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-Jul-16 UT 05:16-05:58 Ill=70% Promontorium_Heraclides observed by Doherty_EG on 1948-7-27

     Heraclides Point 1948 Jul 27 UT 02:00? Observed by Doherty (Stoke-on-
     Trent, England, 3" refractor? or 6" reflector or 10" reflector) 
     "Strangeley blurred & misty; La Place Prom was perfectly sharp." 
     NASA catalog weight=3 (average). NASA catalog ID #507.


2025-Jul-18 UT 04:41-05:15 Ill=48% Rupes_Recta observed by daSilva on 1971-6-16

     On 1971 Jun 16 at UT 07:08-07:09 Raimundo Nonato da Silva 
     (Parnaiba, PI, Brazil, 9.5" reflector, x90, seeing=good) 
     observed during a lunar eclipse that the Straight Wall 
     surroundings were darker than an observation from two days 
     earlier. At 07:09UT tonality became clearer. As dawn was in 
     progress and atmospheric turbulence, not sure if it was a TLP? 
     Other features were normal. The Cameron 1978 catalog ID=1297 and 
     weight=1. The ALPO/BAA weight=1.


2025-Jul-20 UT 05:02-06:09 Ill=26% Wargentin observed by Cave on 1966-9-9

     On 1966 Sep 09 at UT 21:00-21:30 Cave (England, UK, 6" reflector, x364, 
     S=F) observed that the flor of Wargentin was a very dark gray, two 
     shades darker (on scale of 1-10) than the floor of Nasmyth and nothing 
     to be seen on it even along the ridge. A drawing was made. The Cameron 
     1978 catalog ID=976 and weight=3. The ALPO/BAA weight=2.


2025-Jul-21 UT 03:58-06:12 Ill=17% Mercurius_E observed by Takamura_Y on 2004-8-11 *

     Mercurius E (76E, 48N) 2004 Aug 11 UT 18:28:27 Takamura_Y (Ogawamura
     Observatory, 137:59:13E, 36:39:34N) observed a 9th magnitude impact
     flash. This was verified by 2 other observers elsewhere in Japan.
     The ALPO/BAA weight=1.


2025-Jul-21 UT 05:35-06:12 Ill=16% Aristarchus observed by Hiscott on 1969-8-9

     Aristarchus 1969 Aug 09 UT 01:00? Observed by Hiscott 
     (Canterbury, 12" reflector) "Bright spots photog. on E. wall 
     (EWBB) (crater wall seen in ashen light at this time accord. 
     to LION obs.). Pearce, in BAA Circ. 5 (3) says LO 4, fr. 150 
     shows highlights in similar areas & in Cobra Head & are due 
     to slopes.) Spots were on all 8 negs." NASA catalog weight=5. 
     NASA catalog ID #1199. ALPO/BAA weight=3.


2025-Jul-21 UT 05:35-06:12 Ill=16% Gassendi observed by Weeks_A on 2003-8-23

     Near Gassendi 2003 Aug 23 UT 09:00 Observed by Weeks (USA, 88deg 33' 
     W, 22deg 33' N, 20cm reflector) "Observation period ~30 min, terminator 
     straight down middle of Gassendi, very bright spot seen glaring on
     the dark side ~2-3 Gassendi diameters away (SW or NW?). Intense glare 
     unlike anything seen on Moon before. Spot did not brighten or fade. The 
     ALPO/BAA weight=2.