscuring) Cassini. A "fan" was visible in the north east and WSW directions, later this was seen as rays and this was even seen in the view finder of the camera. Cameron comments that this might be lens flare but suspects that it would not have been seen in the view finder. The Cameron 2006 catalog ID=427 and the weight=5. The ALPO/BAA weight=2.
Messier 1968 May 05 UT 01:35-03:35 Observed by Delano (USA). No oclour noticed with Moon blink device, but Messier A's W. wall did brighten slightly over the 2 hours of observations compared to Messier's W wall. The ffect was less marked in the 2nd hour. ALPO/BAA weight=1.
North of Bessel 1969 May 1969 May 23 UT 22:54. Nelson Travnik (Observatorio Flammarion, located at 45.58W, 21.87S, f/15 10cm refractor, Kodak Tri-X, 1/15 sec exposure, sky conditions excellent). Dark spot photographed just north of Bessel - could be a photographic defect?. ALPO/BAA weight=1.
Piton 1970 Apr 13 UT 22:06-01:30 Observed by Cutts (Waverton, UK) "Peak was bright (Apollo 13 watch. Shining in dark?)" NASA catalog weight=1. NASA catalog ID #1247. Similar illumination shown on Hatfield Plate 2E(left). ALPO/BAA weight=1.
On 1871 Nov 20 at UT 17:30-19:30 H. Pratt (UK) saw one of the most spectacular TLP obscurations that he had ever seen in Mare Frigoras. He observed a kind of haze around the north west (NE?) slopes of Plato. This effect was not seen elsewhere and all objects in Mare Frigoris were indistinct or veiled. By 18:30 the effect was modified and by 19:30 very little trace was seen. Ref. from Corliss.
Knopp of Paysandu, Uruguay on 1885 Feb 22 at 23:00-23:30? UT saw a definite light, looking like Saturn in Cassini?. The previous night he had seen red patches in the crater. Cameron's 1978 catalog ID=348 and weight=4. ALPO/BAA weight=3.
Plato 1895 May 02 UT 20:45, 23:45 Observed by Brenner and Fauth (Germany?) "Streaks of light (Brenner) bright parallel bands in center Fauth (indep. confirmation?)." NASA catalog weight=5. NASA catalog ID #284. ALPO/BAA weight=1.
On 1979 Dec 27 at UT 05:32 D. Louderback (South Bend, WA, USA, 6" reflector x240, seeing=3-6/10 and T=4) noticed "2 small high-sun areas nr. Eimmart - brightening around Mare Crisium, except for interior of Proclus - in blue light. They were brighter than 2 spots on Cap. Agarum rated 8.5 & Proc. 9. Not as bright next night. Probably a real blue light brightening". Cameron 2006 catalog ID=79, location on Moon: (70E, 23N) and weight=4.
Censorinus 1969 May 24 UTC 21:10-22:15 Observed by Jean Nicolini (Sao Paulo, Brazil, 12" reflector) "It was brighter than Proclus between 2130-2145h. A very tiny cirrus veil present & Censor. appeared less bright & Proc. continued to look normal. Weather worsened at 2215h. (Apollo 10 watch)." NASA catalog weight=2. NASA catalog ID #1144. ALPO/BAA weight=1.
Theophilus 1978 Nov 08 UT 20:49-22:00 Observed by J.D. Cook (Frimley, 12" reflector, 6mm Ortho eyepiece, seeing III-IV) Orange discolouration seen on ESE crater floor. Moon blink tried, but no blink detected. By 21:10 the effect had lessened, but was still orange. By 21:50-21:58 the effect was smaller and perhaps more on the SE of the floor. Colour confirmed by Foley. Fitton may also have been observing. At 22:00 A.C. Cook observed and commented that a darkish, perhaps brown-orange colour seen - but suspected it was probably spurious colour - but by now the seeing was V. J.H. Robinson, whilst doing a Moon Blink sweep of several features, including Theophilus, had not noticed anything unusual 18:50-19:10. By 22:30-22:35UT, he still could not detect a blink, but noticed intermittent darkining on the shaded area on the E. floor, but seeing was now IV. The darkening was more noticeable in blue than red light. BAA Lunar Section observation. 2006 Cameron catalog ID #40 weight=3. ALPO/BAA weight=1.
On 1972 Feb 23 at UT0010-0035 Fornarucci (Garfield, NJ, USA, 6" reflector, x250, seeing=fair and transparency=3.5). Shading usually visible west of it was not seen. Cameon comments that the albedo must have been at 5, where normally it is 4.5 and the nearby plain is 5). Cameron 1978 catalog ID=1322 and weight=2. ALPO/BAA weight=2.
Fracastorius 1975 Apr 19 UT 19:47, 20:40, 20:45 Observed by Robinson (Teignmouth, UK, 26cm reflector) "Fracastorius had a blink - it was bright in red and darker in blue at these three times, and probably in between. This was possibly natural surface colour being detected?". ALPO/BAA weight=1.
Mare Crisium 1975 Apr 19 UT 19:47-20:37 Observed by Robinson (Teignmouth, UK, 26cm reflector) "Mare Crisium N. end of floor - blink (red and blue filters) in patches, bright in red. Blink stops at 20:37". ALPO/BAA weight=1.
On 1980 Jan 26 at UT21:35-22:25 Blair (Refrewshire, Scotland, 10" reflector, 83-276x, seeing=III-IV and transparency poor) discovered a bright spot on the north rim and through filters it "flashed" green, red and blue. Clouds interupted observing, but when they cleared the effect was still present. Other craters did not show this effect. Cameron catalog ID=83 and weight=4.
On 1993 Jan 02 at UT 17:42 A. Dollfus (Meudon, France, 1m aperture telescope used) detected evidence for a dust cloud in Langrenous crater using CCD polarimetry. The ALPO/BAA weight=5.
On 1990 Apr 04 at UT 21:30-21:50 B. LeFranc (France?) reported observing a white flame effect in Copernicus crater (sketch made) - though Foley comments that the actual location was east of the crater. The Cameron 2006 catalog ID=398 and the weight=2. The ALPO/BAA weight=2.
Plato 1964 Nov 14 UT 01:00? Observed by Bartlett (Baltimore, MD, USA, 4" refractor?) "Peak on E. wall brilliant white, strong blue band at inner base; on S. wall was a small, bright red spot." NASA catalog weight=4. NASA catalog ID #864. ALPO/BAA weight=3.
Posidonius 1970 Apr 15 UT 21:05-22:10 Observed by Wanderley Nazareth (Sao Paulo, Brazil, reflector) "Intermittant pulsation. Drawing 20S interval for pulsations. (too long for atmospheric aberration? Apollo 13 watch)." NASA catalog weight=3. NASA catalog ID #1254. ALPO/BAA weight=3.
On 1968 May 07 at UT 03:00-03:40 Kelsey (Riverside, CA, USA, 8" reflector) observed Messier and Messier A and noted the following: "The ray-tail halo (in N. ray) showed a possible enhancement in blue filter at 1st obs. per. but not seen at 0330. Later enhancement was indicated in red filter but not apparent at 0600h. The red enhancement is very unsual; but has been suspected on a few previous occasions. Not seen vis. (confirm. of Jean?)" The Cameron 1978 catalog ID= and weight=5. The ALPO/BAA weight=3.
Near and on Plato 1970 Apr 15 UT 21:45-22:04 Observed by da Silva (Sao Paulo, Brazil, 10" & 20" refractors) "Crater chain W. of Plato -- 3rd crater W. (Plato Y) was brighter than surroundings. Lozenge on W. wall (landslip?) was darker than inner wall. Bright part of wall was yellowish-white. da Silva reports this as neg. (normal aspects) obs (Apollo 13 watch probably normal as Y is a bright halo crater)." NASA catalog weight=0. NASA catalog ID #1255. ALPO/BAA weight=1.
Tycho 1970- Apr 15 UTC 22:00-23:00 Observer: Nelson Travnik (Matias Barbosa, Minas Gerais, Brazil, 4" refractor, x250 & x400, seeing excellent, Wratten 15 and 23 filters used) "Slightly pulsating white glow on W. (IAU?) wall's external slope (Apollo 13 watch). NASA catalog ID #1256, NASA weight=2. ALPO/BAA weight=2.
On 1982 Oct 26 at UT 20:41-22:22 P. Madej (Huddersfield, UK, seeing=II and transparency=good) found that a blurring effect on the crater Yerkes had spread to Picard (~3.5 deg brightness). The effect was not detected in yellow light from the Wratten 15 filter, but a brightness change was picked up in red Wratten 25 light. J.D. Cook found dark surrounding Picard bright illumination. The Cameron 2006 catalog ID=188 and weight=5. The ALPO/BAA weight=3.
Yerkes-Picard 1982 Oct 26 UT 20:41-22:22 and 21:31 Observed by Madej (Yorkshire, England, Seeing II, Transparency Good) and Cook (Frimley, England, Seeing=II, Transparency Good) "(Madej) could not focus Yerkes as well as could Peirce. By 2041 effect extended to Picard (~3.5 deg). In W15 filter not apparent, but albedo change was very marked in W25 red filter. (M. Cook) at 2222 noted faint orange around Yerkes E. Spurious color seen in other areas. Color around Yerkes intermittent. In blue filter it was still orange. (J. Cook) at 2131 noted S rim of moon was orange & seeing was such that it was fizzing. Around Yerkes only orange tint - tending intermittent" Cameron (2006) catalog ID #188 & weight=5 (very good). ALPO/BAA weight=1.
Plato 1969 May 26 UT 20:30-21:05 Observed by Farrant (Cambridge, England, 8" reflector, x160, S=G) "Had misty portion of SW(ast. ?) floor from 2030-2105h at which time it was gone. Clearly seen, had ill-defined boundaries & was an easy obj. to see. Alt.=33 deg. (Apollo 10 watch)." NASA catalog weight=3. NASA catalog ID No. 1148. ALPO/BAA weight=1.
Proclus 1989 Jul 13 UT 21:04-21:13 Observed by M.Cook (Frimley, UK, 90mm Quastar Cat., Seeing III, transoparency hazy) and by Moore (Selsey, England) "Following an alert call by Miles concerning the crater Proclus looking different, Cook observed a circular dark patch that filled about half of the eastern half of the crater floor. To cut down the glare a blue filter was then used and a slightly less dark area was seen extending from this in a southerly direction. 8 rays were seen. The dark patch was confirmed by Patrick Moore. However David Darling (USA) who observed a few hours later on 1989 Jul 14 at 03:28 UT could not see this dark patch." BAA Lunar Section observation. The Cameron 2006 catalog ID=370 and weight=?. The ALPO/BAA weight=2
Scarcely a trace of nebulae tonight. As long as to June 10 at 2000UT? A little blackness remained. (P. Moore thinks it was a LTP, WSC it was a permanent feature?) Drawing. Seen by Nevelius Emmett, J. Boroughbridge, England. The 2006 Extension catalog by Cameron assigns an ID No. of 4 and a weight of 1. The ALPO/BAA weight=1.
On 1983 Jul 20 at UT 18:50-22:40 P.W. Foley (Kent, UK, 12"reflector, seeing II-III) noted that the south wall of Plato at the 11 o'clock position, at the location of a cleft, was fuzzy on either side of the cleft. There was also a deep red colour along the cleft and the outside wall. The colour had gone by 22:40 though. All other parts of the rim of Plato were clear and distinct. M. Cook (Frimley, UK, seeing III) sketched some obscurations at 22:03UT. At 22:08UT the red colour reduced to a red line and vanished by 22:37. The south wall obscuration varied in size and there was a possible obscuration at the 7 o'clock position. J. Cook (Frimley, UK, seeing II-III) confirmed Foley's and M.Cook's observations. Detail inside the crater was sharp, but colour oppoiste to what is usual. Price (Camberley, UK, seeing IV-V) a few km away had atmospheric ripples affecting his observations. At 21:36UT G. North described the south wall as odd in appearance and the terrain south of this was lacking in detail - this was odd because elsewhere Plato was nice and sharp. At 21:45UT though the north section of the crater was a hazy red. The cameron 206 catalog ID=224 and the weight=5. The ALPO/BAA weight=3.
Aristarchus 1975 Dec 14/15 UT 17:05-00:30 Observed by Foley (Dartford, England, 12" reflector, S=II) and Moore (Sussex, UK, 15" reflector x250 S=IV) and Argent and Brumder (Sussex, UK). In early sunrise conditions, W. wall was less brilliant than usual -- matched only by Sharp, Bianchini, & Marian. Extraordinary detail could be seen on this wall. Also noted intense & distinctly blue color entire length of W. wall. 3 others corroborated detail, but not color. Moore found things normal & saw Aris. brightest at 2030-2125h tho Argent & Brumder made it < Proclus" NASA catalog weight=4. NASA catlog ID #1422. ALPO/BAA weight=1.
Aristrachus 1966 Jul 29 UT 03:40 Observed by Simmons (Jacksonville, FL, USA, 6" reflector x192, S=7, T=4-5) and Corralitos Observatory (Organ Pass, NM, USA, 24" reflector + Moonblink) "Spot on S.wall vis. only in red filter, brightness 8deg. Slightly brighter than surrounding wall. No confirm. Says it might be part that reflected better. Not confirmed by Corralitos Obs. MB." NASA catalog ID #968. NASA catalog weight=1 (very low).
On 1938 Mar 13 at UT 04:00-06:00 Barker (Chestnut, England, UK) noted a slight reddish colour in Plato. However Fox (Newark, UK, 6.5" reflector, x240) saw none on the south east wall, but instead saw a yellowish glow on the southern floor at the same time (confirmation?). Appearently Fox saw the same effect on Apr 10, 11, and May 8-11, then on June 8-10. The Cameron 2006 catalog ID=432 and the weight=5. The ALPO/BAA weight=3.
Aristarchus 1989 Jul 15 UT 02:00-04:20 Observed by Manske, Weier, Curtis, Keyes, Yanna, Norman, Knutson, Sullivan, Eichman and Radi (Carl Fosmark Jr. Memorial Observatory, Madison, WI, USA, SCT C11) "Manske initially observed a reddish tinge on the SE rim of Aristarchus. The colour was present in different eyepieces. Two other pinkish tinge areas were seen on the SE and NE rims. 4 of the observers did not see colour. Independent confirmation was made by Don Spain (KY) and Smith in LA. Full details can be found on the following web site: http://www.ltpresearch.org/ltpreports/LTP19890715.htm " An ALPO report.
On 1978 Jan 20 at UT19:10 P.W. Foley (Kent, UK, 12" reflector) observed a red spot at the southern edge of Gassendi C. P. Moore (Slesey, UK, 15" reflector, S=II-III) reported nothing unusual 17:00-17:50. Turner and others reported negative at 22:01. Pedler (UK, 12.5" reflector, S=III-IV) though detected a yellow-orange tint on the east floor of Gassendi A but the effect faded during poor seeing moments. Cameron 2005 catalog ID=24 and weight=5. ALPO/BAA weight=3.
Aristarchus 1967 May 20 UTC 20:15 Observed by Darnella (Copenhagen, Denmark, 3.5?" refractor) "Red spots on S.rim. Moon was low." NASA catalog weight=1 (very low). NASA catalog ID #1036.
On 1969 May 28 at UT 02:18 Delano (Taunton? MA, USA, 12.5" reflector, x300, seeing=fair and transparency=good) through the red filter at 02:18UT saw a bright area on the west wall of Aristarchus crater become 2x brighter than normal then faded back to normal in < 1 min duration. The spot was 8km centred on sigma=0.682 and eta=0.397. No events seen at Kepler (Apollo 10 watch). The Cameron 1978 catalog ID=1149 and weight=4. ALPO/BAA weight=3.
On 1983 Jul 21 at UT 21:02-23:18 P.W. Foley (Kent, UK, 12" reflector, seeing=III) found the region around the cleft on the souther rim to be out of focus - however atmospheric conditions were turbulent until 23:18UT. An unsual dark triangular region (long base against rim) was seen to extend from the inner rim at 12 o'clock onto the floor for 13- 16km. The crater had lots of detail elsewhere. M. Cook (Frimley, UK) found the south east to soth west to be obscured again, but not as badly as she had seen on the 20th July. J. Cook (Frimley, UK) found the dark region had 2 white bands on the side and the south west wall was blurred like it was on the 20th July - this time tough colour was not present. There were also two light patches on the floor. Mosely (Coventry, UK) observed the south wall at x120 and found the wall out of focus at the 11 o'clock location. Through a yellow filter he saw a "white mistiness: on the top of the southern rim and only the south east cleft could be seen (no colour). By 22:40-23:00 the effect had cleared up. No dark triangular patch was seen. When Marshall (Surrey, UK) observed (22:30-03:00) nothing unsual was seen, though a sketch provided shows a light patch on the floor located at 11 o'clock. All observations, made by all observers had some atmospheric turbulence, however trsnparency was good. The Cameron 2006 catalog ID=225 and the weight=5. The ALPO/BAA weight=3.
On 1980 Dec 18 at UT20:46-23:58 A.C. Cook (Frimley, UK, 12" reflector, 40-250x, S=IV and transparency good) found the north west wall to be brighter in red than in blue light, however the effect faded during 21:29-21:41UT and was gone by 22:40UT. There was however spurious colour on the north west wall. M. Cook (Frimley, UK) found the central peak to be both bright and diffuse, and brighter in red than in blue light during 20:52-20:57UT, however at "22:53-23:58 c.p. very bright & previous area decreased in size. No detail in white or red, just visible in blue. Sketch (J. Cook) Orange out on NW rim & on NW side of c.p. Similar effects seen on other craters. (madej) c.p. & W. rim wall very sharp. c.p. disappears in yellow but still seen in purple. (pedler) c.p. > red than blue but no obstruction. W wall interior dusky, darker in blue." A.C. Cook's photo depicts the central peak as very bright. Cameron 2006 catalog TLP ID=120 and weight=5. ALPO/BAA weight=2.
On 1969 May 28 at UT 02:18 Delano (Taunton? MA, USA, 12.5" reflector, x300) suspected a short duration flare up on the W wall of Aristarchus at 0.682 and 0.397, but it may have been due to poor seeing. No events seen at Kepler (Apollo 10 watch). The Cameron 1978 catalog ID=1149 and weight=4. ALPO/BAA weight=1.
On 1992 May 13 at UT 20:16-21:29 several observers reported a TLP in Plato mostly concerning the visibility of floor craterlets, however observer seeing varied from III-V. North (UK, 18.25" reflector) reported "Colouration and floor craterlets very prominent. Seeing Antoniadi V, Transparancy Poor.". Foley (Kent, UK, 12" reflector seeing=III-IV) found the floor to be bright and in the better moment of seeing detected floor craterlets. The WNW spot was misty some of the time. Moore (Selsey, UK, 15" reflector, seeing V) had very poor seing conditions. J.D. Cook and M.C. Cook (Frimley, UK, 3.6" reflector, seeing II-III) used a CCD camera at 22:11 UT. The Cameron 2006 catalog ID=445 and the weight=5. The ALPO/BAA weight=2.