Herodotus 1971 Dec 02 UT 20:40 Observed by Kilburn (Manchester, UK, 8" refractor, x130, Transparency very good with a thin mist, seeing excellent, x130). Bright point (considerably brighter than its surroundings) was seen on the SE of the illuminated floor of Herodotus in white light. It was quite close to the crater rim. The spot had no colour. ALPO/BAA weight=2.
Aristarchus 1967 Dec 16 UTC 22:00? Observed by Farrant (Cambridge, England, 8" reflector) "Crater took on an unusual appearance on inner NE (ast. ?) wall. Showed a very pale blue & the opposite wall a pale red color seen in no other features. Lasted only 10m & survived a change of eyepieces." Seeing=I (Antoniadi). NASA catalof weight=3 (average). NASA catalog ID #1056.
David Darling observed bright glittering on Aristarchus. This was followed by a flare up in brightness at 00:38:05 UT in the comet-like ray area of the crater equivalent in intensity to the central peak. Then he saw another one on the north east rim of Aristarchus of the same brightness. A third flare was seen at 00:49UT in south of Herodotus, on the comet-like ray. Another two flares were observed at 00:56UT on the north west rim of Aristarchus. Darling suspects that these effects were due to seeing effects and Cameron agrees. However Weier suspects that they were TLP? Brightness measurements by Weier were for the south west rim of Herodotus 8.0, for a spot at the Cobra's Head 9.0 and 7.5 for C.H. Cameron apparently did not see the flashes but did suspect that the interior of Aristarchus was a bit unusual. Don Spain did not see anything unsual at all. Cameron 2006 extended catalog ID=380 and the observation weight=3. The ALPO/BAA weight=2.
On 2002 mar 29 at 02:20-02:38UT C. Brook (Plymouth, UK, 60mm refractor, x120 - no cloud, slight haze, no wind, seeing good) noticed during first part of observing period that Aristarchus was getting steadily brighter, very much brighter than Proclus. This continued until 02:36UT when it dimmed suddenly over a period of about a minute or so. No colour effects seen. ALPO/BAA weight=2.
On 2002 mar 29 at 02:20-02:38UT C. Brook (Plymouth, UK, 60mm refractor, x120 - no cloud, slight haze, no wind, seeing good) noticed during first part of observing period that Aristarchus was getting steadily brighter, very much brighter than Proclus. This continued until 02:36UT when it dimmed suddenly over a period of about a minute or so. No colour effects seen. ALPO/BAA weight=2. Just as an after thought - was it Aristarchus that was varying, or Proclus?
Louderback, of South Bend, WA, USA observed a bright area over Mons Anguis and Eimmart - it resembled a comet and had a bluish colour and varied in brightness. The colour was confirmed as it was not seen in a red filter but could be seen in blue and white light. Other features were checked but did not show anything similar although a violet glare was suspected in the blue filter. A sketch was made. Observer made Eimmart 8 in brightness at 07:30UT. Noted that the area around Eimmart appeared opaque at times and less so at other times. At 08:52UT the phenomenon was seen again. On May 2nd a bright spot was still seen in the region but it was not changing dimensions. During the observation on Apr 30th the atmospheric transparency was excellent. A 2.5" refractor was used. Reference: Personal communication from Louderback to Cameron on 1980 Jul 16th. The Cameron 2006 catalog extension ID of this TLP was 93 and the weight was 4. ALPO/BAA weight=3.
On 1978 Aug 18 at UT 22:00 Coates (England?, UK, 3" refractor, seeing=II) found that the inner bands of Aristarchus were hard to see, this was odd because the seeing conditions were good and he usually sees them? However he did not believe that there was any obscuration going on. The Cameron 2006 catalog ID=37 and weight=0. The ALPO/BAA weight=1.
On 1970 Nov 14 UT20:10 J.Coates (Burnley Astromical Society, 8.5" reflector, x102 and x204) saw a dirty green colour on the NW region of the crater, in patches, with a green area nearby. ALPO/BAA weight=1.
On 2006 Dec 08 at UT 17:32 (+/- 2 min) M. Collins (Palmerston North, New Zealand, 3.5" Maksutov, 40mm eyepiece, seeing III-IV) observed during daylight hours an extremely bright flash south of Godin. It flared up and down over a fraction of a second an appeared three times brighter than the Moon background itself. The ALPO/BAA weight=1.
On 1964 Mar 26 at UT 23:58 Lecuona (Madison, New Jersey, USA, x225, seeing = good) observed a sudden red low on the south west rim of Aristarchus in the dark part of the Moon. The Cameron 1978 catalog ID= 803 and weight=3. The ALPO/BAA weight=3.
On 1968 Dec 23 at UT 02:00-02:30 C. Harris (CA, USA) saw the south east quadrant of Grimaldi brighten up 3-4 times on "rim & area elliptical out SE". This was confirmed by Wilmington. No changes seen in India at UT 14:00-16:00 by Sinvhal (Kodai Kanal, India) - though cameron does not state excatly whether they were looking at Grimaldi, Aristarchus or elsewhere on the Moon. The cameron 1978 catalog ID=1108 and weight=5. The ALPO/BAA weight=3.
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.
Observer: Fallows Observing site: Cape Town, South Africa. Cameron 1978 catalog describes the event as: Bright 8th magnitude 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=91 and weight=3. ALPO/BAA weight=2.
On 1968 Dec 24 at UT 03:00-06:00 Kohlenberger (Fullerton, CA, USA), C. Harris (CA?, USA), and Bunton (Hawaii) observed in Aristarchus: "Brightening at times, very active. Arist. a star-like; both brightening simultaneously, pulsing from 0300-0306 & starlike at N. side at 0323 (Kohlenberger). Harris saw Aris. brightening at times. (Confirm. ?), Bunton saw nothing unusual (0300-0600) (alerted for tidal predict. by Middlehurst? apollo 8 watches)". The Cameron 1978 catalog ID=1109 and weight=4. The ALPO/BAA weight=3.
On 2002 Feb 26th at 18:41:25 UT Michael Hather saw, on the limits of vision, a brief magnitude 7 white flash about 300 km north west of Aristarchus, in Earthshine. He was using a 120 mm refractor. No other observers were observing at this time.
On 1964 Mar 18 at UT00:59 Earl and his brother (St Petersburg, FL, USA, 2.4" refractor, x35. seeing = very good) observed flashes in Aristarchus crater. The Cameron 1978 catalog ID= and weight=2. The ALPO/BAA weight=2.
Kepler In 1949 Feb 02 at UT 18:20-19:15 Y.W.I. Fisher (Brussels, Belgium, 4" refractor) observed in Earthshine a white between Kepler and Encke, in Earthshine. The glow began to fade at 18:50 and was gone by 19:15. The Cameron 1978 catalog ID=513 and the weight=2. The 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 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.
On 1969 Nov 11/12 at UT23:30-01:00 Mitchell, Celis and Marti (Paso Hondo, Chile, 10" refractor, x96, 4" refractor, x80, 3" refractor, x60, seeing = excellent) observed Aristarchus with a blue centre and irregular form, alternating with normal aspects. Some opacity (independent confirmation?) - Apollo 12 watch. The Cameron 1978 catalog ID=1208 and weight=3. The 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.
White spot near Censorinus 1966 Dec 18 UT 23:40-23:46 Observed by Enie (Pittsburgh, Pennsylvania, USA, 8" reflector x100, S=G) "Attention drawn to pink color in this usually white patch. Brightened to a light reddish tinge for 2 mins, then faded back to pink, then to white, Sketch." NASA catalog weight=4 (high). NASA catalog ID #1002.
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.
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.
On 1989 Jan 14 at UT 19:15-19:30 M. Holmes (Rochdale, England, UK) reported that Torricelli B was "dull & inconspicuous". The Cameron 2006 catalog ID=344 and the weight=5. The ALPO/BAA weight=1.
1987 Feb 06 UTC 02:35 Observed by Darling (Sun Praire, Wisconsin, USA, 12.5" Newtonian x342) "I was using a 12.5 f5 Newtonian reflector with a 9mm eyepiece and 2x Barlow with no filters. I had been observing other features on the Moon when I had panned to the area where the sunrise was taking place on Mount Piton. The mountain peak looked like a shimmering block of ice with a phosphorescence luminescence cloud around the peak. What was really interesting was the shaft of light streaming across the Lunar Maria that appeared like a cone and it came to a point near Mount Piton. The Mountain had the appearance of mother of pearl and the luster or glow that surround the peak only lasted about 20 minutes." The Cameron 2006 catalog ID=296 and gthe weight=4. the ALPO/BAA weight=3.
Lubbock 1973 Nov 02 UT 22:10-23:59 Observed by R.Hill (Greensboro, N. Carolina, USA) "Color in crater changed fro. gray to brownish -- strong enough change to be noted. Never saw anything like this 7 yrs. of observing". NASA catalog weight=3. NASA catalog ID #1379. ALPO/BAA weight=3.
On 1978 May 14 at UT21:30-22:52 P.W. Foley (Kent, UK, 12" reflector, seeing II and transparency excellent, no spurious colour) observed Aristarchus to be very bright in Earthshine and bluish. The CED brightness measuring device gave a very bright reading of 0.9, the brightest he had ever seen ir before was 0.3. Cameron 2006 catalog ID= 29 and weight=3. ALPO/BAA weight=2.
On 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). Īn 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.
Near Ross D (24E, 11N) 1964 Mar 21 UT 05:00-06:20 Observed by Harris, Crow, Cross (Whittier, CA, USA) - negative confirmation from Las Cruces. NASA catalog weight=0 (unreliable). NASA catalog ID #805. 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.
On 1988 Nov 16 at UT 18:20 M.C. Cook (Frimley, UK) observed that a ray north east of censorinus appeared to be very diffuse and this did not change during the observation. This was odd because proclus ray material remained clear. The apron material of Censorinus was diffuse E-W and the northern part was dull, but not fuzzy. The Cameron 2006 catalog ID=340 and the weight=3. The ALPO/BAA weight=2.
On 1988 Nov 16 at UT 18:20 M.C. Cook (Frimley, UK) observed that Torricelli B changed in brightness (at times), but thinks that this was due to atmospheric transparency. The Cameron 2006 catalog ID=340 and the weight=3. The ALPO/BAA weight=1.
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.
Piton 2004 Jan 30 UT 15:52 Observed by a GLR observer (Italy) "CCD image shows a point of light in the NW shadow - possibly highland starting to emerge from the shadow?" A GLR report.
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.
On 1969 Nov 18 at UT 00:30-02:30 W. Cameron (Greenbelt, MD, USA, 12" reflector, x80 and x320) using a low power eyepiece, observed that bright craters (but not all of them) "glittered like diamonds". These craters were several on the terminator, Proclus, Censorinus, Manillius, Menelaus and Dionysius. The glitter effect was on the west wall crest -- like stars. Higher power revealed these areas to be bright but not star-like (nor glittering). The Cameron 1978 catalog ID=1212 and the weight=1. The ALPO/BAA weight=1.
Plato 1789 Jul 30 UTC 21:00? Observed by Schroter (Lilienthal, Germany) NASA Catalog Event #61, NASA Weight=2 (slightly low) Event described as: "Soon after sunrise saw a kind of fermentation on the floor which clearly resembled a kind of twilight, (due to some kind of aberration unknown to the observer?)" For further details see reference: Middlehurst, B.M., Burley, J.M., Moore, P.A. and Welther, B.L., 1968, NASA TR R-277.
Eratosthenes 1952 Nov 25 UT 16:30 A.P. Lenham (Swindon, UK, 3- inch refractor x150, Definition Good) noted that there was faint/slightly bright detail inside the interior shadow - observer comments "presumably peaks of central mountains & W. Wall ridge, but very faint" - however this is worth checking out. ALPO/BAA weight=1.
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.
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.
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.
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.
Aristillus 1939 Jul 26 UT 02:30 Observed by Haas? (NM?, USA, 12?" reflector) "Dark area to W. part of floor was I=3.7. (see #450, 459 & 461). Used diff. telescopes but can not explain difference)" NASA catalog weight=4 (good). NASA catalog ID #454.
On 1936 Oct 25 at 01:35 UT W. Haas (Alliance, OH, USA, 12" reflector) saw small bright spots on the floor of Eratosthenes, (Pickering's atlas 9A, col. 30deg, shows no spots - according to Cameron). Cameron 1978 catalog TLP=417 and weight=4. ALPO/BAA weight=1.
Copernicus 1966 Mar 01-02 UT 22:06-09:45 Observed by Lovell (Auburn, OH, 4" refractor, x120m S=E, T=3.5) "As sun rose higher, west (ast.?) outer wall was bathed in a soft viol. color -- not in evidence on flat ground below the wall" NASA catalog weight=3, NASA catalog ID #922.
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.
On 2011 Oct 07 UT 21:45 Gassendi observed by P. Grego (St Dennis, UK,300m Newtonian, x150, seeing III, intermittent cloud) - whilst producing some sketches of the crater - observer noticed a faint point of light inside the shadow filled interior, two thirds of the way out from where the central peaks should have been, towards the SE rim. Some uncertainty in being sure about this spot and after interuption by cloud it was not seen later that evening. ALPO/BAA weight=1 to refelct uncertainty of observer.
Bullialdus 1979 Jun 05 UT 22:00-23:00 Observed by Cook M.C. and J.D. (Frimley, UK, 12-inch reflector, Seeing III-IV, good transparency). MC Cook observed internittently over this time period (due to cloud) and found the crater sharper in a blue filter than in a red filter. No obscuration seen apart from a darkish patch on the SW rim and spreading over onto an area surrounding the rim, which she took to be shadow, though the main shadow was along the east rim of the crater. JD. Cook observed an orange colouration seen on eastern and the cleft on the SW rim. Dark area seen on southern floor of crater, south of central peak. 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.
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.
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.
At 03:30UT observer noticed a hint of yellow colour on the floor of the crater and by 03:57UT the south east and central parts of the floor and the circular feature on the south west floor had turned a deep yellow colour. The rest of the crater remained colourless. Other craters also remained colourless. By 04:05UT the colour was fading and by 04:15UT it was gone. Maurice Collins in New Zealand took some low resolution colour images about 4 hours later but these failed to show any yellow colour. Zac Pujic obtained colour images at a different time of natural surface colour on the Moon and finds that Bullialdus does actually have a natural yellow cast to most of the floor. However this does not explain the variability in colour strength seen by Robin Gray. ALPO/BAA weight=3.
Hobdell, of St Petersburg, FL, USA, using a 2"? refractor? and Seeing=I-II, saw a bright region on the north west wall that seemed to change in brightness. In truth, there were other features elsewhere on the Moon that also fluctuated, but not as much as Aristarchus was. No colour was noticed. Cameron suspects fluctuations in our own atmosphere. Cameron 2006 extension catalog ID 131 and weight=1. ALPO/BAA weight=1.
On 2016 Jul 17 UT 03:49 P.Zeller (ALPO, Indianapolis, IN, USA) imaged a pseudo-peak with shadow on the floor of Herodotus, however the image scale and quality of this colour image were not great and the observer suspects that it might be an imaging artefact. ALPO/BAA weight=1.
P. Foley of Kent, UK, using a 12" reflector, seeing=III-II, noticed that initially that the crater was pretty dull and that the floor was a slate blue-gray in colour at 22:45UT. A noticeable green spot inside the crater on the south east appeared at 22:25UT and vanished at 00:50UT. Cameron notes that one doesn't get green with spurious colour. Crater Extinction brightness measurements were made at 22:00 UT (reading=2.8) and at 23:45UT (reading=3.7). The crater dropped in brightness from 3.7 to 2.8 at 23:50UT and remained lower until 3.0 at 23:50-03:15 UT. A graph was produced and showed Proclus and Censorinus at similar brightnesses, but Aristarchus variable. The Earthshine was 0.3. Cameron 2006 Extension catalog ID=31 and weight=5. ALPO/BAA weight=3.
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.
A fleeting faint reddish patch was seen in Gassendi at 21:15UT. This observation has an ALPO/BAA weight of 2.
Ross D 1965 Apr 14 UT 06:03-06:22 Observed by Harris (Whittier?, CA?, USA, 19"? reflector) "Phenomenon description unavailable. Given at an ALPO meeting" NASA catalog weight=0 (very unreliable). NASA catalog ID #874.
Schroter's Valley 1897 Oct 08 UT 22:00 Observed by Pickering (Cambridge, Maas., USA, 15"? refractor) "Variations in vapor col. Tillsow, C was largest compared with D&E& most conspicuous 1.3 d after sunrise. Drawing. (time est. fr. given colon.)" NASA catalog weight=3 (average). NASA catalog ID #291.
On 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.
Archimedes 1940 Jun 20 UT 07:30 Observed by Haas (NM, USA, 12?" reflector) "NE wall (outer) had I=2.5 on this nite but 5.0 on Aug. 18 (see #471 -- both same phase so real diff. 2.5 normal?)" NASA weight=4. NASA ID No. #467. ALPO/BAA weight=2.