TLP Repeat Illumination/Libration and Earthshine predictions for: Greenland - Nuuk

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

2020-May-01 UT 00:00-00:30 Ill=52% Hyginus_N observed by Crain on 1877-11-13

     Hyginus Nova 1877 Nov 13 UT 20:00? Observed by Crain, Klein, Eng. 
     officer (France?, Cologne (Germany), Enland?, 6" refractor?, S=E) 
     "Standing out with such prominence, seen at a glance. No trace of it on 
     14th, in excell seeing. (indep. confirm.?)"NASA catalog weight=5 (very 
     high). NASA catalog ID #198. ALPO/BAA weight=3.

2020-May-01 UT 00:00-00:24 Ill=52% Theaetetus observed by Moore_P on 1952-12-24

     Thaetetus 1952 Dec 24 UT 20:00? Observed by Moore (England?) 
     "Bright spot, hazy line of light" NASA catalog weight=4. NASA 
     catalog ID 556. ALPO/BAA weigh=2.

2020-May-01 UT 00:00-01:07 Ill=52% Menelaus observed by Azevado on 1969-11-17

     Menelaus 1969 Nov 17 UT 16:00-19:00 Observed by Rubens de 
     Azevedo,A. Monghilhot, E. Leal e Jose Fernandes (Joao Pessoa, 
     Paraiba, Brazil, 8" and 10" reflectors) "Entire crater of 
     Men. illum. by pale greenish light. (Azevedo)" NASA catalog 
     weight=5 NASA catalog ID #1211a. ALPO/BAA weight=4.

2020-May-01 UT 00:00-00:07 Ill=52% Alphonsus observed by Jasmin_G on 2003-4-10

     On 2003 Apr 10 at 00:40UT a GLR observer G. Jasmin (Quebec, Canada, 
     using a 10" F-10 Schmidt Cassegrain) took a photograph of Alphonsus 
     crater on Kodak 400ASA film with an exposure of 1/30th sec. There was a 
     light visible (diameter 10 km) inside Alphonsus and the effect was 
     present for 5 minutes. The observer commented that they have seen a 
     light in this crater many times before, but never as long as 5 minutes.
     This report was submitted to the GLR group in Italy. The ALPO/BAA 

2020-May-01 UT 00:00-01:07 Ill=52% Chacornac observed by Khachatryan_S on 2009-8-28

     On 2009 Aug 28 at UTC 17:00:15-17:00:42 S. Khachatryan (Yerevan, 
     Armenia, 127mm Maksutov-Cassegrain, x171, seeing 9 (1=worst and 10-
     best), Transparency 5-6 on a scale of 1 to 6) observed in the Chacornac 
     area a series of fiery sparks (dot like with tiny rays), slightly 
     elongated with the multitudinal rays orientated towards the south west 
     direction. The colour was mostly red, with some yellow. The final flash 
     was the most clear. The TLP was tiny in area, but "was distinctly 
     bright against any other object on the Moon". The positional 
     uncertainty of the location of the spark effect was approximately +/-
     150 km, based upon an examination of an atlas afterwards. Just prior to 
     the spark effect, something dark, small and fuzzy (only just discrnable 
     to the eye, through the eyepiece) was seen to pass from the west across 
     the Moon in a slight curve, round the surface of the Moon to the east 
     (post observation estimate: seen for 3.5 sec and covered roughly 8% of 
     the lunar diameter in that time). The area of the dark object was 
     comparable in size to (or slightly less than?) craters such as 
     Autolycus F (diameter 3km) or le Monnier E (diameter 4km) i.e. on the 
     limits of vision of the scope used. The location of the flash was not 
     exactly at the same location as the dark object passed across, but gave 
     the impression of starting from it? A back of the envelope calculation 
     of the lunar diameter covered in the time quoted gives an approximate 
     speed (at the lunar distance) of 80km/s or on the very high end of 
     typical meteor streams that pass by. At closer distances, and 
     recalculated velocities, it is unlikely to be a satellite in low Earth 
     orbit (20m/sec at 100km distance), but could perhaps be a bird or 
     insect at a few km range? So was this dark object something in our
     atmosphere by chance passing across the field of view close to the time 
     of the TLP flare or was at the lunar distance and related to the TLP? 
     Incidentally, no attempt was made during this observation to move the 
     scope to check that the TLP remained stationary against the Moon. The 
     ALPO/BAA weight=2.

2020-May-01 UT 00:03-01:48 Ill=52% Unknown observed by Fauchier on 1886-5-11

     Fauchier of Marseilles, France, seeing=good - fair and the Moon at a 
     high altitude, saw two lights on the Moon brighter than any others 
     during similar circumstances. They had colour. These had not been seen 
     before and he ruled out cromatic aberation. Cameron 1978 catalog ID=249 
     and weight=3. ALPO/BAA weight=2.

2020-May-01 UT 00:05-00:34 Ill=52% Plato observed by Lade on 1889-6-6

     On 1889 Jun 06 at 22:00 UT Lade of France (8" refractor) saw two 
     extremely bright spots (Plato B & D). Cameron 1978 catalog ID=262 and 
     weight=2. ALPO/BAA weight=1.

2020-May-01 UT 01:43-03:33 Ill=52% Birt observed by Gray_R on 2004-12-20

     2004 Dec 20 UT 02:51-03:26 R. Gray (Winumma, USA) noted that 
     the crater had exceptional brightness to nimbus surrounding it. ALPO/BAA 

2020-May-01 UT 02:43-03:33 Ill=53% Proclus observed by Haiduk on 1972-8-17

     Proclus 1972 Aug 17 UT 20:05-21:10 Observed by Haiduk (13.25E, 52.5N, 
     60mm refractor, S=1, T=3) "Well visible bright area at the NE wall, end 
     of event uncertain for seeing became poor" Hilbrecht & Kuveler Moon & 
     Planets (1984) Vol 30, pp53-61.

2020-May-01 UT 02:51-03:33 Ill=53% Proclus observed by Hopp on 1972-10-15

     Proclus 1972 Oct 15 UT 20:48 Observed by Hopp (13.25E, 52.5N, 
     75mm refractor) "Bright flash at the NW wall but poor seeing." 
     T=3, S=5. Ref: Hilbrecht & Kuveler Moon & Planets (1984) Vol 
     30, pp53-61. ALPO/BAA weight=1.

2020-May-01 UT 03:20-03:33 Ill=53% Proclus observed by Spellman_R on 1995-7-6

     On 1995 Jul 06 at UT 03:22-03:57 R. Spellman (Los Angeles, USA
     found that the floor of Proclus appeared to darken slightly 
     through a blue filter. The ALPO/BAA weight=2. Source of this 
     observation came from Spellman's web site.

2020-May-01 UT 23:44-00:23 Ill=63% Hyginus_N observed by Crain on 1877-11-14

     Hyginus Nova 1867 Nov 14 UT 20:00? Observed by Crain, Klein, Eng. 
     officer (France?, Cologne (Germany), Enland?, 6" refractor?, S=E) "On 
     13th it was standing out with such prominence, seen at a glance. No 
     trace of it on 14th, in excell seeing. (indep. confirm.?)"NASA catalog 
     weight=5 (very high). NASA catalog ID #198.

2020-May-01 UT 23:44-00:35 Ill=63% Tycho observed by Haas_W on 1940-7-14

     Tycho 1940 Jul 14 UT 02:00? Observed by Haas (NM? USA, 12"? 
     reflector) "Luminous marks in shadow, ragged edged & irreg. 
     shape. E. wall had a milky luminosity" NASA catalog weight=4. 
     NASA catalog ID #468. ALPO/BAA weight=2.

2020-May-01 UT 23:44-00:51 Ill=63% Plato observed by Reese_EJ on 1949-3-9

     Plato 1949 Mar 09 UT 02:00-03:00 E.J.Reese (6" reflector x240) 
     and one hour later T.R.Hake (5" refractor x300) both unable to 
     see any detail on the floor of Plato, despite both being able to 
     see a "difficult to see" cleft near to the crater Connon. Reese 
     was able to see detail under similar illumination back in 1948 
     and 1947 and saw the floor craterlets in Plato clearly then. 
     ALPO/BAA weight=1. 

2020-May-01 UT 23:44-00:41 Ill=63% Ross_D observed by Harris on 1964-2-22

     On 1964 Feb 22 at UT 05:00 Harris (Whittier, CA, 19" reflector, x100) 
     observed the appearance of a ring to the south east of Ross D. Cameron 
     says that 7 persons have seen this over a 2.5 year period. The Cameron 
     1978 catalog ID=801 and weight=1. The ALPO/BAA weight=1.

2020-May-01 UT 23:44-00:59 Ill=63% Gassendi observed by Moore_P on 1967-2-18

     Gassendi 1967 Feb 18 UT 20:30-20:40 Observed by Moore, Moseley 
     (Armagh, Northern Ireland, 10" refractor, x300) "Red color in 
     crater (in dark)". NASA catalog weight=4. NASA catalog ID #1015. 
     ALPO/BAA weight=4.

2020-May-01 UT 23:44-00:51 Ill=63% Messier observed by Robinson_JH on 1979-7-3 *

     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.

2020-May-01 UT 23:44-23:50 Ill=63% Tycho observed by Albert_J on 2010-8-19

     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.

2020-May-02 UT 00:06-01:31 Ill=63% Aristarchus observed by Robinson_JH on 1980-5-23

     On 1980 May 23 at UT21:14-21:55 J.H. Robinson (Teighmouth, Devon, UK, 
     12" reflector, seeing II-III) could see Aristarchus in blue and clear 
     filters, but not in red light. Robinson saw some variability in this 
     effect with time. Cameron 2006 catalog ID=96 and weight=3. ALPO/BAA 

2020-May-02 UT 00:06-01:31 Ill=63% Copernicus observed by Blair_G on 1980-5-23

     On 1980 May 23 at UT21:14-22:18 G. Blair (Bridge of Weir, 
     Scotland, UK, 216mm reflector, seeing II-IV) found a red tinge 
     along the western wall of Coperncius, perhaps 32km in length. 
     This was invisible in a blue-green Wratten 44a filter, but was 
     unmistakble in a red Wratten 25 filter. Could have been 
     spurious colour - but no other regiosn were affected. The 
     ALPO/BAA weight=2. 

2020-May-02 UT 00:06-01:31 Ill=63% Littrow observed by Petek on 1980-5-23

     On 1980 May 23 at UT 21:14-21:18 Marco Petek (Porto Alegre, 
     Brazil) saw in the region of Littrow and an area of dark mare 
     south west from Littrow to Argaeus, abnormal darkness, and a 
     rapid change of form. He also saw a shadow extending south 
     east from Campanus opposite to the Sun - however Foley thinks 
     this is normal. Cameron 2006 catalog ID=96 and weight=0 or 1. 
     ALPO/BAA weight=1.

2020-May-02 UT 00:20-02:07 Ill=63% Copernicus observed by Firsoff on 1955-7-28

     Copernicus 1955 Jul 28 UT 20:20 Observed by Firsoff (Somerset, England, 
     6.5" reflector x200) "Great brilliance of the terraces in E(IAU?) wall 
     system(?) gets specular refl. (he gave 0820UT, but must have meant 
     2020" NASA catalog weight=4 (high). NASA catalog No. #600.

2020-May-02 UT 00:58-02:52 Ill=63% Atlas observed by Andre on 1966-12-21

     Atlas 1966 Dec 21 UT 17:10 Observed by Andre (Belgium, 3" refractor) 
     "Bright spot on SE part of floor, not seen in photo on 12/18/66" NASA 
     catalog weight=2 (low). NASA catalog ID #1003.

2020-May-02 UT 01:02-02:34 Ill=63% Aristarchus observed by Spencer_S on 1976-6-6

     Aristarchus 1976 Jun 06 UT 21:30-21:40 S.Spencer and R. Hunt 
     (60mm refractor, x150 and x60) both observed red on the SW 
     corner of Aristarchus. ALPO/BAA weight=1.

2020-May-02 UT 01:05-02:59 Ill=63% Copernicus observed by Horner_E on 2012-9-24

     2012 Sep 24 UT 22:00-23:00 Copernicus. E. Horner (Salisbury, 
     UK, 15cm reflector) observed a prominent red arc where the 
     sunlit part of the interior wall met the shadow. Sometimes the 
     arc was 1/4 the way around the interior, and sometimes half of 
     the way around. Telescope moved, but the red arc stayed where 
     it was. Eyepieces change, but the effect remained. Other parts 
     of the Moon checked, but no red seen. There were however 
     splashes of green e.g. Longomontanus on the terminator, 
     elsewhere further inland from the termionator, and little 
     splashes of green on Mare Frigoras - but lasting a brief time. 
     The red colour was as strong as a red LED and the green similar 
     to that of the northern lights. The observer's husband was asked 
     to independetly check Copernicus and remarked that he could see 
     a little bit of green at the top and some red near the bottom, 
     along the line of the internal shadow. Although there were 
     checks for red elsewhere on the Moon and none were seen, the 
     Moon was starting to get low and it is typical of spurious 
     colour in a few respects. Therefore the ALPO/BAA weight=1 for 

2020-May-02 UT 01:10-02:35 Ill=63% Tycho observed by Blair_G on 1980-5-23

     On 1980 May 25 at UT 22:18 G. Blair (Bridge of Weir, Scotland, 216mm 
     reflector, seeing II-IV) suspected a short sharp flash, white in colour 
     north of Tycho's north wall. Nothing more seen. ALPO/BAA weight=1. 

2020-May-02 UT 01:22-02:47 Ill=63% Aristarchus observed by Foley_PW on 1980-5-23

     On 1980 May 23 at UT22:30 (P.W. Foley (Kent, UK, 10" reflector, seeing 
     II) described Aristarchus as a "blue luminous patch", but it was too 
     faint to obtain a CED brightness measurement. Cameron 2006 catalog ID=
     96 and weight=3. ALPO/BAA weight=2.

2020-May-02 UT 01:30-02:36 Ill=63% Copernicus observed by Darling_D on 1990-8-30

     On 1990 Aug 30 at UT02:11-02:36 D. Darling (Sun Praire, WI, USA, 3" 
     refractor, x90, seeing conditions: "at,. boiling") noted a coloured 
     area on the west wall of Copernicus that was unusual in appearance - 
     however other craters along the terminator had a similar effect. There 
     was also a "dazzling bright spot on the E. rim and he witnessed 6 
     flashes from the lighted part of Copernicus over a very short time 
     interval. Cameron comments that the colour may well have been dur to 
     chromatic aberation because a refractor was used. The Cameron 2006 
     catalog ID=408 and the weight=0. The ALPO/BAA weight=1.

2020-May-02 UT 01:30-02:36 Ill=63% Proclus observed by Darling_D on 1990-8-30

     On 1990 Aug 30 at UT 02:11-02:36 D. Darling (Sun Praire, WI, USA, 3" 
     reflector, x90, atmosphereic conditions: boiling) found "N rim of Proc. 
     bright interior uniform gray". The Cameron 2006 catalog report is 
     slight unclear as the description for thnis 1990 Aug 30 TLP also 
     includes Copernicus and Censorinus in the list of TLP craters. So one 
     description which might refere to Copernicus, could possibly have been 
     meant for Proclus, namely: "Dazling bright spot on E rim. Rotated 
     eyepiece but no change. N rim of Proc.......". The Cameron 2006 catalog 
     ID=408 and weight=0. The ALPO/BAA weight=1.

2020-May-02 UT 01:54-03:48 Ill=64% Mons_La_Hire observed by Geisel_M on 1972-11-15

     Mons la Hire 1972 Nov 15 UT 09:45-10:18 M.Geisel (Brisbane, 
     Australia, 12.5" f/8 reflector, x90) discovered the TLP, P. 
     Anderson (9.5" reflector) independently confirmed that the TLP
     had an effect in his Moon Blink device - but the effect 
     (suspected that the blink was caused by the extreme nrightness 
     of the mountain?) was weak and thought it not worth further 
     investigation. Photographs taken by Anderson. Geisel believes 
     the effect to be real and states that the area remained sharp 
     and clear throughout. ALPO/BAA weight=2.

2020-May-02 UT 03:18-03:54 Ill=64% Proclus observed by Classen on 1969-11-18

     Proclus 1969 Nov 18 UT 20:00? Observed by Classen (Pulnitz, 
     Czechoslovakia, 8" refractor) "Brightened, exceeded normal. Brightness 
     is monitored relative to Censorinus. (started July, 1969) Obs. thinks 
     all bright craters are variable. (Apollo 12 watch)." NASA catalog 
     weight=2 (low). NASA catalog ID #1216.

2020-May-02 UT 03:41-06:16 Ill=64% Vitello observed by Unknown_Observer on 1960-8-1 *

     On 1960 Aug? 01 at UT 22:00? an unknown observer detected that Vitello 
     was illuminated -it should have been in shadow? Cameron says that if 
     several days before sunrise then the date could have been July through 
     to December, with August 1st most likely, and ancilary data is 
     therefore given for this date. The Cameron 1978 catalog ID=729 and 
     weight=1. The ALPO/BAA weight=1.

2020-May-02 UT 23:47-00:34 Ill=74% Sinus_Iridum observed by Unknown_Observer on 1872-3-19

     In 1872 Mar 19 at UT 23:17 an unknown observer observed in Sinus 
     Iridum: "Covered with a light gray shadow thru which he saw dimly the 
     surface below - indicating obscuring matter over it. (Cameron says: 
     only w. 1/3 of bay would be in shadow as boundaries are 25-37W)". The 
     Cameron 1978 catalog ID=178 and the weight=3.

2020-May-02 UT 23:47-01:38 Ill=74% Alphonsus observed by Jenning on 1966-4-1

     Alphonsus 1966 Apr 01 UT(?) 03:00-03:20 Observed by Jenning, 
     Harris (Coral Estates, CA, USA, 12" reflector) "Red patch from 
     c.p. to W. wall (no confirm. from Corralitos obs. moon blink 
     device & obs. at that time)" NASA catalog weight=3. NASA 
     catalog ID #924. ALPO/BAA weight=2.

2020-May-02 UT 23:47-00:54 Ill=74% Alphonsus observed by Moore_P on 1967-2-19

     Alphonsus 1967 Feb 19 UT 20:30-21:11 Observed by Moore, 
     Moseley (Armagh, Northern Ireland, 10" refractor, x360) "Blink 
     area between 1900 & 1940 with neg. results. Suddenly at 2030 
     there was a bright red glow, brightest Moseley had ever seen, 
     at Feb 17 suspectec place. Moore returned at 2037h in time to 
     see fading effect. Brief return at 2105-2111; neg. from 
     2120-2250h then clouds. Nothing on Feb 20. confirmation)." 
     NASA catalog weight=5. NASA catalog ID #1016. 
     ALPO/BAA weight=4.

2020-May-02 UT 23:47-00:23 Ill=74% Bullialdus observed by Foley_PW on 1975-9-15

     Colour seen, mostly blueness on south rim and exterior of south
     rim at Bullialdus crater. Blueness seen too on Plato on inner SSW
     rim, but no colour reported on any other craters. Seeing III,
     12" reflector used x200 and x360.

2020-May-02 UT 23:47-00:23 Ill=74% Plato observed by Foley_PW on 1975-9-15

     Colour seen, mostly blueness on inner SSW rim. Blueness also seen
     on south rim and exterior of south rim at Bullialdus crater. No colour
     reported on any other craters. Seeing III, 12" reflector used x200 and 

2020-May-02 UT 23:47-01:06 Ill=74% Mare_Crisium observed by Arsyukhin on 1981-6-12

     Arsyukhin and others (Moscow, USSR), with naked eye and binouculars 
     saw three dark spots suddenly appear on Mare Crisium and disappear 
     approximately 30 minutes later. Cameron 2006 catalog extension ID=145
     and catalog weight=4. ALPO/BAA weight=2.

2020-May-02 UT 23:47-01:06 Ill=74% Plato observed by Arsyukhin on 1981-6-12

     Arsyukhin and others (Moscow, USSR), with naked eye and binouculars 
     saw TLP activity in Plato that Cameron thinks confirms what UK
     observers saw later. Cameron 2006 catalog extension ID=145
     and catalog weight=4. ALPO/BAA weight=1.

2020-May-02 UT 23:47-00:45 Ill=74% Plato observed by Davies_H on 1988-10-20

     H. Davies (Llamandel, Swansea, UK, using a 3" refractor,
     detected a short duration reddish hue along the inner NE-NW? 
     rim (4-7 O'Clock location. Sketch supplied to Foley (BAA 
     coordinator). No similar effect seen elsewhere. A.C. Cook 
     (Frimley, UK) detected spurious colour on several craters, 
     including Plato that night. Cameron 2006 Catalog Extension ID=
     337 and weight=0. ALPO/BAA weight=1.

2020-May-03 UT 00:07-02:02 Ill=74% Agrippa observed by Capron on 1878-12-4

     Agrippa and vicinity 1878 Dec 04 UT 20:00? Observed by Capron (France?) 
     "Odd, misty look as if vapor were in or about them" NASA catalog 
     weight=3 (average). NASA catalog ID #209.

2020-May-03 UT 00:14-03:21 Ill=74% Plato observed by North_G on 1980-7-22 *

     On 1980 Jul 22 at UT20:08-21:50 G.North (Sussex, UK, 8" reflector, x144 
     and x207, seeing III-V and transparency fair) suspected an obscuration 
     on the north and north west wall. The effect came and went. May have 
     been due to seeing and image contrast? Cameron 2006 catalog ID=101 and 
     weight=1. ALPO/BAA weight=1.

2020-May-03 UT 02:13-04:04 Ill=74% Copernicus observed by Johnstone_GH on 1954-11-6

     Observed by G.H. Johnstone of Albuquerque, NM, USA on 1954 Nov 05 UT 
     20:00 (according to Cameron), but 02:00-04:00 according to the
     original observation and at colongitudes 34.7 to 35.7 deg. 4" 
     reflector, x150 used. The obsewrver reported that the western part 
     (about 1/3rd of the interior) was pitch black with shadow. However 
     there was a zone about as wide, or perhaps only a fourth of the total 
     width that was distinctly a lighter bluish shade, almost like twilight. 
     The shadows of the peaks on the western edge of the rim were clearly 
     seen crossing this bluish shadowed area. Then this area ended sharply, 
     and the farside was bathed in light from the rising sun. The shadows of
     the peak were sharply defined across the twilight zone, and the edge of 
     the pitch black shadow was easily defined but not as sharp as the
     darker shadows crossing the the blue twilight zone. The observer 
     checked other craters but did not see this condition in any of them - 
     they all had the abrupt division between black and white that we would
     normally expect to see. Cameron 1978 catalog ID=579 and weight=2.
     Reference 1962 edition of ALPO's Journal: The Stolling Astronomer.
     ALPO/BAA weight=3.

2020-May-03 UT 02:37-04:04 Ill=75% Censorinus observed by Brandli on 1969-11-19

     Censorinus 1969 Nov 19 UT 1922 Observed by Brandli (Wald, 
     Switzerland, 6" reflector, x90) "Brightening -- photo, (the 
     author, WBC, cannot verify from photo. It is brighter, but so 
     are Proc. & Dionys. -- it being between. i.e. Proc. > Censor. > 
     Dionys. Apollo 12 watch)." NASA catalog weight=5 (very high). 
     NASA catalog ID #1220. ALPO/BAA weight=1.

2020-May-03 UT 02:42-04:04 Ill=75% Plato observed by Fitton on 1970-12-8

     Plato 1970 Dec 08 UT 18:00-23:59 UT Observed by Fitton (Oldham, 
     England, 8.5" refkector, S=VG) "All surrounding detailperfect, 
     but barely a trace of floor detail. A suggestion of 2 or 3 white 
     spots including central A seen only on one examination out of 
     five. "sector" beginning to show. ALPO/BAA weight=1.

2020-May-03 UT 03:06-04:04 Ill=75% Plato observed by Moore_P on 1981-6-12

     P. Moore at 21:10 found the southern wall (and ontothe southern floor)
     of the crater to be indistinct. Elsewhere in the crater everything was
     sharp. The effect was still seen at 21:42UT, but less strong. A check
     was made for colour with aq Moonblink device, but none was seen. There
     was still a trace of this effect at 21:44UT, although detail was now
     becoming visible. By 21:48UT vertical streaks were seen crossing
     the floor from the obscuration area and these were more visible in the 
     red filter and not in the blue. Cameron comments that undefined patches
     on the floor of Plato are not normal. By 21:55UT some craterlets on the
     floor started to become visible and the TLP for Moore ended by UT22:23.
     P.Foley was alerted by Moore and saw a "amssive dense obsecuration
     on the south wall, south floor and south outer glacis to the Mare".
     Foley noted that by 21:50UT the effect was fading and finished by 
     22:03UT. Foley reported an orange translucent haze covering half of the 
     floor, but floor craterlets could be seen on and off - however his 
     atmospheric seeing conditions were IV. At 22:00 UT Foley reported the 
     floor close to the north wall to be "milky or misty". No detail was 
     visible at 21:15UT and variability in the floor continued until 
     23:10UT. Hedly-Robinson was aleted at 21:35UT and found no difference 
     between red and blue views of the area, however he did find that the 
     south rim was indistinct although this effect had lessened by 22:00 UT 
     and was normal by 22:17UT. M. Mobberly saw a white spot on the floor at 
     21:20 UT, whereas he normally would have expected to see craterlets. 
     Mobberly was alerted at 21:40 UT and took some colour photos. He also 
     made sketches that showed variability in the floor and dark lines and 
     patches in the north west corner. However the altitude of the Moon was 
     low. Cameron mentions that two of the photos show loss of detail at the 
     south wall and beyond.and also a change in the floor markings.The north 
     wall at 21:50UT was strangely reddish (didn't think this was spurious 
     colour). The rest of the wall was sharp at 22:20UT through a yellow 
     filter. Large bright patch in the centre and rest of the floor was 
     apparently of the same shading as Mare Imbrium. The above notes are 
     based upon the Cameron 2006 catalog extension TLP ID 145 and weight=4.
     ALPO/BAA weight=3.

2020-May-03 UT 03:17-04:04 Ill=75% Plato observed by Birt_WR on 1870-5-10

     Plato 1870 May 10 UTC 22:00 Observed by Birt (England) "Extraordinary 
     display of lights. Says not effect of sunlight" NASA catalog weight=4 
     (high). NASA catalog ID #167.

2020-May-03 UT 23:50-00:49 Ill=83% Plato observed by Watkins_E on 1971-9-30

     Plato 1971 Oct 30 UT 19:35-20:55 E.Watkins (Braintree, UK, 4.5" 
     reflector, x45,x150, x225), thought he saw a faint patch at 
     19:35 and it still was visible at 19:40. At 19:50-19:55 he saw 
     what may have been the remainder. At 20:55 he noticed a shadow 
     in the area. ALPO/BAA weight=1.

2020-May-03 UT 23:50-01:06 Ill=83% Tycho observed by Taylor_DB on 1971-11-28 *

     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.

2020-May-04 UT 00:19-01:51 Ill=84% Gassendi observed by Duckworth on 1969-11-20

     Gassendi 1969 Nov 20 UT 17:06-17:15 Observed by Duckworth 
     (Manchester, England, 8" refractor x250) Faint Pinkish 
     Obscuration on floor. Event in progress at 1706 - left telescope 
     at 1715 to report it, but TLP gone upon return. Gassendi was 
     normal from from 1734-1822h. NASA catalog weight=4. NASA catalog 
     ID #1223. ALPO/BAA weight=3.

2020-May-04 UT 00:31-01:49 Ill=84% Plato observed by North_G on 1980-5-25

     Plato 1980 May 25 UT 21:33-22:54 Observed by North (Seaford, 
     UK, seeing III-IV, 460mm Newtonian) Definite strong reddish 
     glow along NNW border, definitely much stronger than spurious 
     colouration and always visible when telescope moved in RA and 
     Dec to eliminate possible chromatic aberation effects in the 
     eyepiece. Effect ended by 21:54 UT. BAA Lunar Section Report. 
     ALPO/BAA weight=2.

2020-May-04 UT 01:36-03:06 Ill=84% Hyginus_N observed by Wilkins_HP on 1944-4-4

     Hyginus N 1944 Apr 04 UT 20:00? Observed by Wilkins (Kent, England, 
     15" reflector) "Darker than usual. S. edge of great crater valley was 
     bordered by a narrow dark band for 13km along its length" NASA catalog 
     weight=4 (high). NASA catalog ID #490.

2020-May-04 UT 01:43-03:33 Ill=84% Swift observed by Wilkins_HP on 1927-5-12

     Peice A (Swift=IAU name?) 1927 May 12 UT 22:03 Observed by Wilkins 
     (England, 15" reflector) "Complete obscuration of crater. Saw no trace 
     of it. It was vis. May 11 & faint on May 13. 3x in 1948 Moore saw whole 
     area misty gray & devoid of detail, whereas surroundings were sharp & 
     clear. Birt also found it invis. at times in late 1800's" NASA catalog 
     weight=4. NASA catalog ID #394. ALPO/BAA weight=3.

2020-May-04 UT 02:19-03:42 Ill=84% Aristarchus observed by Weier_D on 1990-1-8

     On 1990 Jan 08 at UT00:55 D. Weier (Sun Praire, WI, USA, 12.5" 
     reflector, x159) observed an "anomalous black bar across Aris. Nearly 
     digonal to terminator." The nearby crater Prinz had curious shadow 
     patterns, perhaps related to the rising sun projecting shadows from the 
     eastern rim and "reflected down"? "At 0224 W wall had a break in it & a 
     diffuse glow where it should not be. Manske thinks it was Earthshine 
     effect. At 0305 Weier saw Manske's bar - with diffused light and 
     flicker like an aurora - like a gas with electric charge. At 0325 saw a 
     strange glow in Aris. but may be due to atm. though thought it to be a 
     LTP. Darling had never seen such effects before (flickering implies a 
     medium in it)." The Cameron 2006 catalog ID=387 and the weight=3. The 
     ALPO/BAA weight=3.

2020-May-04 UT 02:22-02:43 Ill=84% Plato observed by Fauth on 1906-3-6

     Plato 1906 Mar 06 UT 22:00? Observed by Fauth (Germany? 6" refractor) 
     "Color (brightness?) greatly enhanced as it was to be on the next 
     nite" NASA catalog weight=3 (average). NASA catalog ID #324.

2020-May-04 UT 02:43-04:02 Ill=84% Gassendi observed by Becker on 1969-11-20

     Gassendi 1969 Nov 20 UT 19:30-19:45 Observed by Becker (Holland, 4" 
     refractor) "Curious small shadow from NW (ast. ?) wall. (Apollo 12 
     watch)" NASA catalog weight=1 (very low). NASA catalog ID #1224.

2020-May-04 UT 02:56-04:02 Ill=84% Aristarchus observed by Price_M on 1981-6-13

     Aristarchus visible just past terminator. West wall was
     brighter than normal. Bright flash seen in/on NW wall -
     apparently in the same place as Pedler's May 17th sketch.
     Cameron 2006 extension catalog ID=146 and weight=4.
     Observed by M. Price of Camberley, Surrey, UK with
     a 6" reflector and a Moon Blink device. Seeing=III.

2020-May-04 UT 02:56-04:02 Ill=84% Plato observed by Price_M on 1981-6-13

     Plato 1981 Jun 13 UT 20:48-21:08 Observed by Price (Camberley, England, 
     152mm reflector, seeing III) Possible Moon blink (red) seen
     on north wall. Also the craterlets on the floor could be seen
     despite the observing conditions not being optimal. BAA Lunar Section 
     observation. Cameron 2006 extension catalog ID=146 and weight=4.
     ALPO/BAA weight=3.

2020-May-04 UT 02:57-04:02 Ill=84% Aristarchus observed by Armitage_J on 2006-2-9

     Observer noted a bright spot on the interior west wall that seemed
     brighter than what they would have expected. unfortunately the precise
     time of this observation was not recorded so the moon-rise and 
     midnight UT values are used to place a limit on the time of 
     observation. Images by Shaw taken at UT 1754, 18:45 and 23:13
     do not exhibit the effect.

2020-May-04 UT 02:58-04:02 Ill=84% Aristarchus observed by Becker on 1969-11-20

     Aristarchus 1969 Nov 20 UT 19:45-20:05 Observed by Becker (Holland, 4" 
     refractor) "Sharp whiteness on inner W. (ast. ?) side (Apollo 12 
     watch)" NASA catalog weight=1 (very low). NASA catalog ID #1224.

2020-May-04 UT 03:18-04:02 Ill=84% Plato observed by Birt_WR on 1870-5-11

     Plato 1870 May 11 UTC 22:00 Observed by Birt (England) "Extraordinary 
     display of lights. Says not effect of sunlight" NASA catalog weight=4 
     (high). NASA catalog ID #167.

2020-May-04 UT 03:18-04:02 Ill=84% Aristarchus observed by Moore_P on 1984-1-14

     On 1984 Jan 14 at UT 20:00 P. Moore (Selsey, UK) observed that 
     Aristarchus was brighter than it normally is at sunrise. No 
     quantitative measurements were made though. The Cameron 2006 catalog 
     ID=238 and weight=3. The ALPO/BAA weight=1.

2020-May-04 UT 03:27-04:02 Ill=85% Ross_D observed by Cross on 1965-3-14

     SE of Ross D 1965 Mar 14 UT 07:40 Observed by Cross (Whittier, CA, USA, 
     12" reflector) "Crater wall partially obscured; bright" NASA catalog 
     weight=3 (average). NASA catalog ID #872.

2020-May-04 UT 05:15-06:28 Ill=85% Plato observed by Moore_P on 1998-7-5 *

     Plato 1998 Jul 05 P. Moore (Selsey, UK, 15" reflector, x200-
     x400, seeing II/III) comments that he is puzzled why the floor 
     of Plato, which is light gray in shade, looks completely blank 
     tonight. The ALPO/BAA weight=1.

2020-May-04 UT 23:53-00:04 Ill=91% Herodotus observed by Bartlett on 1949-11-3

     In 1949 Nov 03 UT 01:06 J.Bartlett (3.5" refractor, x100) noted that 
     the floor of Herodotus was very dark, the east wall was very bright, 
     and the floor contained a central bright peak. The BAA/ALPO weight=3.

2020-May-04 UT 23:53-01:19 Ill=91% Kepler observed by Lugo on 1954-11-7

     Kepler 1954 Nov 07 UTC 23:20 Observed by Lugo (Caracus, Venezula) 
     "Luminous pts. (MBMW say "bright pt.; just outside E.wall).
     NASA catalog weight=3 (average). NASA catalog ID #580.

2020-May-04 UT 23:53-00:16 Ill=91% Daniell observed by Crick on 1979-7-6

     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.

2020-May-04 UT 23:53-00:40 Ill=91% Plato observed by Cook_MC on 1987-2-10

     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.

2020-May-04 UT 23:57-01:03 Ill=91% Aristarchus observed by Gabriel on 1972-10-19

     Aristarchus 1972 Oct 19 UT 17:55-18:05 Observed by Gabriel (Wettern, 
     Belg. 4" refractor, x166, S=E), Hitchens (Stamine Locks, Eng., 8.5" 
     reflector, S=F), Peters (Kent, Eng., 10" relector), Amery (Reading, 
     Emg. 10?" reflector), Flynn (england, 12" reflector) "At 17:55h noted 
     bluish-purple color area just N. of Aris. & it reached just over N. 
     wall, lasted 2 min. At 1800h color noted again, but not as brilliant & 
     gone at 1801h. Seen again at 1804h & now was on E. (ast. ?) wall,
     lasting M 1min. Sure of its reality but not of lunar origin. All gone 
     at 1805h. Hitchens noted a very bright spot on W. (IAU?) wall between 2 
     prominent bands. Blue darkening in W#38 filter, neg. in W#8,25,58 & 
     integrated light. Other areas gave similar but lesser effects. May be 
     due to damp geletin. (Moore thinks not LTP but many obs. have rep't 
     blue in Aris.) Others obs. later (2100, 2215-2300, 2305h) & noted 
     nothing unusual." NASA catalog weight=2 (low). NASA catalog ID #1346.

2020-May-05 UT 00:08-01:52 Ill=91% Herodotus observed by Beaumont_S on 1993-9-28

     On 1993 Sep 28 at UT 04:30-06:10 S.Beaumont (Cambridge, UK)observed 
     that the north east edge of Herodotus appeared as a "highland area 
     spilling over into" the Cobra's Head border or "overlook". The shadow 
     on the elevation was contiguous with a similar shadow over the Cobra's 
     Head "like a darkening of the terrain. Shadow appears softer diffused 
     without sharp bounds of most Lunar shadows. sketch. S. edge of crater 
     started to appear at 0615". The Cameron 1978 catalog ID=468 and the 
     weight=2. The ALPO/BAA weight=1 as the date or UT are wrong.

2020-May-05 UT 02:02-02:56 Ill=92% Plato observed by Fauth on 1906-3-7

     Plato 1906 Mar 07 UT 22:00? Observed by Fauth (Germany? 6" refractor) 
     "Color (brightness?) greatly enhanced as on the previous nite" NASA 
     catalog weight=3 (average). NASA catalog ID #324.

2020-May-05 UT 02:12-03:18 Ill=92% Plato observed by Taylor on 1972-10-19

     Plato 1972 Oct 19 UT 20:10 Observed by Taylor, Phillips, Ford, Kennedy 
     (Dundee, Scot. 10" refractor) "Taylor noted a slight blink on NW wall. 
     Ford said it was neg. Phillips was not sure. Taylor returned to 
     telescope & no blink. Kennedy reported neg." NASA catalog weight=1 
     (very low). NASA catalog ID #1347.

2020-May-05 UT 02:19-04:18 Ill=92% Plato observed by Birt_WR on 1870-5-12 *

     Plato 1870 May 12 UTC 22:00 Observed by Birt (England) 
     "Extraordinary display of lights. Says not effect of sunlight" 
     However an article by Nigel Logshaw in the Feb 2014 LSC suggests 
     that it was probably just normal fine scale spots and streaks on 
     the floor of the crater. NASA catalog weight=4. ALPO/BAA weight=
     1. NASA catalog ID #167.

2020-May-05 UT 02:34-03:40 Ill=92% Aristarchus observed by Foley_PW on 1981-4-16

     Foley, Kent, UK noted that the floor was slate blue-grey
     with no colour seen elsewhere. 12" reflector used, seeing=II.
     Cameron 2006 extension catalog ID 131 and weight=1. ALPO/BAA

2020-May-05 UT 03:11-03:40 Ill=92% Aristarchus observed by Foley_PW on 1984-1-15

     Foley (Kent, UK) saw the west wall dull and stongly coloured. Moore 
     (Sussex, UK) saw the wall as normal. However Cameron points out that 
     Foley (Kent, UK) is a lot more Blue/UV sensitive than Moore. Mosely 
     (Covington, UK) at 22:10 UT noticed a brightening on the East wall and 
     at 01:10-01:25 UT suspected that the interior had a weak yellow-green 
     cast to it. Cook (Frimley, UK) states that orange colour was within the
     interior crater, but green beyond the east rim at the 9 O'Clock and
     the south east corner to floor blue/mauvre beyond the northern rim 
     NW/WSW. Foley sstates that orange and blue/mauvre might be spurious 
     colour, but green one cannot get this way. Cameon suggests chromatic 
     aberatons as a possibility but thinks that the observers concerned were 
     experienced enough to recognize this if it were the cause. Cameron 2006 
     catalog extension ID=239 and weight=0. Moore used a 15?" refletor and 
     Foley used a 12" refletor. Mosely experienced II seeing and good 
     transparency. Cook had III seeing and also good transparency. P. 
     Grego made an observation this night too. The 
     ALPO/BAA weight=2.

2020-May-05 UT 03:28-03:40 Ill=92% Plato observed by Cook_AC on 1986-12-13

     Plato 1986 Dec 13 UT 20:30 Observed by A. Cook (Frimley, UK, 
     seeing III) North East quadrant of Plato the crater was blurred 
     and ill-defined. Also no craterlets visible anywhere on the 
     floor of Plato until the central craterlet was just glimpsed 
     later at 23:00-23:45, though seeing now III-IV (cirrus at times 
     in the sky). At this later time the NE rim was less blurred than 
     before. ALPO/BAA weight=1.

2020-May-08 UT 03:10-05:12 Ill=99% Aristarchus observed by Porter on 1978-8-19 *

     On 1978 Aug 19 at UT02:45-04:00 Porter (Naragansetts, RI, USA, using a 
     6" reflector, Seing = 6/10) noticed blue on the north east corner of 
     Aristarchus and an orange glow on the south east wall. They detected no 
     movement or change in brightness. The observer used both eyes, to make 
     sure it was not an eye defect, and three filters: red Wratten 25, blue 
     Wratten 82 and Violet Wratten 47. Porter found that the colours faded 
     for a duration of 5 minutes and then returned. Their right eye gave a 
     good view and using their left eye they suspected that it was 0.5 steps 
     brighter than the remainder of the crater. The suspected colour 
     remained visible, even under moments of good seeing conditions. The 
     colour eventually faded over time and was eventually gone. Porter 
     reportd seein gcolour here on the following night. Apparently other 
     bright spots showed no colour. Fitton suggests that the filters used 
     confirm that the south east wass was definitely red in colour. The 
     Cameron 2006 catalog ID=37 and the weight=0. ALPO/BAA weight=1.

2020-May-28 UT 01:03-03:21 Ill=27% S_Pole observed by Wilkins_HP on 1948-4-14 *

     Leibnitz Mountains 1948 Apr 14 UT 20:00? Observed by Wilkins 
     (Kent, England, 12.5" reflector) " S.cusp prolonged -- detached 
     peaks -- starlike pts. connected by fine filaments brighter than 
     earthshine. (Barcroft, Haas, Vaughan, Moore & Firsoff also have 
     seen similar phenom.)(just sunlight catching high peaks?)." NASA 
     catalog weight=2. NASA catalog ID #502. ALPO/BAA weight=1.

2020-May-28 UT 01:03-01:38 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.

2020-May-29 UT 01:06-01:29 Ill=38% 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.

2020-May-29 UT 01:06-02:03 Ill=38% Plato observed by Thornton_FH on 1948-4-15

     Plato 1948 Apr 15 UT 20:00? Observed by Thorton (Northwitch, England, 
     9" reflector) "Brilliant orange-yellow flash 1 km inside E. rim  
     (similar to earlier #500 LTP flash in the dark)" NASA catalog weight=3 
     (average). NASA catalog ID #504.

2020-May-29 UT 01:06-02:03 Ill=38% Aristarchus observed by Madej_P on 1985-4-26

     Aristarchus appeared to glow in Earthshine with a faint 
     green luminescence that moved from side to side. A bright
     blue central spot was also seen. The green colour was detected
     in two seperate eyepieces.  Observation made from England.
     Cameron 2006 catalog extension ID=266 and weight=2. 
     ALPO/BAA weight=2.

2020-May-29 UT 01:46-02:03 Ill=38% 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 

2020-May-29 UT 02:44-04:26 Ill=38% W_Limb observed by Vince_AW on 1948-4-15 *

     In 1948 Apr 15 at UT 20:00? Vince (England, UK) observed a bright spot, 
     about magnitude 3, in Earthshine, about 30deg north of Grimaldi., on 
     the west limb (90W, 25N). The Cameron 1978 catalog ID=503 and the 
     weight=3. The ALPO/BAA weight=3.

2020-May-30 UT 01:08-02:16 Ill=49% Ptolemaeus observed by Ingalls on 1866-4-22

     Ptolemaeus 1866 Apr 22 UTC 20:00? Observed by Ingalls (Champion Hills, 
     England, UK) "Crater on term., unusually smooth surf. seemed much 
     diversified & gave impression, as at many other times that there was an 
     obscuring medium". NASA catalog weight=3 (average). NADA catalog ID = 142. ALPO/BAA weight=3.

2020-May-30 UT 01:08-02:16 Ill=49% Eudoxus observed by Trouvelot on 1877-2-20

     "Eudoxus" 1877 Feb 20 UTC 21:30-22:30 Observed by Trouvelot (Meudon, 
     France, 13" refractor?) "Fine line of light like a luminous cable, 
     drawn W. to E. across crater". NASA catalog weight=1 (very low). NASA 
     catalog ID #185. ALPO/BAA weight=1.

2020-May-31 UT 01:11-01:54 Ill=60% Tycho observed by Barker_R on 1931-3-27

     On 1931 Mar 27 R.Barker (observing from Cheshunt, UK, 12.5" reflector) 
     found that the central mountain in the brilliant ray crater Tycho was a 
     curious shade of grey. This was despite the interior of Tycho being 
     fully in shadow. Cameron 1978 catalog ID=400 and weight=3. ALPO/BAA 

2020-May-31 UT 01:11-02:03 Ill=60% Tycho observed by Spellman_R on 2003-5-10

     Tycho 2003 May 10 UTC 03:15 Observer Robert Spellman (Los Angeles, USA) 
     - "CCD video of spur-like features coming off N & S edges of central 
     peak - spurs pointed eastwards". It is now thought that this effect is 
     almost certainly seeing flare as it is visible on other features in the 
     image, although to a much lesser extent. The ALPO/BAA weight=1.