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

2025-Jul-16 UT 03:20-03:59 Ill=71% Vallis_Schroteri observed by Pickering_WH on 1891-9-23 

     On 1891 Sep 23 at UT 22:00 Pickering, based at Arequipa, Peru, and 
     using a 12" reflector, saw in Schroter's Valley and the vicinity 
     "Varitions in vapor column. Drawings. Time estimated from given 
     colongitude)." Cameron 1978 catalog ID=272 and weight=1. ALPO/BAA 
     weight=1.


2025-Jul-18 UT 02:42-02:52 Ill=49% Vallis_Schroteri observed by Pickering_WH on 1891-9-25 

     On 1891 Sep 25 at UT 20:00 Pickering, based at Arequipa, Peru, and 
     using a 12" reflector, saw in Schroter's Valley and the vicinity 
     "Varitions in vapor column. Time estimated from given colongitude)." 
     Cameron 1978 catalog ID=273 and weight=1. ALPO/BAA weight=1.


2025-Jul-18 UT 02:42-03:17 Ill=49% Aristarchus observed by Moseley_T on 1968-7-18 

     Aristarchus and Cobra Head 1968 Jul 18 UT 00:50-01:30 
     Observed by Moseley & Corvan (Armagh, N.Ireland, 10" 
     refractor, x255) and by Moore (Selsey, England, 3" refractor, 
     x 120) "Distinct red glow & obscur. 1st at 0050 S. of C.H. & 
     same size. At 0052h saw color on S.wall of Aris. Both 
     persisted till 0100h then both (faded, then brightened, then 
     faded. Plato, Gassendi & Kepler checked with neg. results. 
     Obscured areas reached greatest extent at 0125h wgen it was 
     1/2 size of C.H. & SSE (ast. ?) of it. Moore was alerted to 
     it & saw it in blink, but not vis. at 0107-0220". NASA 
     catalog weight=5. NASA catalog ID 1085. ALPO/BAA weight=4.


2025-Jul-18 UT 03:18-04:04 Ill=49% 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 03:01-04:03 Ill=27% Aristarchus observed by Theiss on 1973-5-27 

     Aristarchus 1973 May 27 UTC 01:09-01:56 Observed by Theiss (51N, 9.67E, 
     75mm reflector) "3 diameters of Aristarchus around its center: orange 
     bright area from 01:09-01:56" Ref: Hilbrecht & Kuveler, Moon & Planets 
     Vol 30 (1984) p53-61"


2025-Jul-21 UT 03:58-04:13 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.