TLP Repeat Illumination/Libration and Earthshine predictions for: Iceland - Reykjavik



Ill is percentage illumination of the Moon
*Indicates a repeat illumination and libration event to within +/- 1 deg for both
A non-* indicates just repeat illumination to within +/-0.5 deg


2021-Apr-15 UT 20:54-21:38 Ill=12% Promontorium_Agarum observed by Middleton_RW on 1967-1-14

     Cape Agarum 1967 Jan 14 UT 17:17-17:35 Observed by Middleton, 
     Colchester, England, 4" refractor, x240, S=G) "Cape was hazy or 
     obscured whereas Piccard, Pierce, & Cape Olivium were quite clear. Has 
     seen this area obscured many times" NASA catalog weight=3 (average). 
     NASA catalog ID #1008.


2021-Apr-15 UT 20:54-21:46 Ill=12% Gassendi observed by Kilburn on 1969-1-22

     On 1969 Jan 22 at UT 00:10-00:30 Kilburn (England, UK, 6" reflector 
     x192, English Moon Blink device) observed a colour blink on the outer 
     east wall of Gassendi. Cameron says: "in dark!". The Cameron 1978 
     catalog ID=1117 and weight=3. The ALPO/BAA weight=2.  


2021-Apr-15 UT 20:54-20:59 Ill=12% Aristarchus observed by Mackey on 1971-10-22

     Aristarchus 1971 Oct 22 UT 19:43-19:56 A.Mackay (Hatton, UK, 15cm 
     reflector, x50) observed a pale pink on the W(IAU?) half of 
     Aristarchus and a pale shade of blue on the E(IAU?) half. The 
     effect faded from 19:56UT onwards and had gone 2 minutes later. 
     No information on whether other craters exhibited this effect, 
     given. Burgess, who observed later did not see any colour. 
     ALPO/BAA weight=1.


2021-Apr-15 UT 20:54-21:27 Ill=12% Aristarchus observed by Foley_PW on 1980-4-18

     On 1980 Apr 16 at UT 20:00-22:20 P.W. Foley (Kent,UK, 12" reflector, 
     seeing II-III) found that Aristarchus could barely be seen. Therefore 
     it was not possible to take CED brightness measurements. Strangely 
     Cassini, Kepler, Plato and Mons Pico could be seen. However at 
     20:16 UT St Elmo fire-like flashes were seen coming from the interior 
     south east corner of Aristarchus at 20:16 UT and then the brightnesss 
     spread to fill the rest of he crater. Duration was about 5-20 sec 
     (Cameron comments: atmospheric effects?). The crater reached peak 
     brightness at 20:17UT (CED reading of 8). Foley comments that the 
     crater rim and area 16-24km around this (including Herodoyus) had a 
     translucent radiance. However at 20:25UT the brightness reduced 
     (including Herodotus) down to CED 3, however the blue radiance 
     remained. At 21:07UT Foley saw a star-like flash in the south east of 
     the floor (CED 3-4). Grimaldi was found to be of constant brightness by 
     comparison using the CED Brightness=2). At 20:20UT Amery (Reading, UK) 
     found Aristarchus to be a well visible circular fluorescent patch. At 
     20:40 Amery found the region between Aristarchus and Herodoutus was 
     glowing - appeared almost as a flare from Aristarchus and by 20:55UT 
     there was also a flare to the west of Aristarchus. At 20:27 Madej 
     (Huddersfield) detected only a slight glow from Aristarchus and the 
     region affected was small - indeed the glow had gone by 20:46. At 20:40 
     Ricketts detected a "continuous blue emission" - this had a cycle of 5-
     10 sec (Cameron comments: atmosphere?). Saxton (Leeds, UK) detected at 
     20:42 "translucent effects and variations" at 20:42 noticed a star-like 
     point. At 19:00-21:40 M. Price (Camberley, UK) decided that Aristarchus 
     was fainter in brightness than normal. Peters observed a faint nebulous 
     spot at at 20:25-21:00 that changed in brightness in an irregular way. 
     Cameron 2006 catalog ID=86 and weight=5. ALPO/BAA weight=3. 


2021-Apr-15 UT 20:54-21:56 Ill=12% Cassini observed by Amery_GW on 1980-4-18

     On 1980 Apr 18 at UT20:55 G. Amery (Reading, UK, 10" reflector, 50-
     200x, seeing III) individual features not seen near Cassini. Cameron 
     2006 catalog ID=86 and weight=5. ALPO/BAA weight=1.


2021-Apr-16 UT 20:57-22:18 Ill=19% Moon observed by Marokwic on 1881-9-27

     On 1881 Sep 27 at UT 19:00 Marokwic (South Africa) observed a comet-
     like object pulling across the Mon. The Cameron 1978 catalog ID=225 and 
     the weight=2. The ALPO/BAA weight=1.


2021-Apr-16 UT 20:57-21:07 Ill=19% Atlas observed by Osawa on 1968-12-24

     Atlas 1968 Dec 24 at UT 09:15-10:45 Osawa (Kyoto-Ken, Japan, 8" 
     reflector, 9mm Ortho, Seeing=5, later worse) saw a slight 
     brownish hue on the northern shadowy bed in the crater. It was 
     difficult to see the difference between the glow and chromatic 
     aberation of the eyepiece. The tint never showed up in filters. 
     The ALPO/BAA weight=1.


2021-Apr-16 UT 20:57-21:46 Ill=19% Aristarchus observed by Madej_P on 1980-4-19

     On 1980 Apr 19 at UT 20:37-20:49) P. Madej (Huddersfield, UK, 
     77mm refractor, x83 and x111) at 20:37 UT saw a slight glow at 
     x83, quite small in size. At 20:46UT no glow was seen at x83. 
     At 20:49 a slight glow seen again, but unclear and 
     illdefined - appeared larger in area at x111. Observatons 
     ceased at 21:56 dues to clid. ALPO/BAA weight=1. 


2021-Apr-16 UT 20:57-21:49 Ill=19% Taruntius observed by Buczynski_DG on 1980-4-19

     On 1980 Apr 19 at UT20:30-22:59. The following is quoted from the 
     Cameron 2006 catalog.... "(Buczynski) alerted by colleague (Greenwood) 
     who used filters W15 (IR), W25 (red), W44A (blue), & W58 (UV) and had 
     located a possible blink in it. (Bucz) used W15, W44A & W25. C.P was 
     very bright in W25 (red), dull but vis. In W44A (blue) & floor was 
     noticibly darker in W44A than in W25. Bright cp vis. In W15 & floor was 
     of a light shade. Other craters checked for color, none found. In 44A 
     floor lost some definition (gas?). Sketches from Bucz. & Greenwood. 
     (Pedler) at 2140, floor area around cp was seen in white & red as 
     normal but blink was vis in white, darker in blue. Checks of other 
     features were negative. (Amery) small dark center & small dark area - 
     not shadow - under S wall. N wall obscured by dark area extending N 
     onto surrounding mare. (normal?) which was difficult to focus (gas?). 
     At 2155 N wall now sharper & dark area less intense. Craterlet Cameron 
     in N wall clearly seen which was invisible 1/2 h earlier. (Saxton) 
     whole crater flashed and blinked at 2155. Could see detail in brighter 
     W 1/2 of crater - not seen earlier. At 2205 seeing poor, at 2215 it was 
     normal. (Blair) at 2155 used red & blue filters & in blue it was darker
     than in red. W. wall not well defined. (J. Cook) saw spurious color on 
     N & S rims. Saw a pink tinge on SE rim. (A. Cook) saw spur. Color on 
     most craters as seeing deteriorated. Got a blink on SE region > red 
     than blue". The Cameron 2006 catalog ID=87 and the weight=5. The 
     ALPO/BAA weight=3.


2021-Apr-16 UT 22:26-23:06 Ill=19% Proclus observed by Marchart on 1971-1-1

     Proclus 1971 Jan 01 UTC 19:00-20:25 Observed by Marchart (Aldershot, 
     England, 8" refractor x500). "Color patch on N wall, red & green on 
     inside, even tho eyepieces were rotated & changed. (chrom aberr. ?) 
     (experienced observer)." NASA catalog weight=1 (very low). NASA catalog 
     ID #1280.


2021-Apr-16 UT 22:35-23:06 Ill=19% Lacus_Somniorum observed by Arsyukhin on 1982-5-27

     On 1982 May 27 at UT 17:05-17:35 E.V. Arsyukhin (Moscow, Russia, 3"
     reflector) found Lacus Sominorum was very bright, misty and the colour 
     varied. It was back to normal on the 28th and abnormal on 29-31st. - 
     had a dark spot in the middle for about 30 min. The Cameron 2006 
     catalog ID=169 and weight=3. The ALPO/BAA weight=2.


2021-Apr-16 UT 22:40-23:06 Ill=19% Endymion observed by Arsyukhin on 1982-5-27

     On 1982 May 27 at UT 17:05-17:35 E.V. Arsyukhin (Moscow, Russia, 3" 
     reflector) found Endymion had a dark spot in the middle for about 30 
     min. The Cameron 2006 catalog ID=169 and weight=3. The ALPO/BAA 
     weight=2.


2021-Apr-16 UT 22:02-23:08 Ill=20% Earthshine: sporadic meteors

2021-Apr-17 UT 21:00-21:12 Ill=27% Copernicus observed by Cook_JD on 1980-4-20

     On 1980 Apr 20 at UT20:05-21:02 J.D. Cook (Frimley, UK, 12" reflector, 
     x60, seeing III-IV) at the start of this session found some bright 
     spots in the area of Copernicus, and at 21:02 detected some flashes in 
     this region. Cameron 2006 catalog ID=88 and weight=1. ALPO/BAA 
     weight=1.


2021-Apr-17 UT 21:00-22:19 Ill=27% Fracastorius observed by Robinson_JH on 1980-4-20

     On 1980 Apr 20 at UT21:12-22:45 J-H Robinson (Teignmouth, UK, 10.5" 
     reflector, x180) found, using a Moon Blink device, evidence of colour 
     on the flor patches of Fracastorius crater, brighter in blue than in 
     red. Also the floor to center varied in brightness in blue and in red. 
     Peters observed in white light and found the south east-south wall had 
     a slight orange cast and when a Moon blink was used it was less bright 
     in blue than in red light. M. Cook found spurious colour on the south 
     rim and also on Mons Pico. There was a colour blink reaction on the 
     southeast floor of Fracastorius - this was both faint and blurred and 
     not seen in white light. A.C Cook detected the permanent blink in the 
     south east floor of the crater at 21:47 and a fainter one in the north 
     west (marginally brighter in red than in blue). J.D. Cook found no 
     colour with the Moon blink device. 21:22-22:10 P.W. Foley got a strong 
     colour reaction with the Moon Blink device - brighter in red than in 
     blue and detected a pink colour visually on the south east wall 22:10-
     22:45 (this did not give a blink effect though). Cameron 2006 catalog 
     ID=88 and weight=4. ALPO/BAA weight=2.


2021-Apr-17 UT 21:00-21:34 Ill=27% Grimaldi observed by Price_M on 1980-4-20

     On 1980 Apr 20 at UT20:27 M.Price (Camberley, UK) saw a flash in the 
     Grimaldi-Aristarchus area. Cameron 2006 catalog TLP ID=88 and weight=4. 
     ALPO/BAA weight=2.


2021-Apr-17 UT 21:09-22:45 Ill=27% Petavius observed by Blair_G on 1980-4-20

     On 1980 Apr 20 at UT21:38-21:50, Blair of Renfrewshire, Scotland (used 
     an 8" reflector and seeing=III) saw three patches in Petavius and they 
     could still be seen 7 minutes later. At 21:50UT he used a filter and 
     found the "northern one was brighter in blue, the southern one was 
     brighter in red and the central one was the same shad ein both 
     filters." Cameron comments that the central patch was a permananent 
     one. She then goes onto say that the crater is described as having dark 
     patches that are opposite to what one would expect from Fitton's theory 
     applied to dark features. Cameron 2006 extension catalog ID=88 and 
     weight=4. ALPO/BAA weight=2. 


2021-Apr-17 UT 21:59-22:58 Ill=27% Proclus observed by Cook_MC on 1983-1-19

     Proclus 1983 Jan 19 UT 20:36-21:00 Observed by Cook (Frimley, UK, 
     Seeing III, Transparency, Moderate) "Colouration seen". BAA Lunar 
     Section Report. ALPO/BAA weight=2.


2021-Apr-17 UT 23:59-00:08 Ill=28% Aristarchus observed by Cook_JD on 1981-3-11

     A faint white pinpoint flash seen and also in the same position
     a whitish glow around the crater. No futher flashes seen after the
     first one. From UT2117-2130 the glow was still visible but faded
     making it more difficult to locate. When Foley observed he found 
     Aristarchus not very visible in Earthshine, despite Plato, Grimaldi,
     and several other features being visible. Both observers used
     12" reflectors. Cameron's 2006 catalog Extension ID=124 and 
     weight=0. ALPO/BAA weight=3. 


2021-Apr-17 UT 22:06-00:10 Ill=28% Earthshine: sporadic meteors

2021-Apr-18 UT 21:03-21:43 Ill=36% Torricelli_B observed by Braga_R on 2001-4-29

     On 2001 Apr 29 at UT 20:50 R. Braga (Italy) reported that without any 
     filter, the brightness of the east wall of Torricelli B was halfway 
     Torricelli C (faintest) and Moltke (brightest). By insering a Wratten 
     25 red filter though, the crater was slightly more evident. However 
     using a blue Wratten 39A filter, the crater vanished completely, whilst 
     Toricelli C remained. The ALPO/BAA weight=3. 


2021-Apr-18 UT 21:53-22:10 Ill=36% Mare_Crisium observed by Webb_TW on 1832-7-4

     Webb (England, using a fluid achromat) saw brilliant minute spots and 
     streaks in Mare Crisium dotting its surface. This was seen near first 
     quarter. Cameron states that Schroter, Betr?, Madler, Slack and Ingall 
     had all seen it this way at times. Cameron 1978 catalog iD=111 and 
     weight=3. ALPO/BAA weight=2.


2021-Apr-18 UT 22:44-00:41 Ill=37% Aristarchus observed by Butler_FC on 1981-3-12

     On 1981 Mar 12 at UT 19:25-20:30 Butler (of Brixton, UK, using a 
     10" reflector at 32-64x) noticed that Aristarchus was not 
     visible, although the Earthshine was very obvious. Foley (of 
     Kent, UK, and using  12" reflector) noticed that the crater was 
     only just visible but Plato could definitely be seen. Cameron's 
     2006 TLP extension catalog ID=125 and weight=0. ALPO/BAA 
     weight=2.


2021-Apr-19 UT 00:08-00:53 Ill=37% Messier observed by Klein_HJ on 1878-11-1

     Messier 1878 Nov 01 UT 20:00? Observed by Kleis (Cologne, 
     Germany, 6" refractor?) "Mess. A is more yellow after noon, 
     greener near Mess. A noon, both are same color." Please 
     observe this pair of craters in colour and compare noon and 
     non-noon images. NASA catalog weight=4. NASA catalog ID #206.
     ALPO/BAA weight=1.


2021-Apr-19 UT 00:30-01:01 Ill=37% Mont_Blanc observed by Schroter on 1789-9-26

     On 1789 Sep 26 at UT 03:30 Schroter (Lillienthal, Germany) observed 
     close beneath Mons Blanc at the west foot, in the dark, a small 5th 
     magnitude, speck of light. Its round shadow was sometimes black, 
     sometimes grey. Cameron suspects that this is the same as her TLP 
     report No. 50. the Cameron 1978 catalog ID=62 and weight=4. The 
     ALPO/BAA weight=3.


2021-Apr-18 UT 22:10-01:03 Ill=38% Earthshine: (radio) Apr Piscids ZHR=low

2021-Apr-19 UT 21:06-21:37 Ill=46% Alphonsus observed by Lenham_AP on 1952-11-24

     Alphonsus 1952 Nov 24 UT 18:00 A.P. Lenham (Swindon, UK, 3-
     inch efractor x120) noted that the usual dark spots were not 
     visible, but floor ridges and craterlets were surperbly seen. 
     This may not be a TLP but has been given a TLP category as it 
     is a curious appearance and needs to be verified on a repeat 
     repeat illumination apeparance. ALPO/BAA weight=1.


2021-Apr-19 UT 21:06-22:33 Ill=46% Manilius observed by Newport on 1965-12-30

     Dome W. of Manillius 1965 Dec 30 UT 10:35 Observed by Newport (England, 
     4" refractor x180) "White patch or haze, everything else was sharp" 
     NASA catalog weight=3 (average).


2021-Apr-19 UT 21:06-21:31 Ill=46% SE_Limb observed by Rohslberger_R on 1980-4-22

     On 1980 Apr 22 at UT20:30 R.Rohslberger (Hittfield, (near Hamburg) West 
     Germany, 8" reflector, x170 25mm occular used, 300mm focal length?) 
     took some photographs using projection. One of these recorded an 
     apparent "ejecta curtain". Cameron considered lens flare, but the other 
     photographs did not show this. If real then the plume was at a height 
     of ~40km and the ray was ~130km. Cameron concludes that this was an 
     impact photograph. The Cameron 2006 catalog ID=90 and the weight=5. The 
     ALPO/BAA weight=3.


2021-Apr-19 UT 21:06-22:00 Ill=46% Mons_Piton observed by Marshall_KP on 1983-5-20

     On 1983 May 20 at UT00:00-03:00 K. Marshall (Medellin, Columbia) 
     noted that Mons Piton was too bright near the terminator and was 
     surrounded by shadow. A sketch was made. The mountain appeared 
     segmented with one thin shadow line. The mountain looked like a 
     Mexican Sombrero hat. This appearance is normal. What was 
     abnormal was that Piton was brighter than Proclus, and only 
     slightly fainter than Censorinus. The CED brightness 
     measurements were normal Piton=3.6, Proclus=3.5 and Censorinus=
     3.7. Please check to see whether this is still the case. The 
     cameron 2006 catalog ID=221 and the weight=3. The ALPO/BAA 
     weight=1.


2021-Apr-19 UT 21:06-21:52 Ill=46% Torricelli_B observed by Mobberley_M on 1984-4-8 *

     On 1984 Apr 08 UT 19:50 Mobberley (14" reflector, x194, seeing 
     III-IV, Transparency Fair-Poor, Cockfield, UK) found that 
     Torricelli B's shadow was 1/2 the way across the floor, which 
     was normal, but that there was a very dar grey/brown shroud 
     around the carter, out to several radii. 
     The ALPO/BAA weight=1.


2021-Apr-19 UT 21:06-21:27 Ill=46% Ptolemaeus observed by Sheperdson_P on 2020-2-1

     Ptolemaeus 2020 Feb 01 UT 19:40-19:50 P. Sheperdson (York, UK, 
     102mm Mak - BAA) saw an "ashen" sliver of bright light across 
     the floor. Images taken. This maybe normal appearance - though 
     observer re-observed in May and found the effect different in 
     that there was no "ashen" like effect. Visual sketches and 
     time lapse image sequences welcome. If doing visual work - try 
     using a polaroid filter and rotate it to see if that makes any 
     difference. For imaging work, please over-expose slightly to 
     bring out detail on the floor; you could also try colour 
     imaging of the floor as an interesting experiment - though for 
     comparison purposes image other terminator features exhibiting 
     shadow spires. ALPO/BAA weight=1.


2021-Apr-19 UT 21:33-22:05 Ill=46% W_Limb observed by Miles_H on 1987-1-7

     On 1987 Jan 07 at UT19:10-20:30 H.Miles of Cornwall, UK saw two bright 
     patches were seen in Earthshine at clock positions of 4 (this patch was 
     defined by the dark limb and the brightness faded inwards to the disk, 
     over a short distance. "Centred at 60 deg along the limb from the north 
     - a sketch showed approximately 10-15 deg along it") and 5:30 (this 
     second patch was smaller and not so bright as the first patch - it was 
     west of the north pole. P. Foley (Kent, UK) also detcted the patches 
     and said that one was not far from the sunrise terminator. 
     The Cameron 2006 Extension catalog gives this TLP an ID of 291 and a 
     weight of 2. The ALPO/BAA weight=2.


2021-Apr-19 UT 22:26-00:05 Ill=46% Alphonsus observed by Hopp on 1972-9-15

     Alphonsus 1972 Sep 15 UTC 18:48-18:56 Observed by Hopp (13.25E, 52.5N, 
     75mm refractor) "Diffuse white to blue area within the crater - not 
     sure" T=4, S=4. Ref: Hilbrecht & Kuveler Moon & Planets (1984) Vol 30, 
     pp53-61.


2021-Apr-19 UT 23:02-00:54 Ill=47% Werner observed by Lippert_RM on 1953-9-16

     On 1953 Sep 16 UT03:00 R.M. Lippert (San Diego, CA, USA, 20cm 
     Cassegrain reflector, x90)saw a bright magnitude 1 flash on the 
     Moon, that was probably on the east rim of Werner(?) crater. It 
     is unclear if the observer meant it was really magnitude 1, or 
     was what a magnitude 1 star would have looked like. The flash 
     was yellow-orange in colour. Observation described in the 
     "Observations and Comments" column in the December, 1953 
     Strolling Astronomer (Vol. 7, No. 12), on page 170. The ALPO/BAA 
     weight=3.


2021-Apr-19 UT 23:40-01:36 Ill=47% Pickering observed by Collier on 1971-1-4

     Pickering 1971 Jan 04 UTC 20:29-20:37 Observed by Collier (London, 
     England) "Between Saunder and Rhaeticus, apparently coming from Pick. 
     After 2027h it dimished with extraordinary swiftness, like a light goes 
     out. (experienced observer)" NASA catalog weight=?. NASA catalog ID #
     1281. Note that this crater was previously called E.C. Pickering before 
     the IAU renamed some craters.


2021-Apr-19 UT 23:53-01:15 Ill=47% Proclus observed by Darling_D on 1989-12-5

     On 1989 Dec 05 D. Darling of Sun Praire, WI, USA, saw two dark spots on 
     the SE floor of Proclus. The first dark spot was seen through  3" 
     refractor and then also through a 12.5" reflector (35x and 154x). 
     Seeing was S=10 and T=5. He noticed that at 23:00UT the wall spot was 
     less well defined. Darling also comments that he observed reflecting 
     glint, almost as if from a glass surface - he had not seen this effect 
     before. A telephone alert was issued and Caruso verified the spots. 
     Cameron comments that the spots were not shadows because the Sun was at 
     an altitude of 52 deg at Proclus at the time and she states that the 
     steepest slope ever mesured on the Moon was 52 deg and not inside 
     Proclus. Other observers observing were: Weier (6.5" refractor x284 and 
     S=3/10), Caruso (8" reflector x100), and Cameron. The Cameron 2006 
     catalog extesnion ID was 382 and the weight=1. ALPO/BAA weight=3.


2021-Apr-20 UT 00:12-00:42 Ill=47% Messier observed by Klein_HJ on 1878-11-2

     Messier 1878 Nov 02 UT 20:00? Observed by Kleis (Cologne, Germany, 6" 
     refractor?) "Shaped like a half moon with E. edge missing. Appeared 
     diffuse. Messier A was sharp & completely defined. Was sure there was 
     fog there. Next day same appear. Shadow was diffused before noon, Mess. 
     A is more yellow after noon, greener near Mess. A noon, both are same 
     color." NASA catalog weight=4 (very high). NASA catalog ID #206.


2021-Apr-20 UT 00:23-01:43 Ill=47% Earthshine observed by Spellman_R on 2004-11-20

     2004 Nov 20 UT 01:43:36  R. Spellman (120mm F8.3 refractor at 
     prime focus,  PC23C CCTV camera, via a DVD recorder) recorded 
     a flash of light. The ALPO/BAA weight=1.


2021-Apr-20 UT 00:27-01:13 Ill=47% Dawes observed by Thornton_FH on 1948-2-17

     Dawes 1948 Feb 17 UT  19:30 Observed by Thornton (Northwick, England, 
     18" reflector) "Did not see c.p. saw cleft-like streaks from SW crest 
     to E, shadow." NASA catalog weight=3 (average). NASA catalog ID #501.


2021-Apr-20 UT 00:42-01:16 Ill=47% Curtis observed by Williams_AS on 1882-8-21

     Williams of the UK, on 1882 Aug 21 at 19:30UT (Moon's age 7.9 
     days) noticed a spot at least half as bright, and as large as 
     Picard, near to Picard crater. 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.


2021-Apr-20 UT 01:13-01:44 Ill=47% Earthshine observed by Spellman_R on 2004-11-20

     2004 Nov 20 UT 02:34:03 R. Spellman (120mm F8.3 refractor at prime 
     focus,  PC23C CCTV camera, via a DVD recorder) recorded a flash of 
     light. The ALPO/BAA weight=2.


2021-Apr-19 UT 22:13-01:46 Ill=48% Earthshine: (radio) Apr Piscids ZHR=low

2021-Apr-20 UT 02:51-04:28 Ill=48% Archimedes observed by Hill_EG on 1966-3-29 *

     Archimedes 1966 Mar 29 UT 21:00 Observed by Hill (England, 24" 
     reflector, x250, S=E) "Brightening of E-W bands across floor. 
     (Obscuration accord. to Moore)" NASA catalog ID #923. NASA 
     catalog weight=3. ALPO/BAA weight=1.


2021-Apr-20 UT 21:09-21:24 Ill=56% Pallas observed by Stuart_L on 1953-11-15

     Pallas-Schroter 1953 Nov 13 UTC 02:00 Observed by L.Stuart (USA) 
     "Saw and photographed a bright spot on term. between these two 
     craters. Used Kodak 103aF3." NASA catalog weight=5 and catalog 
     ID #559. ALPO/BAA weight=5.


2021-Apr-20 UT 21:09-22:15 Ill=56% Aristarchus observed by Loocks on 1969-11-18

     On 1969 Nov 18 at UT 04:22 Loocks (Valparaiso, Chile, 12" reflector) 
     observed a flash of light of magnitude 12. Cameron speculates a meteor 
     and mentions the apollo 12 watch. The Cameron 1978 catalog ID=1214 and 
     weight=1. The ALPO/BAA weight=1.


2021-Apr-20 UT 21:31-22:09 Ill=56% N_Pole observed by Harris on 1912-1-28

     North (?) (left) Cusp 1912 Jan 28 UT 00:00 (27th 20:00 L.T.) Observed 
     by Harris (Philadelphia? Pennsylvania?, naked eye?): Intensely black 
     curved object 400x240km, shaped like a "crow". Cameron 1978 weight=1 
     (very low) and ID=334. ALPO/BAA weight=1.


2021-Apr-20 UT 21:40-23:13 Ill=56% Eratosthenes observed by Hill_H on 1947-1-30

     Eratosthenes 1947 Jan 30 Mean Col. 16deg. Observed by Hill (UK) "Main 
     peak of massive central mountain group appeared to be in a shadowless 
     having regard to it's claimed height of 6,600 ft. The whole of the 
     floor to the west should have still been in darkness. Instead 
     immediately to the west was a dark (intensity 1.5-2) region extending 
     almost to the foot of the bright inner wall and very diffuse in 
     outline. The observation could not be followed through due to 
     increasing cloud, but on the following night all was normal."


2021-Apr-20 UT 21:44-22:38 Ill=56% Eratosthenes observed by Longshaw_N on 2017-5-4

     Eratosthenes: On 2017 May 04 UT 21:50-22:10 N. Longshaw (BAA, 
     UK, 78mm APO refractor, x125 & x175, seeing II-III, 
     transparency Good). A brownish (orange) tint was seen on the 
     inner NW wall light terraces - this was immediately obvious 
     when first looking at the crater, but as time progressed the 
     effect became less bright. Other craters were checked for 
     similar coloured tints, but none were seen elsewhere on the 
     Moon. UAI observers in Italy (F. Taggogna & A. Tonon) had been 
     imaging the region in colour 17:57-21:47, but their images do 
     not show any colour on the inner NW rim terraces, the their 
     last image is 3 min before Longshaw saw the colour. The 
     ALPO/BAA weight=2.


2021-Apr-20 UT 23:32-23:58 Ill=57% Aristarchus observed by Tempel on 1886-6-10

     On 1886 Jun 10 at UT 21:00 (estimated) Tempel of Germany, saw a star-
     like light (Cameron comments that the reference in the Middlehurst 
     catalog is wrong). Cameron 1978 catalog ID= and weight=4. ALPO/BAA 
     weight=3.


2021-Apr-21 UT 00:40-02:00 Ill=58% Proclus observed by Darling_D on 1989-12-6

     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.


2021-Apr-21 UT 00:53-01:46 Ill=58% Proclus observed by Cook_MC on 1981-5-12

     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.


2021-Apr-21 UT 01:38-02:15 Ill=58% Censorinus observed by Cook_MC on 1981-5-12

     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.


2021-Apr-21 UT 21:12-21:46 Ill=67% Eratosthenes observed by Haas_W on 1936-10-25 *

     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.


2021-Apr-21 UT 21:12-21:14 Ill=67% Alphonsus observed by Argus on 1969-11-19

     Alphonsus 1969 Nov 19 UT 03:30 Observed by Argus/Astronet (CA?, USA) 
     Brightening in W. rim & S. central floor, seen by 2 obs. (Apollo 12 
     watch)" NASA catalog weight 3 (average). NASA catalog ID #1219.


2021-Apr-21 UT 21:12-21:55 Ill=67% Plato observed by Brook_C on 2005-12-10

     Plato 2005 Dec 10 UT 20:46 Observed by Brook (Plymouth, UK, 4" 
     refractor. Conditions excellent with the Moon at a high altitude) "2 
     second duration white flash seen on the floor of the crater" - BAA 
     Lunar Section Report.


2021-Apr-21 UT 22:49-00:44 Ill=67% Messier observed by Kelsey on 1966-12-22

     Messier and A 1966 Dec 22 UT 06:00-06:30 Observed by Kelsey (Riverside, 
     CA, USA, 8" reflector, x200, S=G, T=P) "Blinks on floors of both 
     craters (blink device not stated)" NASA catalog weight=2 (low). NASA 
     catalaog ID #1004.


2021-Apr-21 UT 22:51-00:06 Ill=67% Mons_Piton observed by Moore_P on 1958-9-23

     Piton 1958 Sep 23 UT 00:00? Observed by Moore? (UK?) "Enveloped 
     in an obscuring cloud-like mist" NASA catalog ID 697. NASA 
     catalog weight=2. ALPO/BAA weight=2.


2021-Apr-21 UT 23:22-00:26 Ill=67% Plato observed by Petek on 1980-4-24

     On 1980 Apr 24 at 23:35UT Marco Petek (Porto Alegre, Brazil, 
     using a 7.5" refractor noticed that the center of Plato was 
     bright and opaque and the observer thought it was similar in 
     appearance to Linne. A sketch was made and two other observers 
     confirmed the appearance. Cameron mentions that Petek is an 
     experienced observer. Cameron 2006 catalog extension TLP ID=91 
     and weight=5. ALPO/BAA weight=3.


2021-Apr-21 UT 23:45-01:05 Ill=67% Cichus observed by Ryder_JW on 1975-9-15

     Cichus 1975 Sep 15 UT 11:15-11:30 G.Ryder (Corinda, Australia, 
     25cm reflector, x250 & x380, seeing good but with some cloud)
     The interior W. wall of this crater (on the lip) appeared 
     hazy - difficulkt to bring detail into focus. Neighbouring 
     craters/detail were sharp. Details in the crater wall interior 
     were starting to become visible as time went on, but it had 
     clouded over by 11:30. A Moon Blink was used but no colour was 
     detected. ALPO/BAA weight=1.


2021-Apr-22 UT 00:07-01:01 Ill=68% Torricelli_B observed by Moseley_R on 1985-3-1

     On 1985 mar 01 at 20:00UT? Moseley noticed a violet band (tapering to 
     an apex close to the crater centre and merged with the eastern 
     exterior) around Toricelli B, however M. Cook (Frimley, UK) had seen a 
     dusky band(England, UK) on an earlier photo. There was no terminator 
     shadow in the crater. Cameron 2006 Catalog Extension TLP ID=260 aqnd 
     weight=3. ALPO/BAA weight=3.


2021-Apr-22 UT 00:12-01:06 Ill=68% Censorinus observed by Druzdov on 1927-4-11

     Censorinus-Maskelyne 1927 Apr 11/12 UTC 23:00-01:00? Observed by 
     Druzdov (Russia) "2 luminescent pts. observed. Not vis. at same sun 
     angle on May 7 & 12th. Not vis. on photos of Barn in 5/23/63" NASA 
     catalog weight=3 (average). NASA catalog ID #393.


2021-Apr-22 UT 00:16-04:04 Ill=68% Mare_Imbrium observed by Caruso_J on 1979-8-3 *

     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.


2021-Apr-22 UT 01:02-02:36 Ill=68% Carlini_D observed by Collins_M on 2004-1-2

     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.


2021-Apr-22 UT 21:15-23:42 Ill=77% Bullialdus observed by Cook_AC on 1979-8-3 *

     Bulialdus 1979 Aug 03 UT 21:36-21:48 Observed by Cook (Frimley, UK, 
     seeing III, Moonblink device) "Bullialdus eastern side of the crater 
     looked brighter in red i.e. rim and exterior, extending to the south 
     slightly and this reddish areas was slightly hazy. At 21:41 it clouded 
     over but at 21:47-21:48 it cleared briefly and effect was noted again. 
     Also Darney appeared very visible through the red filter. Probably 
     spurious colour as the Moon was -18 deg in declination and the whole 
     Moon had a slight brownish tinge" ALPO/BAA weight=1.


2021-Apr-22 UT 21:15-23:53 Ill=77% Darney observed by Cook_AC on 1979-8-3 *

     Darney observed by Cook (Frimley, UK, seeing III, Moonblink device) 
     See TLP report for Bullialdus (eastern side) concerning reddish
     areas. At 21:41 it clouded over but at 21:47-21:48 it 
     cleared briefly and the effect was noted on Bulialdus again.
     Also Darney appeared very visible through the red filter. 
     Probably both effects were spurious colour related as the Moon 
     was -18 deg in declination and the whole Moon had a slight 
     brownish tinge. An ALPO/BAA weight of 1 is assigned to this TLP."


2021-Apr-22 UT 22:08-22:58 Ill=77% Alphonsus observed by Argus on 1969-11-20

     Alphonsus 1969 Nov 20 05:27 (UT)? Observed by Argus/Astronet (San 
     Diego, Sacramento, CA, USA) "Brightening in crater. (San Diego & 
     Sacramento obs. confirmed, but astronauts did not see anything. Apollo 
     12 watch)." NASA catalog weight=3 (average). NASA catalog ID #1222.


2021-Apr-22 UT 22:46-02:15 Ill=77% Censorinus observed by Marshall on 1985-3-2 *

     On 1985 Mar 02 at 20:00UT? Marshall (Medeline, Colombia, South America)
     measured some very low Crater Extinction Device brightness readings of 
     Censorinus compared to Proclus. The Cameron 2006 catalog extension ID=
     261 and the weight=3. ALPO/BAA weight=2.


2021-Apr-22 UT 22:57-00:48 Ill=77% Mare_Imbrium observed by Unknown_Observer on 1820-10-17

     In 1820 Oct 17 at UT 20:00 an unkown observer reported in Mare Imbrium, 
     south of Sinus Iridum (30W, 40N) some brilliant spots. The Cameron 1978 
     catalog ID=80 and weight=1. The ALPO/BAA weight=1.


2021-Apr-22 UT 22:59-00:53 Ill=77% Plato observed by Kelsey on 1966-12-23

     Plato 1966 Dec 23 UT 06:15-07:10 Observed by Kelsey (Riverside, CA, 
     USA, 6" reflector, S=P, T=G) and Coralitos Observatory (Organ Pass, NM, 
     USA, 24" reflector +Moonblink) "3 brilliant spots on floor, all showed 
     blinks, (permanent colored Ground features ?). Not confirmed by 
     Corralitos MB." NASA catalog weight=2 (low). NASA catalog ID #1005.


2021-Apr-22 UT 23:50-01:45 Ill=77% Gassendi observed by Sims_DM on 1977-5-28

     Gassendi 1977 May 28/29 UT 20:45-21:15 Observed by D. Sims 
     (Dawlish, Devon, UK) saw a hazy area on the south east floor 
     that was normal in red and white light but darker in blue. 
     This was partly confirmed by J-H Robinson (Devon, England, 10" 
     reflector) 21:24-23:12 who saw the south east floor of 
     Gassendi to have a loss of detail - but no colour seen, 
     although at 21:57-21:58 it was slightly brighter in red than 
     in blue briefly. P. Doherty (22:45-23:15) did not see anything 
     ususual. D. Jewitt (22:22-22:55) did not reveal anything 
     ususual, apart from spurious colour. The Cameron 1978 catalog 
     ID=3 and ID=1463. The ALPO/BAA weight=3.


2021-Apr-22 UT 23:51-01:10 Ill=77% Gassendi observed by Darling_D on 1990-9-30

     On 1990 Sep 30 at D. Darling (Sun Praire, WI, USA, 12.5" 
     reflector, x150) observed a red spot on the west wall (bright 
     in red filter and faint in the blue filter. No filter 
     reactions were found elsewhere. Gassendi had much detail 
     visible. A sketch was made. BAA observers in the UK were 
     alerted but they could not observe due to cloud. Cameron 
     2006 extension catalog ID=411 and weight=5. ALPO/BAA weight=3.


2021-Apr-23 UT 01:28-02:46 Ill=78% Aristarchus observed by Klein_HJ on 1881-8-6

     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.


2021-Apr-23 UT 02:46-00:00 Ill=78% Plato observed by Mobberley_M on 1982-6-2

     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.


2021-Apr-23 UT 21:18-22:39 Ill=85% Gassendi observed by Unknown_Observer on 1889-5-11 *

     On 1889 May 11 at 22:00? UT an unknown observer saw an ink black spot 
     on the rampart of Gassendi. It had not been seen before ar at the next 
     lunation or indeed ever again. Cameron 1978 catalog ID=261 and 
     weight=3. ALPO/BAA weight=2.


2021-Apr-23 UT 21:18-21:27 Ill=85% Aristarchus observed by Foley_PW on 1975-10-16

     Aristarchus 1975 Oct 16 UT 20:00? Observed by Foley (Kent, 
     England, 12" reflector) "Deep blue-viol. spot in NW (IAU?) 
     interior corner." NASA catalog weight=3. NASA catalog ID #
     1413. ALPO/BAA weight=1.


2021-Apr-23 UT 21:18-22:10 Ill=85% Gassendi observed by Darling_D on 1990-10-1

     On 1990 Oct 1st at 00:44-01:24UT D Darling (Sun Praire, WI, USA) 
     observed that Gassendi still had a blink effect when viewed through 
     blue (Wratten 38A) and red (Wratten 25A) filters. No effect was seen on 
     Aristarchus. Gassendi was brighter in the red filter and this was 
     confirmed by Weier. Sketches were made and brightness measurements 
     taken. Both observers used a 12.5" reflector x159. At 01:00UT the NW 
     wall was 7.5, the SW wall 8.0, the S. wall 7.5, the floor 6.0, the 
     outer E. wall 8.0, the N. floor 5.5. Gassendi A W. wall was 9.5,l 
     Aristarchus W. floor was 8.0, NW wall 8.0, shadowed floor 0.0, E. outer 
     wall 7.0, NBP 5.5, area between Aristarchus and Herodotus 6.0, and the 
     comet like tail: 8.2 on the E. and 8.5 on the W. The Cameron 2006 
     catalog extension TLP ID=412 and weight=5. The ALPO/BAA weight=4.


2021-Apr-23 UT 21:30-23:00 Ill=86% Aristarchus observed by Neville on 1971-9-1

     Aristarchus 1971 Sep 01 UT 20:45-21:05 Observed by Neville, 
     Cunnington (Nottingham, UK, 4" refractor x180, altitude, low) 
     "Saw a bright glow, especially in E. wall (Confirm. but not 
     indep.?)" NASA catalog weight=3. NASA catalog ID #1310. 
     ALPO/BAA weight=1.


2021-Apr-23 UT 21:58-23:38 Ill=86% Aristarchus observed by Prout on 1976-9-5

     Aristarchus 1976 Sep 05/06 UT 18:45-01:35 Observed by Prout 
     (England?, 12" reflector, S=III-II), Foley (England, 12" 
     reflector), Moore and Spry (Sussex, England, 12" reflector) 
     "Viol. hue on crater on W. wall, especially NW corner seen by 
     Prout & 2 Foleys. Moore & Spry did not see color. All obs. noted 
     that the crater was dull 


2021-Apr-23 UT 22:07-23:58 Ill=86% Proclus observed by Bartlett on 1970-10-12

     Proclus 1970 Oct 12 UT 00:54 Observed by Bartlett (Baltimore, MD, USA, 
     4" reflector, 51x-181x) "Floor darkened to intensity 1.5 deg (albedo) & 
     c.p. became invis. Next day c.p. reappared & was 5 deg bright & 6deg 
     bright on 15th" NASA catalog weight=4 (high). NASA catalog ID #1277.


2021-Apr-23 UT 22:25-22:34 Ill=86% Vallis_Schroteri observed by Firsoff on 1955-8-29

     Schroter's Valley 1955 Aug 29 UT 19:45 Observed by Firsoff (Somerset, 
     England, 6.5" reflector x200, S=P-F) "Valley almost completely 
     invisible in blue" NASA catalog weight=4 (high). NASA catalog ID #605.


2021-Apr-23 UT 22:52-00:10 Ill=86% Herodotus observed by Bartlett on 1957-9-6

     Observed by Bartlett (Baltimore, MD, USA, 5" reflector x180, S=1-5, 
     T=5) Pseudo peak visible within floor shadow at 03:10h" NASA catalog 
     weight=4 (high). NASA catalog ID #671. ALPO/BAA weight=3.


2021-Apr-23 UT 23:06-00:26 Ill=86% Deslandres observed by Penzel_E on 1965-5-12

     On 1965 May 12 at UT 19:10 E. Penzel (Rodewisch, East Germany) was 
     taking a sequence of images during the impact of the Soviet Lunik 5. He 
     detected a tens of km scale elongated cloud after the impact over a 
     duration of 9.5 minutes. However there are differences between the 
     images elsewhere on the Moon, possibly due to different exposures or 
     some other effects and it is not 100% sure that what he detected was 
     impact debris/cloud?. The ALPO/BAA weight=3.


2021-Apr-23 UT 23:39-00:45 Ill=86% Schickard observed by Watkins_E on 1972-9-19

     Schickard 1972 Sep 19 UT 19:45-20:25, 20:00-23:30 Observed by Watkins 
     (Herts., Eng. 4.5" reflector, x225, S=G) Amery (Reading, Eng.m 12" 
     reflector?), Fitton (Lancashire, Emg., 8.5" reflector) and Moore 
     (Selsey, Eng., 12.5" reflector?, 4.5" refractor 45-225x, S=P) 
     "Luminous, nebulous spot attracted Watkin's att'n. Got brighter. 
     Checked 'scope--not instru. Obj. had greenish-gray color, size @ 15km. 
     Amery & Fitton with blink devices noted nothing unusual at later times 
     (2000-2330h). Aris., Plato, Gass. were neg. at 1930-2025h (date not 
     given, guessed at fr. available info.). Turbulence, lasting 
     secs. at a time." NASA catalog weight=2. NASA catalog ID #
     1344. ALPO/BAA weight=2.


2021-Apr-23 UT 23:39-00:03 Ill=86% Herodotus observed by Haas_W on 2002-2-24

     On 2002 Feb 24 UT 05:15-05:35 W. Haas (Las Cruces, NM, USA) observed an 
     obscuration in Herodotus - the shadown was, almost, but not 
     completely black. ALPO/BAA weight=2.


2021-Apr-23 UT 23:51-03:44 Ill=86% Mare_Vaporum observed by Taylor_W on 1955-10-28 *

     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.


2021-Apr-24 UT 00:24-02:21 Ill=86% Mons_Pico observed by Rawstron on 1933-10-1

     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.


2021-Apr-24 UT 00:30-00:52 Ill=86% Herodotus observed by Haas_W on 2002-2-24

     On 2002 Feb 24 UT 06:05-06:20 W. Haas (Las Cruces, NM, USA) observed 
     that the shadow was, almost, but not completely black. This might have 
     been related to the observing conditions.
     ALPO/BAA weight=2.


2021-Apr-24 UT 00:45-02:37 Ill=86% Aristarchus observed by Kozyrev on 1955-10-28

     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.


2021-Apr-24 UT 00:49-02:44 Ill=86% Herodotus observed by Haas_W on 1954-8-11

     Observed by Haas (Las Cruces, NM, USA) "Temporary greyness seen in 
     interior shadow." ALPO/BAA weight=3.


2021-Apr-24 UT 01:34-02:45 Ill=87% Aristarchus observed by Klein_HJ on 1881-8-7

     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.


2021-Apr-24 UT 01:49-02:45 Ill=87% Aristarchus observed by Moore_P on 1981-3-17

     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.


2021-Apr-24 UT 02:16-02:45 Ill=87% Bailly observed by Miles_H on 1965-5-12

     On 1965 May 12 at UT 22:20 H. Miles (UK) found a possible 
     obscuration in Bailly crater. Most of the region was as sharp as 
     normal, but the central area was greyish and blurred. Although 
     the observer concerned considered themselves a non-experienced 
     observer, another BAA Lunar Section observer saw the same 
     effect. ALPO/BAA weight=2.


2021-Apr-24 UT 21:21-22:28 Ill=93% Aristarchus observed by Firsoff on 1954-8-11

     1954 Aug 11 observed by Firsoff (Somerset, UK, 6.5" reflector, 
     x200) "Brilliant in red filter, variable)" NASA catalog 
     weight=4. NASA catalog ID #570. ALPO/BAA weight=3.


2021-Apr-24 UT 21:21-22:20 Ill=93% Aristarchus observed by Azeau on 1971-9-2

     Aristarchus-Herodotus 1971 Sep 02 UTC 20:00 Observed by Ayeau 
     (Paris, France, 12" reflector, x100) "Brownish-red or maroon 
     seen on Aris. W.wall ridge to Herod. on S.wall of Herodotus" 
     NASA catalog weight=2. NASA catalog ID #1311. 
     ALPO/BAA weight=2.


2021-Apr-24 UT 21:21-21:41 Ill=93% Mersenius observed by McConnell_J on 1975-6-21

     Mersenius 1975 Jun 21 UT 21:50-22:45 Observed by McConnell 
     (Northern Ireland, 6" reflector) Moore? (Sussex, Enland, 15" 
     reflector, 5" refractor, S=F), Reading (Rushden, England, ? 
     14" reflector) and Foley (Kent, England, 12" reflector, S=P) 
     "McConnell saw an obscur. starting at 2150h which disappeared 
     at 2245h. Moore(?) alreted, saw no anomaly in 15 in refl. & 
     5-in refr. under fair conditions from 2209-2228h. Reading 
     reported neg. fr. 2250-2345h (after phenom.). Foley reported 
     color in it but also a crater to S. of it & Aris., prob. due 
     to seeing conditions." NASA catalog weight=5. NASA catalog 
     ID#1408. ALPO/BAA weight=3.


2021-Apr-24 UT 21:46-23:24 Ill=93% Ross_D observed by Harris on 1965-4-14

     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.


2021-Apr-24 UT 21:54-22:22 Ill=93% Babbage observed by Lord_CJR on 1974-9-29

     Babbage 1974 Sep 29 UT 00:00-01:00 Observed by Lord (St Annes-
     on-Sea, UK, 10" refractor, Wratten 25 and 44a filters, 125x, 
     S=II-III). Activity observed in SW floor between A & W. wall. 
     Details not obscured in either filter, but slightly more 
     darker than surroundings in the blue filter. NASA catalog 
     weight=2. NASA catalog ID #1395. ALPO/BAA weight=2.


2021-Apr-24 UT 22:34-22:58 Ill=93% Archimedes observed by North_G on 1988-9-23

     On 1988 Sep 23 at 19:40-19:55 & 20:36-20:41 G. North (760mm 
     Coude Rrefractor, x250, Royal Grenwwich Observatory, 
     Herstmonceux, UK, seeing V, Transparency: Fair). 19:40-19:55 
     image very unsteady. All seems normal in other crtaters with 
     the exception of Arcimedes. Much of the rim seems indistinct 
     apart from a 1/4 length of the west rim. Strongly suspected 
     that this was due to a combination of seeing and illumination. 
     UT 20:02-20:06 - checked the area with a lower magnification 
     10" Astrographic Refractor - the crater seems more normal, so 
     suggesting that the theory was correct. 20:36-20:41 returned 
     to the 30" reflector, and the crater appeared similar to the 
     start of the session. This is almost certainly not a TLP, but 
     it would be helpful to have some images or sketches to check 
     this theory out. Weight=1.


2021-Apr-24 UT 22:48-23:42 Ill=93% Plato observed by Darling_D on 1990-10-2

     On 1990 Oct 02 at 02:25-02:45UT D. Darling (Sun Praire, WI, USA using a 
     12.5" reflector at x159, with red and blue filters), saw a blink 
     effect on the west wall of Plato i.e. brighter through a blue filter 
     than through the red. No Colour blinks seen on Gassendi or Aristarchus. 
     Cameron 2006 Catalog TLP=413 and weight=4.


2021-Apr-24 UT 23:08-00:58 Ill=93% Gassendi observed by Robinson_JH on 1977-5-30

     On 1977 May 30 at 21:04-02:13UT J.H.-Robinson noted a loss of 
     detail inside Gassendi, however he did not regard this as a 
     TLP. The effect was also seen by P.W. Foley. Cameron 2006 
     extension catalog TLP ID=16 and weight=0 ALPO/BAA weight=1.


2021-Apr-24 UT 23:15-00:25 Ill=93% Aristarchus observed by De_Groof on 1987-3-13

     On 1987 Mar 13 at UT02:00-03:00 De Groof (Belgium, 8" reflector x150, 
     seeing=clear) noted that the north west part of Aristarchus had a blood 
     red shimmering filling the whole crater. A video by Mobberley some 18 
     hours later, shows variation in Aristarchus. Cameron 2006 catalog ID=
     301 and weight=5. ALPO/BAA weight=3.


2021-Apr-25 UT 01:06-02:28 Ill=94% Vallis_Schroteri observed by Darling_D on 1991-8-23

     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.


2021-Apr-25 UT 01:14-02:28 Ill=94% Aristarchus observed by Amery_GW on 1978-4-20

     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.


2021-Apr-25 UT 01:14-02:28 Ill=94% Promontorium_Laplace observed by Foley_PW on 1978-4-20

     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.


2021-Apr-25 UT 05:02-05:04 Ill=94% Aristarchus observed by Louderback_D on 1979-8-6 *

     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.


2021-Apr-25 UT 23:23-00:46 Ill=98% Schickard observed by Moore_P on 1940-5-20

     Schickard 1940 May 20 UT 20:00 Observed by Moore (England, 12?" 
     eflector) "Fog on floor -- milky appearance, less pronounced 
     than on 8/2/39 (see #456)." NASA catalog ID #465. NASA catalog 
     weight=4. ALPO/BAA weight=2.


2021-Apr-25 UT 23:23-23:24 Ill=98% Lichtenberg observed by Baum_R on 1951-1-21

     Lichtenberg 1951 Jan 21 18:19.2-18:38.5 UT observed by Baum (Chester, 
     England). Tiny red spot noticed initially and then faded. Location of 
     spot 31.403N 66.167W. 20cm refractor x90-x100. Seeing fair-extremely 
     good. NASA catalog assigns a weight of 3. NASA TLP ID No. #
     542. ALPO/BAA weight=2.


2021-Apr-25 UT 23:23-00:52 Ill=98% Plato observed by Taylor_A on 1971-1-10

     Plato 1971 Jan 10 UTC 20:17-20:42 Observed by Taylor (Slough, England, 
     8.5" reflector) "Blink (dark gray to black), 13x3km diam. on E. wall & 
     floor in indentation in wall. Smaller by 2028 h. gone at 2035h. 
     Reappeared at 2028h & gone completely at 2042h)." NASA catalog weight=3 
     (average). NASA catalog ID #1282.


2021-Apr-25 UT 23:23-00:35 Ill=98% Riccioli observed by Madej_P on 1979-8-6 *

     On 1979 Aug 06 at 22:24-22:54 P.Madej (Hudersfield, UK, 6" 
     reflector. Purple Wratten 35, and Yellow Wratten 15 filters 
     used) Orange glow seen (at x73) on west side of crater, near the 
     central peak. The central peak was coloured too at x110. At 
     22:32 (x75) the central peak was brighter than the rest of the 
     area wrough the yellow filter. At 22:34UT at x73 everything 
     looked OK through the purple filter. The TLP was still visible 
     at 22:54. ALPO/BAA weight=1.


2021-Apr-25 UT 23:51-03:39 Ill=98% Helicon observed by Caruso_J on 1979-8-7 *

     The area west of Helicon not visible despite the area being 
     fairly bright at Full Moon time. This area was a very bright 
     patch one night. Cameron notes: comensurability of Full Moon & 
     Perigee. Cameron 2006 catalog extension ID=64 and weight=3. 
     Seeing=7 and transparency=4. 2.4" refractor used. ALPO/BAA 
     weight=1.


2021-Apr-26 UT 00:23-01:20 Ill=98% Mare_Humboldtianum observed by Baum_R on 1951-1-21

     Mare Humboldtianum 1951 Jan 21 20:47-22:00 UT observed by Baum 
     (Chester, England).  The appearance of some mountains on the 
     limb appeared to change over time, with some mistiness. ALPO/BAA 
     weight=2.


2021-Apr-26 UT 00:35-01:20 Ill=98% Madler observed by Haas_W on 1940-8-17

     Madler 1940 Aug 17 UTC 06:45 (Cameron gives 07:30 but Haas says 
     this is wrong) Observed by Haas (New Mexico?, USA, 12" 
     reflector?) "Bright spot on S. rim had I=5.9 on this date but 
     6.8 on Sep. 16, when observ. cond. were similar (see #473)" NASA 
     catalog weight=4. NASA catalog ID #470. ALPO/BAA weight=3.