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


2025-Aug-10 UT 01:35-01:36 Ill=99% Mare_Tranquillitatis observed by Culver on 1988-4-3 *

     On 1988 Apr 03 at UT02:25-02:30 Culver (Harker Heights, X, USA, Meade 
     2045 reflector, x40, seeing=turbulent) detected flashes coming from 
     just north of the centre of Mare Tranquilitatis. Some of these flashes 
     were of a duration of seconds whilst others were several minutes. 
     Altogether ~20 flashes were seen, and not in the same place. "5 small 
     star-like points could be located - and there were lots of craterlets". 
     The spots were "lined up E-W at N of 10 deg latitude." Colour was not 
     visible on these nor variations. Apparently the observer had seen this 
     type of TLP before but had not reported them. The Cameron 2006 catalog 
     ID=323 and weight=2. the ALPO/BAA weight=2.


2025-Aug-12 UT 03:43-04:42 Ill=90% Posidonius observed by Schmidt_J on 1849-2-11

     Posidonius 1849 Feb 11 UT 02:00? Observed by Schmidt (Athens, Greece, 
     7" refractor) "Bright little crater in it was shadowless. Schroter saw 
     repeated changes in it & others & once saw this crater's shadow 
     replaced by a gray veil. Gruithuisen saw the same thing as Schroter in 
     1821." NASA catalog weight=4 (high). NASA catalog ID #128. ALPO/BAA 
     weight=3.


2025-Aug-12 UT 07:07-07:18 Ill=90% Aristarchus observed by Weier_D on 1992-5-20

     On 1992 May 20 at UT 11:15 D. Weier (Sun Prairie, WI, USA, 
     naked eye and 7x50 binouculars, sky conditions excellent) 
     noted that Aristarchus and, an area, were very bright to the 
     eye. In binoculars the feature was quite sharp and distinct, 
     "> anything else on the Moon". When observing please try using 
     your eyes alone and then a small aperture and low 
     magnification. The Cameron 2006 catalog ID=447 
     and the weight=2. The ALPO/BAA weight=1.


2025-Aug-12 UT 07:12-07:18 Ill=90% Proclus observed by Gray_R on 2001-11-4

     Proclus 2001 Nov 04 UTC 07:00-07:43 "Robin Gray of Winneucca, Nevada, 
     U.S.A. reported a contrast effect and brightening in the crater 
     Proclus. Using a 15.2 cm refractor he conducted a Moon blink search 
     with Wratten 25a and 38a blue filters. His report goes as follows: 
     Moon Blink carried out. In Red 25 Proclus looked nearly the 
     same as in white light. Through the Blue 38a filter, however, only the 
     brilliant lit south east wall was clearly visible. The northeast wall 
     was very dim with this filter. With no filters the NE and SE wall were 
     brilliantly lit, the SE wall was almost as bright as Aristarchus. A 
     thread like strip along the NW wall, possibly the rim of the crater, 
     was also brilliantly illuminated. The interior of the crater was a 
     featureless stygian black with the exception of a brilliant (intensity 
     9) thread of light that ran parallel  to the illuminated east wall. 
     Whether this was an L.T.P. or an optical  effect of atmospheric 
     turbulence is unknown, did not see anything similar elsewhere along the 
     terminator though" ALPO/BAA weight=3.


2025-Aug-13 UT 06:40-07:21 Ill=82% Unknown observed by Unknown_Observer on 1958-11-1

     On 1958 Nov 01 at UT 00:00 a TLP was seen on the Moon (location and 
     observer not given). The Reference for this is Palm, 1967. The Cameron 
     1978 catalog ID=702 and weight=0. The ALPO/BAA weight=1.


2025-Aug-14 UT 02:54-03:39 Ill=73% Aristarchus observed by Anderson on 1967-5-29

     Aristarchus-Herodotus 1967 May 29 UT 06:40-07:25 Observed by Anderson 
     (Manchester, N.Hampshire, 10" reflector, x212, S=G, T=E) "After timing 
     sunset on Theophilus & Cyrillus turned to Aris.-Herod. At 0640 saw red-
     brown color centered at ?=.685, eta=+.390. Glow strongest at largest 
     area at 0640. Decreased in area but not in intensity to 1/2 its size at 
     0648. At 0650 color gone. Seen again at 0658 but not so pronounced. 
     Faded out at 0700, obs. terminated at 0725. (Haas thinks it might have 
     been atm. dispersion at such low alt. of 12-17 deg)." NASA catalog 
     weight=1. NASA catalog ID #1038. ALPO/BAA weight=1.


2025-Aug-14 UT 03:48-05:44 Ill=73% Bullialdus observed by Chapman_BW on 1981-12-16

     On 1981 Dec 16 at UT 17:45 B.W. Chapman, Kingston-Upon-Thames, 
     UK, 11.5cm refractor, seeing II, trasnparency Fair) found the 
     east outer ridge brighter in red - inclined to blue. The 
     ALPO/BAA weight=1.


2025-Aug-14 UT 03:58-05:54 Ill=73% Plato observed by Chapman_BW on 1981-12-16

     On 1981 Dec 16 at UT 17:45 B.W. Chapman, Kingston-Upon-Thames, 
     UK, 11.5cm refractor, seeing II, trasnparency Fair) found the 
     west inner ridge lighter in red, and so to the east and south-
     west floor. The ALPO/BAA weight=1.


2025-Aug-15 UT 02:54-04:35 Ill=63% Calippus observed by Frank on 1973-1-25

     Near Calippus 1973 Jan 25 UT 19:20-19:30 Observed by Frank 
     (E.Pepperell, Massachusetts, USA, 6" reflector, x100, S=G) "Bright spot 
     nr. Calippus. Sketch (Calippus alpha, or unnamed peak N. of it?). Est. 
     albedo=8.5 & surroundings at 0.5 at 1015h. Obj. not noticeable at all 
     during 1st 1/2 cycle thru FM in Dec. & Jan. (ALPO-LTP prog.)" NASA 
     catalog weight=0 (very unreliable). NASA catalog ID #1360.


2025-Aug-15 UT 02:54-04:35 Ill=63% Walther observed by Frank on 1973-1-25

     White spot in Walter 1973 Jan 25 UT 19:20-19:39 Observed by 
     Frank (E.Pepperell, Massachusetts, USA, 6" reflector, x100, 
     S=G) "White spot in Walter barely distinct fr. surroundings & 
     crater rim. It's albedo=8, surroundings=7 (ALPO-LTP prog.)" 
     NASA catalog weight=3. NASA catalog ID #1360. ALPO/BAA 
     weight=2.


2025-Aug-15 UT 03:44-05:33 Ill=62% Aristarchus observed by Bartlett on 1976-11-13

     Aristarchus 1976 Nov 13 UT 05:25 Observed by Bartlett (Baltimore, MD, 
     USA, 3" refractor, 54-200x, S=6, T=4) "Floor 8deg except S.=6deg which 
     is also granulated & la pale yellow. Different aspect fr. other obs. at 
     same col. Viol. in outer nimbus. Bright blue-viol. glare where viol. 
     radiance was on 11th. SWBS still large & 9 deg bright." NASA catalog 
     weight=4 (high). NASA catalog  ID #1457.


2025-Aug-16 UT 04:20-06:13 Ill=50% Aristarchus observed by Bartlett on 1976-11-14

     Aristarchus 1976 Nov 14 UT 06:09 Observed by Bartlett (Baltimore, MD, 
     USA, 3" refractor, 54-200x, S=5-4, T=5) "Walls & floor 8deg except S.=
     6deg, SWBS now smaller but still 9deg. S.floor still granulated & now 
     yellow-brown. Strong viol. tint still on outer nimbus but now viol. 
     radiance (gas?) again on ENE rim as on 11th, but not as on 13th"
     NASA catalog weight=4 (high). NASA catalog  ID #1458.


2025-Aug-16 UT 04:58-06:03 Ill=50% Tycho observed by Nibbering_J on 1994-1-4

     On 1994 Jan 04 at UT21:00 J. Nibbering (Rosendaal, Netherlands) 
     obtained a photograph that shows a large crescent of light centred on 
     Tycho crater, but includes also: Lilius, but not to Clavius. Cameron 
     suspects strongly that it was caused by camera lens flare. The Cameron 
     2006 catalog ID=471 and the weight=5. The ALPO/BAA weight=1.


2025-Aug-16 UT 03:07-06:19 Ill=50% Earthshine: Kappa Cygnids: ZHR=5 vel=21km/s

2025-Aug-17 UT 03:34-06:23 Ill=38% Earthshine: sporadic meteors

2025-Aug-18 UT 04:18-06:09 Ill=28% Aristarchus observed by Bartlett on 1976-11-16

     Aristarchus 1976 Nov 16 UT 06:15 Observed by Bartlett (Baltimore, MD, 
     USA, 3" refractor, 54-200x, S=4, T=5) "Crater very dull except EWBS=
     9deg & large. W.glacis=5deg & inner E.wall 6deg. Floor is dull 5deg, 
     c.p.=10 deg. SWBS has disappeared. No viol. anywhere" NASA catalog 
     weight=4 (high). NASA catalog  ID #1460.


2025-Aug-18 UT 04:18-06:27 Ill=27% Earthshine: sporadic meteors

2025-Aug-19 UT 05:23-07:39 Ill=18% Aristarchus observed by Gruithuisen_F on 1821-7-25 *

     On 1821 July 25 at UT 03:30 Gruithuisen (Munich, Germany) observed, 
     near Aristarchus, some brilliant flashing spots on the Earthlit side of 
     the Moon. These disappeared after a short while then re-appeared. The 
     Cameron 1978 catalog ID=90 and weight=4. The ALPo/BAA weight=3.


2025-Aug-19 UT 05:21-06:31 Ill=18% Earthshine: sporadic meteors

2025-Aug-19 UT 07:18-07:39 Ill=17% Aristarchus observed by Jacobs on 1963-11-11 *

     On 1963 Nov 11 at 23:30UT Jacobs (Flagstaff, AZ, USA, 24" refractor, 
     seeing=very good) observed a reddish-orange colour in Aristarchus 
     crater and a sparkle in some areas. The Cameron 1978 catalog weight=3. 
     The ALPO/BAA weight=3