On 2013 Apr 22 UT 01:39-02:37 P. Zeller (Indianapollis, USA, 10" f/4 reflector, x200, seeing 6, Transparency 3 - scattered cirrus) observed visually (depicted in sketch) the two closely spaced NW wall dark bands) to have a rusty-red hue. The colour of these bands did not change over the period of the observing session. Images were taken, but resolution and image S/N is not sufficient to resolve separate bands here, or to detect colour. The ALPO/BAA weight=2.
On 1981 Aug 11 at UT21:05-21:36 G. North (England, seeing=poor) detected, in green light, a darkening on the floor of Plato. This effect was not seen elsewhere. J-H Robinson (Teighmouth, Devon, UK) detected on the SSE rim (inner and beyond) a triangle that appeared hazy in a wide range of filters at 21:05UT. However at 21:36UT it was only hazy in green and blue light. No similar effect was seen elsewhere. The Cameron 2006 catalog ID=150 and weight=5. The ALPO/BAA weight=3.
On 1978 Oct 23 observing period: UT22:00-22:40 A.C. Cook (Frimley, Surrey, UK, 6" reflector, x144, 6mm Ortho eyepiece, seeing IV, red and blue filters used) saw at 22:10 a secctor on thwe western floor to be mainly bright in the red. The surface was bumpy here. The observer at the time commented that this was probably not a TLP, but no precise explanation given. ALPO/BAA weight=1.
Torricelli B 1995 Apr 11 UTC 20:15 Observed by North (UK). "Colour moonblink reaction, and crater dull". BAA Lunar Section report. ALP\BAA weight=3.
On 2017 Feb 08 UT 01:45 A.Martini Jr (10" Schmidt-Cassegrain with ASI 120 MC camera +IR filter, Gain 40, Gamma 36, exposure 0.003 sec) saw on a computer monitor screen a flash to far to the west of Herodotus and Aristarchus at the location 54.53W, 23.5N. It had a duration of 0.5 sec and on a brightness scale of 0 = night side of the Moon to 10 = Aristarchus, ranked 7. Unfortunately they were not recording at the time. As there was no confirmation observation and it could be a cosmic ray air shower detection, the ALPO/BAA weight=1
NE of Philolaus 1948 May 20 UT 22:00-22:15 Observed by Baum (Chester, UK, 4.5" refractor) A distinct reddish tint suddenly appeared to the NE of the crater, and persisted for 15 min, before rapidly fading away. NASA catalog weight=3. NASA catalog ID #505. ALPO/BAA weight=3.
On 1965 Jun 12 at UT > 00:00 an unknown observer (Porta?) reported that the area of Herodotus and the Cobra Head expanded and the colour went to rose. The next night the floor was normal. In filters, phenomenon accentuated in orange. The cameron 1978 catalog ID=880 and weight=3. The ALPO/BAA weight=2.
Herodotus 1965 Jun 11 UTC 21:35-21:40 Observed by Porta, Garau (Mallorca, Baleares, 4" refractor x250) "Red glow in crater at 2140, then clouds stopped obs. After clouds, floor was abnormal rose color" NASA catalog weight=5. NASA catalog ID #879. ALPO/BAA weight=4.
On 1978 Mar 21 at UT 20:57 an Unknown observer observed a TLP in Aristarchus crater. The details for this report are still being looked up in the archives. In view of the uncertain details this TLP has been given an ALPO/BAA weight of 1.
Aristarchus 1982 Jul 03/04 UTC 20:55-01:08 Observed by Foley (Kent, UK, Seeing Antoniadi III) "Brightness variance" - CED 3.6-4.1-4.9. When the crater was dark it had a slate-blue-grey interior. Moore found the crater to be exceptionally bright and this was confirmed by J.D. Cook (CED 3.8-4.1). The Cameron 2006 catalog ID=174 and weight=5. The ALPO/BAA weight=3.
On 1982 Jul 03/04 at UT 20:45-01:08 J.D. Cook (Frimley, Surrey, UK) found the Mare Frogoris area, north of Plato was pink at 20:45UT. Saxton found flashes in Mare Frigoris and near thye Alps. The Cameron 2006 catalog ID=174 and the weight=5. The ALPO/BAA weight=2.
Interior craterlets could not be seen and some of the walls and exterior features were fuzzy. ALPO/BAA weight=1.
Vieta 1923 Sep 23 UTC 19:00? Observed by Cernov (Russia, 2 refractors? x94?) "Both dark spots merged together even with 94x magnification. (due to libration &/or seeing?)" NASA catalog weight=1 (low). NASA catalog ID #389.
In 1942 Feb 02 at UT 18:20-19:15 Y.W.I. Fisher (Brussels, Belgium) a whitish glow near the Earthlit limb, near to Kepler (37W, 7N). The duration of the event was 55 min. The Cameron 1978 catalog ID=488 and weight=2. The ALPO/BAA weight=1. Ref. p220-221 IAU Symposium No. 14 - The Moon.
On 1975 Dec 19 at UT22:45 P.W. Foley (Kent, UK) suspected an anomaly in Aristarchus. Cameron 1978 catalog weight=1424 and weight=1. ALPO/BAA weight=1.
Proclus 1973 Jan 21/22 UTC 23:57-00:25 Observed by Muller (located at 51.42N 8.75E) "Proclus much brighter than Cenorinus" 50mm refractor used. Ref Hilbrecht & Kuveler (1984) Moon and Planets Vol 30 p53-61.
On 1979 Sep 09 at UT08:00-08:15 D. Darling (Sun Praire, WI, USA, 12.5" reflector, x75 and photography used, seeing 4/10 and the Moon's altitude was 45deg) photographed Romer crater and recorded two adjacent bright cigar shaped objects - these were the same size as an observation made in 1987. Darling believes that these are ridges. Cameron comments that in LO-IV 192-3,2 a ridge is revealed on the inside wall that matches the description. Cameron 2006 catalog ID=66 and weight=2. ALPO/BAA weight=1.
On 1982 Jul 09 at UT 01:05-01:25 P. Moore (Selsey, UK, 12.5"? reflector, seeing III) found that Aristarchus was very bright and slightly blue. Cameron comments that Moore's eyesight is not very blue sensitive. The Cameron 2006 catalog ID=175 and weight= 4. The ALPO/BAA weight=2.
On 1982 Jul 09 at UT01:05-01:25 P. Moore (Selsey, UK, 12.5" reflector, seeing=III) found that Grimaldi A was the 2nd brightest feature on the Moon, and that there was colour detected with a Moon blink device on the floor of Grimaldi. The Cameron 2006 catalog ID=175 and the weight= 4. The ALPO/BAA weight=3.
1964 Jul 29 UT 05:40-06:06 Observed by Bartlett (Baltimore, MD, USA) "Nimbus only -- dark viol. hue. S.floor granulated, dull -- 6 bright. Faint yellow-brown tinge. Rest of crater 8." S=6, T=3- 2. NASA catalog weight=4. NASA catalog ID #838. ALPO/BAA weight=2.
On 1995 Apr 03 at UT 03:30 Unknown Observer (Transparency good) saw a darkening in the Cobra Head, Schroter's valley area of Aristarchus - the best example that he had ever seen. The Cameron 2006 catalog ID=474 and the weight=3. The ALPO/BAA weight=. Reference - BAA Lunar Section circular 1995 Oct, p125 and personal communication from David Darling to the BAA on 6/6/1995. Note it is uncertain whether this refers to the Clementine mission or to somebody who observed during the Clementine mission, or somebody with that surname. Anyway if it is the Clementine mission then the date is wrong - possibly the year should have been 1994? The Cameron catalogue does actually mention a TIFF on Clementine mission? The Cameron 2006 catalog ID=474 and the weight=3. I am assuming that the year should be 1994 and not 1995? The ALPO/BAA catalog weight=1 until we can find out what the correct date is?
Aristarchus 1964 Jul 31 UT 02:00-02:23 Observed by Bartlett (Baltimore, MD, USA, 5" reflector x180) "Deep ravine on E.glacis interrupted midway of its length by apparent break just below rim of craterlet assoc. with EWBS. Normally, ravine is seen continuous. Probable obscuration at pt, of break." S=7, T=5. NASA catalog weight=4. NASA catalog ID #834. ALPO/BAA weight=2.
On 1944 Aug 12 at UT 04:00 H.P. Wilkins (Kent, UK, 8.52" reflector) observed that central craterlet in Plato was unusually bright and shows up as a bright white spot on his sketch - though this might have been artistic license in his sketch. His written notes refer to the unusual lack of a rim (especially the northern part) to this craterlet. The ALPO/BAA weight=2.
On 1979 Sep 16 at UT 08:00-09:00 D. Darling (Sun Praire, WI, USA, 12.5" reflector, x62-x97, clear, but Moon at low altitude) detected four new features that he had not seen before in Earthsine in comparison with what he saw on 16 Jul 1979, this time in the southern part of the Moon. pin-point flashes were seen within these bluish areas. Each time a flash occurred the gas clouds brightened (sometimes by 6x) for a few seconds. Cameron thinks that these are related to moving clouds on the Earth's limb e.g. mackeral sky. Cameron 2006 catalog ID=69 and weight=1. ALPO/BAA weight=1.
Briggs A 1980 Feb 11 UT 06:30-07:00 Observed bt Butler_FC (Brixton, UK, 22cm Newtonian reflector, x64, x104, seeing IV). Found Briggs A to be brownish in colour at x64, however the colour vanished at 06:55 when x104 was used. Switching back to x64 the colour was still there but fainter. The colour fade may have been due to day light glare encroaching? Could not see this effect anywhere else on the Moon but did detect what he regarded as a permanent coloured spot (yellow) between Cruger and Grimaldi. ALPO/BAA weight=1.
Herodotus 1969 Aug 09 UTC 03:00-04:03 Observed by Gomez (Sabadell, Spain) desribed in NASA catalog as: "Bright point on SE wall at 0300h, gone at 0322h. Brightened in blink device (Eng.) at 3:30:50, 3:41:36, 04:03:21" 12" reflector x155,x258,x388. Average weight=3 in NASA Catalog. ALPO/BAA weight=2,
James Short, Dr Harris and Mr Stephens saw initially a streak of light on the shadowed floor of Plato. They were not expecting to see any light to reach the floor. Shortly afterwards they saw a second streak of light parallel to the first and this shortly divided into two. Gaps in the mountains were found for both streaks, but they were unable to understand why one of the streaks divided into two. Cameron's 1978 assigns this TLP an ID of 20 and a weight of 5. The ALPO/BAA catalog assigns a weight of 1.
On 1883 Mar 12 at UT 20:00 Hopkins (located somewhere in the eastern USA) saw a line of light-well seen (similar to Cameron's TLP catalog ID 235, except for the apparent phase. The Cameron 1978 catalog ID=235 and the weight=1. The ALPO/BAA weight=1.
Aristarchus 1949 May 01 at UT 20:45 H.P. Wilkins (Kent, UK, 3" refractor x100) observed Earthshine was very detailed and Aristarchus was noticeably a bright patch. Upon concentrating on Aristarchus, he observed that it flared up in brightness considerably more still for about 2 sec. During this flare up time, inner terraces and the central peak became visible. Cameron says that this was confirmed by Barcroft a few hours later???? The Cameron 1978 catalog ID=518 and Weight=5. The ALPO/BAA weight=3.
Mare Crisium 1998 Jan 31 UT 17:15-17:35 R. Braga (Corsica (MI), Italy, 102mm f8.8 refractor, x180, with no diagonal, seeing II, Transparency poor). A very bright point located at 23N 54.5E this was normal! - what was unusual was that it vanished when viewed through a blue Wratten 38A filter (this filter absorbs red, UV, and some green light). The ALPO/BAA weight=2.
In 1937 Feb 15 at UT 16:00? Arkhipov (Russia) observed in Cassini: "Blue-greenish scintillating spots at bottom of crater were vis. on ashen light background. (confirm of Andrenko?)". The Cameron 1978 catalog ID=419 and weight=5. The ALPO/BAA weight=3.
Messier 1981 Sep 03 UT 19:15-19:55 Observed by Evans (England, 254mm Newtonian, seeing II-III, transparency fair). "Messier was under going obscuration" BAA Lunar Section Circular report. ALPO/BAA weight=1.
On 1969 Jul 20 at UT 0845 McIntosh (Auckland, New Zealand, 14" reflector) saw Aristarchus crater to be brighter in red light. This was during the Apollo 11 watch. The Cameron 1978 catalog ID=1173 and weight=3. The ALPO/BAA weight=3.
M. Price of Camberley, UK noticed that an area in relation to the central area of the floor could not be resolved. Averted vision was used, but this did not help to resolve detail. The crater was close to the terminator and was in general sharply in focus apart from the suspect area. No spurious colour seen. Sketch supplied.P. Foley wonders if the effect was due to the resolution limit of Price's scope? Cameron 2006 extension catalog ID=78 and weight=2. ALPO/BAA weight=2. 6" reflector x64 and x120. Seeing=III-IV and Transparency=good.
On 1990 Mar 02 at UT 19:35-19:50 P. Williamson (Shropshire, UK, 14" reflector, x178, seeing=good and steady) noticed a yellow-orange glow in Gassendi (from a small illumnated crater?) in Earthshine at 19:35UT and by 19:40UT it had become very bright white, afterwhich it completely faded within 10 minutes. The Cameron 2006 catalog ID=393 and the weight=1. The ALPO/BAA weight=3.
Sabine 1967 Sep 11 UTC 00:32,00:45 Observers: Jean at al. (27 obs., 21 telescopes, Montreal, Canada, 3-6" refractors, reflectors) "A black, rectangular-shaped cloud vis. in M.Tranquill, moving W-E (IAU ?) & dissipated nr. term., surrounded by viol. colour. Bright yellow flash at 00:45, (obs. in response to request to obs. impact of Surveyor V at 0046) NASA catalog weight=3 (good). NASA catalog ID #1043.
On 1988 Jul 21 at UT 01:00? an Unknown observer (name and geographical position not given in the cameron catalog) detected a darkening on the floor of Proclus crater - this was also seen by other observers - some of whom were making observations independently. The Cameron 2006 catalog ID=330 and the weight=1.
On 1970 Apr 13 at UT09:00-09:03 Whelan (Walters, New Zealand, using a 10" reflector) observed Menelaus to have a deep red cloud that seemed to surge upward from outside the southern edge of the crater wall and disperse around the outside edge, spreading out on reaching Mare Serentiatis. All clear again though by 09:03UT, (Apollo 13 watch). Drawing supplied. Cameron 978 catalog ID=1246 and weight=3. ALPO/BAA weight=3.
On 1969 Jul 20 at UT09:30 Whelan (Wellington, New Zealand, 10" and 6" reflectors. Other observers involved were: Mackrell (New Zealand, 6" reflector) and Spellman (4" reflector) observed Maskelyne crater undergoing a whitish glowing brightening. Shadowy filling of whole crater. Apollo 11 watch. The Cameron 1978 catalog ID=1179 and the weight=3. The ALPO/BAA weight=2.
Posidonius 1969 May 23 UT 11:35-12:45 Observed by Osawa (Hyogo-ken, Japan, 8" reflector x286) "W.(ast. ?) rim of crater was yellow in integ. light, brownish to deep yellow in filter, with no blink. Hue seen thruout obs. (true ground color? or seeing ? or true LTP?) thin clouds. (Apollo 10 watch)". NASA catalog weight=3 average. NASA catalog ID #1141.
Alphonsus 1966 Jun 26 UT 04:30-04:40 Observed visually by D.Harris and E.Arriola (Whittier, CA, USA, 19" reflector x146, and spectrum, S=4, T=1-0) "Absorp. spectrum (visual) of c.p. band at 475+/-5nm (1st est.); 2nd est. at 485+/-5nm. Band degraded towards the viol. Band nr.Hydrogen Beta. as if abnormally broadened. So sign of anything unusual visually in central peak in white light. Absorption appeared only on C.P., not over walls. Calibration corrections put band at 491+/-4nm" NASA catalog weight=5. NASA catalog ID #948. ALPO/BAA weight=5.
On 1988 Jul 22 at UT 02:15-04:00 P.W. Foley (Kent, UK, 11" reflector) made a sketch of a dark area of the (East) floor of Proclus that revealed a large anomalous dark region - there should be no shade here when the sun is at an altitude of above 50 deg!. BAA lunar section archives reveal similar dark shadings - however on this night it was a different shaped dark area. The appearance was confirmed by several observers. Foley reported that the region affected stretched from Proclus to Theophilus. The TLP was seen in the USA too by D, Darling as early as 01:31UT and by others on his TLP network - brightness measurements of the "c.p." were 3.5 and the remainder of the floor was 5.5. However the observers did not all agree on the same position for this dark area. The Cameron 2006 catalog ID= 331 and the weight=2. The ALPO/BAA weight=2.
Herschel 2005 Aug 13 UT 00:07-00:29 Observed by Daniel del Valle Hernandez (Aguadilla, PR, 8"SCT, x225, S=7, T=4) "Interesting configuration of shadows with umbra and penumbra. Effect seemed to reduce over time." An ALPO report. The ALPO/BAA report=2.
Flash seen in Ptolemaeus (A?) - possibly a meteor. Cameron 1978 catalog weight=1. Cameron 1978 catalog ID=863.
Alphonsus 1958 Dec 19 UTC 20:00? Observed by Wilkins (Kent, England) decsribed in the NASA catalog as: "Reddish patch on central peak" 15" reflector used. NASA catalog weight=4 (high). NASA catalof TLP ID No. 711.
On 1994 Apr 19 at UT 22:00 R. Knopp (Berlin, Germany) noticed a darkening of the interior of the crater Atlas. The ALPO/BAA weight=1.
Eratosthenes 1954 May 11 UTC 20:00 Observer: Catermole (UK, 3" refractor) "Central peak invis. tho surroundings were sharp". NASA catalog ID #563, NASA weight=4 (high). ALPO/BAA weight=2.
Plato 1982 Nov 24 UT 22:00-23:30. K.P. MArshall (Columbia, 12" reflector, x100, x200, x480, seeing III, reasonably steady, but some turbulence. No craters could be seen on Plato's floor, despite observing conditions being acceptable. The floor was evenly toned, and the walls were sharply defined. By 23:10 there was a suspicion that the central craterlet was there, but he could not quite make it out, even with averted vision. ALPO/BAA weight=1.
Alpetragius 1889 Sep 4 UTC 02:30-03:00 Observed by E.E. Barnard (Lick Observatory, CA, USA, 36" refractor x150, x700) "Shadow of CP diffused & pale. Entire inside of crater seemed filled with haze or smoke. Shad. of E.wall was black & sharp. CP & floor seen thru haze. No other craters showed this appear. (date&time rep't=Sep3, 1830L.T)." N.B. Sun above the horizon at 02:30 - sun sets at Lick at 02:37! NASA catalog weight=4 (good). NASA catalog ID #264. ALPO/BAA weight=3.
On 1988 Jul 23 at UT03:07 D. Darling (Sun Praire, WI, USA, 12" reflector, x150, seeing = 6/10) discovered that the dark area on the floor of Proclus, seen earlier by UK observers was still present, but less so (?) and the shape changed. When viewed through a green filter it was less distinct. "Change with two other filters. Polarizer gave a circular shape with a knot on SE side & W58 in White." The measured brightness of Proclus was 9 on three sides and 8.5 on its west rim. The floor was 5.5, but the dark spot was 4. Alphonsus, Bullialdus, Copernicus, Eratosthenes, Plato and Ptolemeaus were all normal. The Cameron 2006 catalog ID=332 and the weight=1. The ALPO/BAA weight=1.
Tycho observed by G. North (UK) seen to have greyness inside parts of its shadow. Confirmed by J.D. and M.C. Cook Possibly light scattered of illuminated wall into shadow or highland starting to break through the shadow. ALPO/BAA weight=1.
On 1986 May 18 at UT 20:45-22:25 M. Mobberley (Suffolk, UK, seeing II- IV) found that the central craterlet of Plato was an Žasily seen "white splodge" although it was quite difficult to see when imaged with video. Foley and Cameron comment on IR sensitivity of the CCD camera used. The Cameron 2006 catalog ID=285 and the weight=1. The ALPO/BAA weight=1.
On 1988 Jul 24 D. Darling (Sun Praire, WI, USA, 12" reflector, x150, S=7/10, T=3) observed the following in Proclus: "At 0213 the previously observed gray area was 1/3 of July 22 and V shaped and fanned out across the floor. Could see hint of knot seen before. Craters named in 7/23/88 (#319) were all normal this time too". Is it possible that this report refers to the crater "Gray" rather than "Proclus" as the column field suggests in the Cameron catalog? The Cameron 1978 catalog ID=333 and weight=5. The ALPO/BAA catalog weight=2.
On 1981 Sep 08 at UT 21:28-21:34 P. Madej (Huddersfield, UK, seeing III-IV and trasnaparency good) observed a light orange transparent cloud extending from the north east inner corner across over the floor of Plato. Camero comments that this report was confirmed by 3 othr observers. The shape of this clud varied. The Cameron 2006 catalog ID= 153 and weight=4. The ALPO/BAA weight=3.
Dawes 1973 Feb 12-23 UT 22:30-01:20 Observed by Porter (Narragansett?, RI, USA, 6" reflector x96, S=9, T=0-4, alt=55-75deg?) "Brightening of some of permanent pts. monitored while others stayed steady & normal brightness. (Other nites' obs. suggest that he saw end of dimming event & return to normal). Distinct fluctuations." NASA catalog weight=4 (good). NASA catalog ID #1361.