On 1981 May 12 UT 22:45-2325 M.C. Cook (Frimley, UK and using a 12" reflector), noticed that Censorinus was very bright, fuzzy and occasionally brighter than Proclus. However both Foley (Kent, UK) and Amery (Reading, UK) using a C.E.D. found that Proclus was brighter than Censorinus as it had been during April and May 1981. However Chapman obtained the reverse of this. Cameron 2006 extension catalog ID=138 and weught=3. ALPO/BAA weight=1.
On 1981 May 12 UT 22:00? M.C. Cook (Frimley, UK and using a 12" reflector), noticed that Censorinus was very bright, fuzzy and occasionally brighter than Proclus. However both Foley (Kent, UK) and Amery (Reading, UK) using a C.E.D. found that Proclus was brighter than Censorinus as it had been during April and May 1981. However Chapman obtained the reverse of this. Cameron 2006 extension catalog ID=138 and weught=3. ALPO/BAA weight=2.
On 1989 Dec 06 at 23:09-23:34UT D. Darling of Sun Praire, WI, USA (3" refractor x36 and x90, and then a 12.5" reflector at x64, S=7/10 and T= 4, saw dark spots in Proclus (not as dark as those from 5th Dec 1989). Two telescopes were used and the bigger of these revealed some shading on the floor of Proclus approximately a third as intense as he had seen the previous night. A sketch was made. The TLP finished by 22:34UT. Cameron comments that the dark patches could not be due to shadow as the altitude of the Sun was too high at proclus. The Cameron 2006 extension catalog ID=383 and the weight=0. The ALPO/BAA weight=2.
Proclus 1976 Jul 06 UT 01:35 Observed by Bartlett (Baltimore, MD, USA, 3" refractor, 40-450x, S=6, T=3) "Nothing vis. on floor (albedo=2 deg?) (usually features are vis.)" NASA catalog weight=4 (high).NASA catalog ID #1437.
In 1952 Nov 26 at UT 01:00? Carle (USa, 8" reflector, x700, seeing = excellent) observed the following in Plato: "Sketch shows 8 spots -- 5 craters showed interior shad., 1 completely filled, but no others seen despite several hrs. of study. Spots that should have been seen were missing. poor seeing converts floor into shimmering shapeless blob. Has observed it under good seeing & seen nothing on fl. as others have noted". The Cameron 1978 catalog ID=555 and weight=3. The ALPO/BAA weight=2.
On 1955 Aug 27 at UT 01:51 McCorkle (Memphis, Tennessee, USA, 6.5" reflector, x200) observed a 2nd magnitude bright flare on the dark side of the Moon. This remained steady, fading slightly before abruptly disappearing. Cameron suggests that this might have been a meteor. The Cameron 1978 catalog ID=604 and weight=0. The ALPO/BAA weight=1.
Although the crater was on the night side, a small bright spot was seen. This was blue, almost UV, and equivalent to a star of magnitude 2. It flashed over intervals of about 30 seconds and changed in colour from UV to blue. The BAA Lunar Section TLP network was alerted. Mobberly and J.Cook did not see much although J. Cook may have seen something, but located else where? Cameron lists this as a confirmed? observation? The Cameron 2006 TLP xtension catalog has this TLP with an ID No. of 258 and a weight of 4. The ALPO/BAA weight is 2.
Ross D 1964 Apr 21 UT 04:23-05:01 Observed by the Capens (CA, USA, 16" and 6", seeing 3-5, transparency 5+) "Obscuration of its rim" NASA catalog weight=4. NASA catalog ID #808. ALPO/BAA weight=2.
On 1983 Apr 21 at UT 21:55-22:05 N. King (Winersh, Berkshire, UK, using a 150cm f/8 reflector, with seeing I and transparency good, little spurious colour, just a little in Plato). Although observing since 21:25UT the observer noticed a just detectable faint green colour just after the dark shade around the inner eastern crater rim. The effect faded and by 22:05UT had completely gone. This report is not in the Cameron 2006 catalog. It is a BAA report. The ALPO/BAA weight=2.
On 1979 Jul 03 at UT 20:55-21:20 J-H. Robinson (Teighmouth, Devon, UK, 10" reflector, seeing II) observed that Messier was brighter than Messier A. No colour was observed. The Cameron 2006 catalog ID is 58 and the weight=3. ALPO/BAA weight=1.
On 1995 Sep 03 at UT19:40-20:15 P. Moore (Selsey, UK, 15" reflector at x400) observed that the floor of Plato was much darker than he would normally expect and futhermore no interior craterlets were seen. there was however a white patch that was barely visible at the location of the central craterlet should have been. G. North (UK) attempted to observe nut the Moon was too low and seeing terrible. F. Doherty reported Plato normal. Cameron 2006 catalog ID=475 and weight=3. ALPO/BAA weight=1.
Alphonsus 2004 Feb 29 UT 19:00-19:15 Observed by Brook (Plymouth, England, 60mm OG x120) "Checked central peak of Alphonsus using 60mm OG x120 + right angle prism. Moon at very high elevation, seeing excellent once clouds had dispersed, transparency also excellent. Time of observation 19-00 hrs UT to 19-15 hrs UT. Noticed fluctuation of brightness of A's central peak compared with the peak of Arzachel. Alphonsus' peak generally brighter." BAA Lunar Section report. ALPO/BAA weight=2.
On 1983 Feb 21 at 20:00UT P.W. Foley (Maidstone, Kent, UK, 12" reflector) noticed a deep steel blue colour inside Toricelli B with a lighter colour about 10-15 miles outside. Foley came to the conclusion that this was too visible for its size. Cameron 2006 Catalog extension ID=206 and weight=3. ALPO/BAA weight=2.
On 2010 Aug 19 at UT 00:50-01:02 J.Albert (Lakeworth, FL, USA, C11, Transparency 3, Seeing 7-8, 86F and very humid. Oberver checking out repeat illumination condition appearence for Tycho concerning LTP #468 in the 1978 Cameron catalog. Did not see the effect from the original TLP report, but did see, immediately at looking at Tycho a very faint hint of redness in a pencil thin arc (< 1/4 circumference of the rim) confined to the top of the rim of the well-lit north east wall. Coloured arc similar in thickness to Rupes Recta, but not as sharply defined. The outer (E) edge was perhaps sharper than the inner edge. The redness was more on the inside of the top of the rim. The outside of the rim was bright white. This effect was seen in three different eyepieces, at 311x, 224x and 400x. Checked for the effect on other craters nearby but could not see this effect anywhere else. The colour had dissapeared by 01:02UT. The fade took about 1-2 minutes. Observation of Tycho continued until 01:06UT, but all seemed normal. Quick checks were made again on Tycho periodically until 02:50UT but the colour was not seen again. ALPO/BAA weight=3.
A region of the Mare Imbrium was extremely bright, giving a reading of 8 out of 10 on the Elger scale. Cameron notes that from photos of the Full Moon, the area appears to normally be the brightness of Archimedes floor i.e. 3.5 out of 10 on the Elger scale. Atmospheric seeing was excellent and the observer could see a lot of fine detail with their 2.4" and 3" refractors. Cameron 2006 catalog extension ID=62 and weight=3.
2004 Jan 02 UT 09:05 (approx) M. Collins (Palmeston North, New Zealand, ETX 90, seeing 3, clear) saw a possible(?) flash north of Carlini D at about 16W, 35N in adverted vision. It lasted only a split second. The ALPO/BAA weight=1.
Williams of the UK, on 1892 Aug 23 at Moon's age 10.0 days, noticed a spot now rated at +1.5 (in brightness) that had been seen on the 21st Aug, near Picard. Williams comments that this is the only obsewrvation that departs "much" from the curve of diurnal brightness. The spot was descibed as "nearly as large as Picard and nearly half as bright. 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.
Observed by Chernov (Russia) "A periodic change in shape of small dark spot at bottom of round spot further N. adjacent to inner wall. It was larger than in proceeding months at same sun elev." NASA catalog weight=2 (low). NASA catalog ID #669.
The UT given in the Cameron 2006 extension catalog are: 20:58, 23:25- 02:20 and 01:40-04:00, however it is not clear what UT applies to which of the observers or the two features reported as having TLP on that night. On 1984 Feb 12-13 Marshall (South Anerica, seeing=III-II) noticed that Moltke was very bright with a fuzzy violet hue - he had never seen it like this before. Cameron 2006 catalog extension TLP ID= 240 and weight=2. ALPO/BAA weight=3.
The UT given in the Cameron 2006 extension catalog are: 20:58, 23:25- 02:20 and 01:40-04:00, however it is not clerr what UT applies to which of the observers or the two features reported as having TLP on that night. On 1984 Feb 12-13 Marshall (South Anerica, seeing=III-II) saw initially no craterlets in Plato, despite the Moon being at a high altitude. At 01:45UT the northwest corner of Plato was red. Again no other craterlets showed. He found the surrounding wall to be too bright and this was confirmed by Crater Extenction Device readings and had problems focussing on the crater. By 02:00-02:50UT he noticed variability in the visibility of the craterlets. By 03:48UT the central craterlet was much brighter than before and the crater doublet had brightened but the southern craterlet was still invisible. Cameron comments that Marshall was a very experienced observer. A. Cook (of Frimley, UK) obtained a photodiode line scan image of Plato. The brightness of the north west wall was brighter than the bright area on the west wall. Marshall and Mosely both saw a dark area on the floor of Plato close to the south wall (from clock position of 11 o'clock. There was a prominent white spot on the floor and the central craterlet was seen, but only under good conditions. Mosely does not discuss the west and north west wall brughtnesses that were seen earlier by Cook and Marshall. Cameron 2006 catalog extension TLP ID=240 and weight=2. ALPO/BAA weight=3.
Plato 1976 Sep 04 UT 02:35-03:35 Observed by Porter (Sarragansett?, Rhode Island, USA, 6" reflector x100, S=5, T=?) "At 0235h albedo of floor was est. at 3. At 0325h the pt. was albedo =1, 2 whole steps darker than earlier & noticeable to the obs. 10-15 min later it returned to normal. (the few meas. of albedo for this age were 1.5-2 which suggests that the meas. of 3 was the anomalous one. Another pt. did darken -- as reported). NASA catalog weight=3. NASA catalog ID #1448. ALPO/BAA weight=1.
On 1988 Dec 18 at UT20:25 W. Cameron (Sedona, AZ, USA - TV camera telephoto) noticed on a live TV shot of the Moon (apparently channel 3 TV broadcast at 11:25PM local time), that Proclus was brighter than Censorinus (or Dionysus) and was the brightest feature on the Moon. It was photographed from San Juan in Puerto Rico. Cameron 2006 catalog ID= 342 and weight=. ALPO/BAA weight=5. ALPO/BAA weight=1.
Ross D vicinity 1964 Apr 22 UT 05:43-0637 Observed by Cross et al. (Whittier, CA, USA, 19" reflector, x800-1200 & filters, S=7- 8, T=1) "Gas cloud over it & its companion; everywhere else was fine detail" NASA catalog weight=5. NASA catalog ID #809. ALPO/BAA weight=3.
Daniell 1979 Jul 04 UT 20:40-21:19 Observed by Saxton (UK?, 216mm refractor?, seeing III, transparency: Good) "noticed that the east end of Daniell was bright and fuzzy and had somewhat poorly defined edge to the bright part. A sketch was made, and possibly shows the same as in past reports" BAA Lunar Section Report. Cameron 2006 extension catalog ID=59 and weight=3. Observer located in Leeds, England and used a 9" reflector x250. Seeing=III and transparency=good. ALPO/BAA weight=2.
Aristarchus, Schroter's Valley, Herodotus 1881 Aug 06 UT 00:00? Observed by Klein (Cologne, Germany, 6" refractor, 5" reflector) "Whole region between these features appeared in strong violet light as if covered by a fog spreading further on 7th. Examined others around & none showed effect. Intensity not altered if Aris. placed out of view." NASA catalog weight=4 (high). NASA catalog ID #224. ALPO/BAA weight=3.
Plato 1982 Jun 02 UT 22:00. Mobberley could not see the central craterlet on the floor of Plato tonight. Foley notes that he could only just see the central craterlet on nights of 2-5th Jun and it was of reduced in brightness from normal. North reported that the floor seemed nearly black, but brighter in a green filter (x144 magnification used). All three observers compared the Plato area to other areas for reference. All the above seems normal, apart from the floor being brighter in the green filter. Cameron 2006 extension catalog ID 170 and weight=5. BAA/ALPO weight=1.
A blue tinge was seen inside and outside the crater perimeter. The surrounding halo lost brightness that was observed on 1993 Jan 29. Observed on Apr 19, 20 and 28th. Cameron 2006 extension catalog ID=213 and weight=5. ALPO/BAA weight=3.
On 1982 Apr 04 at UT 23:30-00:25 P. Madej (Huddersfield, UK, 7cm refractor & 16cm reflector) noticed the TLP in his refractor first of all at x25. So stepped up the magnification to x111 and found the crater brightness not what he was expecting. He tried different filters but found no difference in brightness. With the 16cm reflector however some changes in brightness were dected. The crater has a very pale yellow colour and it was slightly darker than Lacus Somniorum. P. Foley tried to confirm at 00:09 but the crater looked normal then. The Cameron 2006 catalog extension TLP ID is 167 and weight=3. ALPO/BAA weight=2.
Furnerius 1961 May 26 UT 02:20-03:00 Observed by Cameron (Aldephi, MD, USA, 3.5" Questar reflector x160, S=G) "Crater stood out like glittering points (small craters on rim?). Many features examined but effect seen only on this crater and Stevinus (Specular refl. from flat surface?)" NASA catalog weight=1 (very low). NASA catalog ID #738.
On 1990 Jan 07 at UT 20:20-20:58 G.North (Herstmonceux, UK) thought that he detected dullness in Torricelli B crater - Cameron comments that this cannot be shadow). The Cameron 2006 catalog ID=386 and the weight=3. ALPO\/BAA weight=2.
Brilliant blue color seen at first for seconds, later for min 2h later, in blue filter. Cameron 1978 catalog weight=4 (high). Cameron 1978 catalog ID 572.
Tycho 2971 Nov 28 UT 21:58-22:05 observed by D.B. Taylor (Dundee, UK, darker area inside the crater (NE and SE floor) in a Moon Blink device. However the observer does not report through which filter ir was darker. ALPO/BAA weight=1.
Stevinus 1961 May 26 UT 02:20-03:00 Observed by Cameron (Aldephi, MD, USA, 3.5" Questar reflector x160, S=G) "Crater stood out like glittering points (small craters on rim?). Many features examined but effect seen only on this crater and Stevinus. (Specular refl. from flat surface?)" NASA catalog weight=1 (very low). NASA catalog ID #738.
Aristarchus, Schroter's Valley, Herodotus 1881 Aug 07 UT 00:00? Observed by Klein (Cologne, Germany, 6" refractor, 5" reflector) "Whole region between these features appeared in strong violet light as if covered by a fog spreading further on 7th. Examined others around & none showed effect. Intensity not altered if Aris. placed out of view." NASA catalog weight=4 (high). NASA catalog ID #224.
On 1933 oct 01 at UT 03:00 Rawstron (USA, 4" refractor, x330) observed the following in Mons Pico B: "Haze -- much narrower & elongated than on Sep. 1". The Cameron 1978 catalog ID=407 and weight=3. The ALPO/BAA weight=2.
Observed by Haas (Las Cruces, NM, USA) "Temporary greyness seen in interior shadow." ALPO/BAA weight=3.
On 1955 Oct 28 at UT00:00? Kozyrev (Crimea, Soviet Union, 50" reflector) detected in Aristarchus Fraunhofer lines in UV spectra that were much narrower than in the solar spectrum. This indicated luminescent glow which overlapped contour(?) lines. Greatest after Full Moon, but fluctuated monthly with no indication of solar activity effect. The Cameron 1978 catalog ID=621 and the weight=5. The ALPO/BAA weight=5.
On 1955 Oct 28 at UT 00:06 W. Taylor saw a naked eye flash on the Moon in the north east area, on the edge of Mare Vaporum. The flash was intense and radiated to a large area. The duration was 1/4 seconds.
Aristarchus 1981 Mar 17 UT 22:40-23:25 Observed by Moore (Selsey, England, 15" reflector, seeing III) "Aristarchus very bright according to Crater Extinction Device and a coloured blink detected" BAA Lunar Section TLP report. ALPO/BAA weight=1.
On 2016 Jun 17 UT 05:00 A.Anunziato (AEA, Argentina Meade ETX 105, seeing 7/10, sketch made) observed a very tiny light spot where the shadow from topographic relief to the south of Vallis Schroteri nerges into the crater rim shadow on the floor of Herodotus. There should be no light spot here. ALPO/BAA weight=1.
Aristarchus Area 2004 Nov 22 UT 04:58-05:49 Observed by Gray (Winemucca, NV, USA, 152mm f/9 refractor, seeing 4-5, trasparency 4-5, x114, x228) "Blinked Herodotus with Wratten filters Blue 38A and Red 25. The illuminated west crater wall stood out brilliantly in blue light, much more so than in white light. This was true also of Aristarchus. Red light did not increase contrasts in Herodotus any more than they were in white light. Shadows in Herodotus appeared as black as the night west of the terminator and remained that way throughout the observing period. No TLP seen in Herodotus tonight. A possible TLP was seen to the west of Herodotus near the terminus of Schroters Valley. It was noted at the beginning of the observing period that there were four very bright spots of light, one near the end of Schroters Valley, the other three grouped together a little farther north. Although not far from the terminator they were definitely east of it. It was noted that all of them nearly vanished in the Blue 38A filter while Aristarchus and the rim of Herodotus gleamed brilliantly. At 5:19UT it was noted that the most brilliant of the four lights, the one near the terminus of Schroters Valley, had faded almost to invisibility in white light. When first seen it had been brighter than Aristarchus. It remained very dim after this through the remainder of the observing period, and was unchanged at 7:35-7:49UT when I again examined the area. The other three bright spots remained brilliant and unchanged."
Aristarchus 1973 Aug 10 UTC 20:14 observed by Baumeister (48.63N, 9.25E, 110mm reflector, T=2, S=2) "Orange to red colours at the crater floor disappeared until 21:04" - Hilbrecht and Kuveler, Earth, Moon & Planets, 30 (1984), p53-61. ALPO/BAA weight=2.
Plato 1973 Aug 10 UT 22:45 observed by Robinson (Devon, UK). Observer noticed that the lighter areas on the floor were more distinct in red than in the blue filter. ALPO/BAA weight=1.
All observers saw a blue tinge seen inside and outside the crater. Marshall observed a bright spot in the middle of the crater floor and thought perhaps that it was a central peak. No central peak can be found on Lunar Orbiter images. Cameron 2006 Catalog extension ID=214 and weight=5. ALPO/BAA weight=4.
Proclus 1976 Sep 06 UT 02:00 Observed by Bartlett (Baltimore, MD, USA, 4.5" reflector 45-300x, S=3, T=5) "Nothing vis. on floor of 2deg brightness. Usually floor ray & Proc. A are vis. at this col. & c.p. is 5 deg bright. (must have been 2 deg tonite)." NASA catalog weight=4. NASA catalog ID #1450.
Gassendi 1939 Aug 27 UT 02:00 Observed by Haas? (NM? USA, 12" reflector?) "NE part of c.p. was I=6.4, compared with I=9.4 on 9/28/39 (see #462) under similar cond.@ NASA catalog weight=4 (high). NASA catalog ID# 458.
Cobra Head, Aristarchus 1964 Feb 25 UT 02:37-02:38, 02:39-02:42 Observed by Budine (Binghamton, New York, USA, 4" refractor, x250, S=6, T=4) "Red flashes" NASA catalog weight=3 (average). NASA catalog ID # 802.
Blanco, J. Vidal, of Gijon, Spain (3" refractor x72) noticed an unfamiliar very bright center near to Encke. Cameron suspects that this was Encke B crater on the basis that it is a prominent small crater near to Encke. Cameron 2006 catalog extension ID=410 and weight=2. ALPO/BAA weight=1.
Proclus 1972 Dec 17 UTC 18:30 Observed by Farrant (Cambridge, England, 8.5" reflector) "Crater appeared very bright (Apollo 17 Watch)." NASA catalog weight=2 (low). NASA catalog ID #1359.
Crick of Belgium noticed obscuration on a bright spot on the south east wall. This spot was quite prominent through a red Wratten 25 filter. The floor was very dark. Other craters were checked and were normal. A sketch was supplied and the position was the same as in other earlier reports. Cameron 2006 catalog extension ID=60 and weight=3. ALPO/BAA weight=3. 6" reflector used. Seeing=II and transparency=good.
Plato & Pico 1984 Mar 14/15 UT 19:18-01:48 Observed by Foley (Kent, England, 12" Reflector seeing I, Transparency Very Good) "Obscuration and colur seen on Plato and colouration and brightness seen on Piton (CED used)" BAA Lunar Section Report.
Plato & Pico 1984 Mar 14/15 UT 19:18-01:48 Observed by Foley (Kent, England, 12" Reflector seeing I, Transparency Very Good) "Obscuration and colour seen on Plato and colouration and brightness seen seen on Piton (CED used)" on and Colour" BAA Lunar Section Report.
M. Cook of Frimley, "NE ray distinct & also floor E of it, not distinct as on Dec 13 & Jan 11, while March 10, 11 & 12 seen by Price, North, Peters, Foley & M Cook, where rim was clear and sharp." - quote from the 2006 Cameron Catalog extyension - TLP ID=297 and weight=5. Cameron gives the observers confirming this TLP as: M. Cook, G. North and Davies.. ALPO/BAA weight=3.
Amery (Reading, England) saw blue in Aristarchus but a photograph did not show the colour. Foley thinks this was spurious colour. Cameron 2006 extension catalog ID=27. ALPO/BAA weight=1.
Peter Foley observed a tiny yellow-brown region close to the tip of the cape, north east of the precipitous west edge, in the face of the north facing slope. The area concerned was diffuse and varied in density despite the surroundings not varying. Foley notcied no colour elsewhere on the Moon, though Amery thought that he saw some in Aristarchus, but Foley thinks this was spurious. Cameron 2006 catalog extension ID=27 and weight=5. ALPO/BAA weight=3.
Flashing spot at end of SV fluctuated. Herzog, Darling & Weier confirmed spot but not fluctuation. Spot brighter in red than blue, but Cobra Head was bright in blue. No other region was abnormal.
Peter Foley (Kent, UK, 8" reflector, seeing=II) noticed that the floor beneath the north wall, and the area over the north wall were indistinct (almost out of focus). Despite looking elsewhere in the crater and surrounds, no other blurring (obscuration of detail) could be seen, indeed everywhere else was sharp and detailed. Foley tried several eyepieces but this made no difference. He used a crater extinction device but found no variations in brightness. There was a slight darkening when he used a red filter in the Moon Blink device. The obscuration effect weakened between UT20:56 and 21:10, was difficult to see at 21:13 and had finished by 00:15. Patrick Moore (12" reflector, Dublin, Ireland) saw nothing unusual when he started observing at UT 22:00. Cameron says "Photos marked at location of phenomenon". Cameron 2006 extension catalog ID=37 and weight=5. ALPO/BAA weight=3.
On 1980 Apr 28, Louderback (South Bend, WA, USA using a 8" reflector and a 2.5" refractor) observed a very bright reg region on top of the south west rim of Aristarchus crater. This was on the same side as the ray system between Aristarchus and Herodotus. Louderback noticed some chromatic aberation - blue where he had seen the red patch before. Louderback suspects chromatic aberation was the cause although did not see red in that region ever again. "Patch was between his observation points A and C. Point C was 5 points brighter in the red filter than in the blue." A sketch was made. Cameron suspects that the TLP was real. Cameron 2006 TLP catalog extension ID=92 and weight=3. ALPO/BAA weight=2.
On 1821 Jan 16 at UT 21:00 S. Cooke (Stonehouse, UK) An effusion of smoke effect, which lasted about a minute, seen. It appeared like the fluttering of a bird and passed over the Moon before it evaporated, and must have been foreshortened, as it seemed in effect to have passed over the whole disc, starting from west of Menelaus, and near Plinius. ALPO/BAA weight=1.
Aristarchus-Cobra Head, 1967 Nov 15 UT 05:40-06:00 Observed by Cross, Tombaugh (Las Cruces, NM, 12" reflector x800) and Harris (Tucson, AZ), and Dunlap (Organ Pass, NM, 24" reflector with Moonblink). "Obs. reddish color N. & E. of Aris. & more intense color nr. E.(IAU?) rim of Cobra Head. Red color nr.C.H. confirmed by Tombaugh. Obtained 10 photos between 0543-0549h in 3 spectral bands (blue, yellow, red, & integ. light). No change dur. obs. per. but spot got smaller at moments of good seeing. Isodensitometry of photos. At Corralitos 0152-0155 on 24- in image intensifier & filter sys. photoos at 0320-0330h. Harris at Tucson got spectra. Neither of latter 2 show anything unusual. Its edges were nebulous even at best seeing. Size @ that of Cobra's Head." NASA catalog weight=5 (very good). NASA catalog ID #1053.
Louderback observed that the south west wall was a creamy deep yellow. There was also strong fluorescent blue on the west wall of the Cobra Head - Schroter's Valley area and this was similar to the violet glare seen on Aristarchus at times. Violet was seen between Aristarchus and the Cobra Head. Seeing coditions were poor. Brightening of a point near C occurred roughly every 10-15 seconds and lasted 0.5 sec - (Cameron concludes that this was not due to the Earth's atmosphere). A 0.2 step drop in brightness was seen on point A (twin spots). Point C had reduced by 0.6 steps. Elsewhere was stable in brightness. Cameron 2006 catalog ID=281 and weight=4. ALPO/BAA weight=3.
Aristarchus normal in red and blue filters however the Cobra Head part of Schroter's Valley was brighter in blue. Indeed it was very dull in red - Louderback says that this was not surprising as the whole areas around Aristarchus is brighter in blue. Louderback is an experienced observer of the Aristarchus area of more than 10 years. Cameron 2006 extended catalogID=63 and weight=1. ALPO/BAA weight=1.
Variations in vapor column rising from the Cobra Head feature (seen on several nights in succession) and also in the visibility of craterlets A, C, F. Sunrise +2d. (time est. fr. gives colongitude). Cameron 1978 catalog ID=279 and weight=3. Pickering was observing from the southern station of Harvard University in Arequipa, Peru.
Manilius 1939 Jun 30 UT 06:05 Observed by Haas (NM?, USA, 12"? reflector) "Dark area in S. part was I=2.0 but was I=3.7 on 7/30/39. Obs. conditions were very similar." NASA catalog weight=4 (high). NASA catalog ID #449.
Plato 1937 Jul 22 UT 06:20 Observed by Haas (Alliance, Ohio, USA, 12" reflector?) "Floor distinctly greenish, but was gray on June 23, 1937 at 0430 & col.84 (normal?)" NASA catalog weight=4 (high). NASA catalog ID #421. ALPO/BAA weight=3.
On 1982 Jun 05 at 22:00? UT, Chapman (UK, using a 12" reflector), again using a x2 yellow filter, noticed that the central craterlet detectabilty changed such that sometimes it was visible and sometimes not. Foley (Kent, UK)noticed that the central craterlet could only just be seen between June 2 to June 5 and was much less discernable than during the previous lunation. No CED brightness measurements made. The floor of Plato was noted to be very dark though. Cameron 2006 catalog ID=172 and weight=4. ALPO/BAA weight=2.
Plato 1916 Oct 10 UT 21:00? Observed by M, Maggeni (Florence Obs., Italy) "Reddish shadow spread over part of crater. Looked like vapor (like nitrous vapor) and obscured underlying craters. The Cameron 1978 catalog weight=3 and ID = 365. The ALPO/BAA weight=3.
Bailly 1974 Oct 29 22:00-23:00 Observed by Lord (St Annes-on- Sea, UK), 25cm reflector, x125 & x400,seeing III, transparency 5/5. South west floor was darker in a blue filter than in other filters. Observer thought this was due to a natural green colour here. Had seen this on 3 other occasions under early morning illumination. ALPO/BAA weight=1,
Aristarchus, Cobra Head, 1969 Dec 23 UT 05:19-05:34 Observed by A.R. Taylor (Buckinghamshire, UK, 8.5" reflector, 240x, Wratten 25 and 80B) Strong blink in crater at 0519. All traces gone by 0534. Could only see in filters, Plato, Copernicus, Gassendi all normal. Obscur. also in Cob. Head." NASA catalog weight=4. NASA catalog ID #1230. 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.
Four bright spots seen in Mare Crisium. There was also peculiar behaviour of the terminator. Source: Midlehurst 1968 catalog TLP ID=16. Ref Web 1962 p62-76. The ALPO/BAA weight=1.
On 1966 Apr 12 at UT 01:05-01:23 Whippey (Northolt, England, UK, 6" reflector x212) and Corralitos Observatory (Organ Pass, NM, USA, 24" Moon Blink) observed in Gassendi: "Abrupt flash of red, settling immediately to a point of red haze near NW (IAU?) wall. Continuous till 0123h. (Not confirmed at Corralitos Obs. MB--at same time?". The Cameron 1978 catalog ID=927 and weight=3. The ALPO/BAA weight=2.
On 1913 Mar 20 at UT 19:00? Franks saw the south horn of the Moon to be prolonged along the Leibnitz Mountains as a feeble line of light well into the dark side. The Cameron 1978 catalog ID=335 and the weight=1. The ALPO/BAA weight=1.
On 1966 Apr 24 at 21:30UT R.Livsey (Scotland, 6" reflector at x275) observed that Aristarchus was "fluorescent" in Earthshine. It is uncertain whether the description of "fluorescent" should be involve this observation being categorized as a TLP, however just for safety it will be assigned an ALPO/BAA weight=1. This was a BAA Lunar Section report.
On 2003 May 05 at UT 19:12:50 and 19:17:45 R. Lena (Italy) saw faint flashes (possible optical illusions) at these times in Mare Vaporum in Earthshine. The ALPO/BAA weight=1.
On 2003 May 05 at UT 19:50 P.G. Salimbeni (Italy) saw a faint flash (possible optical illusion) near to Pallas in Earthshine. The ALPO/BAA weight=1.
Macrobius 1938 Jun 02 UTC 18:00? Observed by McLeod (England? 5" ? reflector) "Changes in dark areas. (near Proclus where Green saw phenomenom. see #443)" NASA catalog weight=2 (low). NASA catalog ID # 444.
On 1983 May 17 at UT20:13-20:40 P. Madej (Huddersfield, UK, x38 and x63) found that Aristarchus was normal in appearance, but at 20:19 a blood red disk was seen as bright as a 6th magnitude star. The colour did not vary but the brightness changed from 4 to 8 over a 1.5-3min period, on the south west wall. Foley (Kent, UK, 12" reflector)observed Aristarchus at 22:10 and noted that it had the same rose-violet colour as had been seen by him a day earlier. The Cameron 2006 catalog ID=220 and the weight=0. The ALPO/BAA weight=3.
Theophilus 1964 May 18 UTC 01:05-01:15 Observed by Dieke (Baltimore, MD, USA, 6" refractor, x125) "Crescent of crsimson color on SW between rim & flor. Was not present at 0500, nor did it reappear from 0115 to 0245h" NASA catalog weight=3 (average). NASA catalog ID #812.
On 1981 Feb 10 at UT21:46-21:49 P. Madej (Huddersfield, UK) found a 2nd mag star-like point on the north east wall of Aristarchus crater. M. Price (Camberley, UK) at 21:46 and 21:49. North (UK) detected flashes from the central peak. Foley saw Aristarchus as a "translucent glow". Moore, Pedler and Ratcliff could not find Aristarchus. Earlier though Amery (Reading, UK) had found Aristarchus to be sharply defined. Cameron 2006 catalog ID=122 and weight=5. ALPO/BAA weight=3.
On 25 Jun 1993 at UT 23:30-23:52 Carlos Colesanti (Mairinque, Brazil) obtained two CCD images of Julius Caesar crater and noticed a brilliant fuzzy area on the rim of the crater. This appeared in both images and resembled a fuzzy white blob. Note that this is a REA-Brazil observation. ALPO/BAA weight=1. Cameron (2006) ID=463.
Near Ross D (23E, 12N) 1964 May 18 UT 03:54-04:53 Observed by Harris, Cross et al. (Whittler, CA, USA, 19" relector x720, 8" reflector x322, S=G) "White gas obscuration. Moved 20mph, decreased in extent. Phenom. repeated. Drawing." NASA catalog weight=5. NASA catalog ID 811. ALPO/BAA weight=4.
White spot near Censorinus 1966 Dec 18 UT 23:40-23:46 Observed by Enie (Pittsburgh, Pennsylvania, USA, 8" reflector x100, S=G) "Attention drawn to pink color in this usually white patch. Brightened to a light reddish tinge for 2 mins, then faded back to pink, then to white, Sketch." NASA catalog weight=4 (high). NASA catalog ID #1002.
Linne 1867 Aug 06 UT 21:00? Observed by Buckingham (England?) "Crater in darkness, he saw a "rising oval spot". Other obs. saw it as a triang. Bold black spot pointing to earth, slowly diffused white & drift of white on slope of pyramid. (indep. confirmation?)" NASA catalog weight=5 and catalog ID #155. ALPO/BAA weight=2.
On 1888 Jul 16 at UT 05:35? Holden, at Lick observatory, CA, USA saw a "Lunar Volcano, 1st magnitude star on the dark side. Yellow light tinged with red from refractor's secondary spectrum (facet glint? or peak catching sun before others? Hunt saw similar phenomenon in 1863." Corliss states that it was later revealed to be a mountain ridge near the southern termination of the Alpes. Cameron 1978 catalog ID=357 and weight=1. ALPO/BAA weight=1.
Plato 1964 May 20 UT 01:00-01:30 Observed by Bartlett (Baltimore, MD, USA, 2.4" refractor x117, S=6, T=5). "Orange-red color on W. wall. Vivid" NASA catalof weight=4 (high). NASA catalog ID #813.
Alphonsus 1966 Apr 28 UT 21:58 Observed by Smith (England, 10" reflector) and Corralitos Observatory (Organ Pass, NM, USA, 24" reflector+Moon Blink) "Reddish patches, (not confirmed at Corralitos with MB tho they give feature as Gassendi in their report)." NASA catalog weight=2. NASA catalog ID #930. ALPO/BAA weight=1.
Eratosthenes 1976 Jun 06 UT 02:01 Observed by Bartlett (Baltimore, MD, USA, 3" reflector x54-300, S=5, T=5) "Bowel was full of shadow but a small 5 deg bright spot on NE floor. Nothing seen in 1975 at nearly same col. but shadow was deeper." NASA catalog weight=4 (high). NASA catalog ID #1432.
Tycho 2003 May 09 UT 21:04 Observer Brendan Shaw (UK) "CCD image of central peak - Sun's altitude suggested that this should not have been directly illuminated this early - may have been from secandary reflectance off illuminated W wall?" ALPO/BAA weight=1.
Plato 1925 Jun 20 UT 20:00? Observed by Markov (Russia) "Light bands in bottom seen in shadow & did not seem to be elevations. These have been seen 5X from 1913-1922." NASA catalog weight=3. NASA catalog ID #391. ALPO/BAA weight=2.
Alphonsus 1990 Feb 03 UTC 20:05-21:22 Observed by Brook (Plymouth, UK, 10" reflector) "Brightness variance noted". The Cameron 2006 catalog does not have an entry for this observation. The ALPO/BAA weight=2.
Plato 1979 Apr 06 UT 18:00-21:00 Observed by Crick (Belgium, seeing II- III) Part of floor darker than normal and obscuration on inner west wall - the effect did not change during the observation. Drawing made. Cameron 2006 catalog ID=49 and weight=3. ALPO-BAA weight=2.
On 1989 Jan 16 at UT 20:00 G. North (Herstmonceux, UK, 30" reflector) observed Toricelli B to change in brightness and found colour in it. A 10 minute exposure spectrum was taken (Cameron does not have information on whether anything unusual was recoeded) before clouds obscured the Moon. Normally a 30 minute exposure would be needed. The Cameron 2006 catalog ID=345 and the weight=3. The ALPO/BAA weight=3.
Alphonsus 1966 Apr 20 UT 22:28 Observed by Smith (Nottingham, England, 10" reflector) Reddish patch possibly detected on SE flank of central peaks, but more dubious than that from 28th Apr. ALPO/BAA weight=1.
Aristillus 1939 Sep 23 UT 01:00 Observed by Haas? (New Mexico?, USA, 12" reflector?) "Dark area in W. part of floor had I=1.3. comp with I= 1.3, 3.7, 4.0 in #450, 454, & 459, respectively. (albedos disagree at same phases, so are real anomalies). (normal here?)." NASA catalog weight=4 (high). NASA catalog ID #461.
On 1987 Mar 09 at UT20:00 M. Mobberley (Sussex, UK) obtained some video of Mons Pico - apparently these show the mountain with a puzzling appearance (not sure whether it was the observer who claimed this or some one who analyzed the tape). The Cameron 2006 catalog ID=300 and the weight=5. ALPO/BAA=1.