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


2020-Jul-01 UT 23:37-00:00 Ill=87% Plato observed by Marshall_KP on 1982-8-1 *

     On 1982 Aug 01 at 00:00-01:00 K. Marshall (Medellin, Columbia, 12" 
     reflector, seeing I-II) noted shading on the east floor of Plato that 
     was apparently lighter than the rest of the floor and this was seen at 
     both low and high magnifications. Foley notes that this was unusual. 
     There were three craterlets visible on the floor - the central one was 
     the brightest. Cameron 1978 catalog ID=178 and weight=3. ALPO/BAA 
     weight=1.


2020-Jul-10 UT 02:02-02:25 Ill=76% Proclus observed by Louderback_D on 1980-8-30 *

     On 1980 Aug 30? at UT 08:00? D. Louderback (South bend, WA, USA, 8" 
     refletor x140) found the north wall to be very bright in red light 
     (this is not normal as it is usually bright in blue - according to 
     Cameron). The brightness was 9.7 (red) and 9 (blue no filter)compared 
     to Eimmart's 8.7. Louderback thought that they observed an oranfe-
     yellow tinge. Cameron 2006 catalog ID=108 and weight=3.


2020-Jul-12 UT 02:34-03:49 Ill=58% Aristarchus observed by Sage_VA on 1978-10-23 *

     Aristarchus 1978 Oct 23 UT 06:30-06:34 V.A. Sage (Bristol, UK, 
     10.25" reflector, x250, Wratten 44a and 25, seeing II) noted 
     that Aristarchus was surrounded by a dark area in the blue 
     filter. They did not regard this as a TLP at the time. However 
     because Aristarchus is surrounded by blue material in real life, 
     this should have been brighter? For this reason, despite the 
     observer regarding this as a negative TLP, an ALPO/BAA weight=1 
     has been applied.


2020-Jul-22 UT 22:50-22:55 Ill=6% Gassendi observed by Spain_D on 1991-4-17 *

     On 1991 Apr 17 at UT 01:22-02:37 D. Spain (Fairdale, KY, USA, 3.5" 
     refractor, x30-x111, S=5/10, T=5.5) observed (UT01:22-02:25) an orange 
     flare and some brighenings in the crater Gassendi. With the naked eye 
     he saw a glowing spot on the Earthshine side of the Moon. When he 
     turned his telescope onto this he found out that this was Gassendi 
     crater. By comparison, Aristarchus was just a small point. Herzog 
     (Racine, WI, USA, 2.5" refractor, x28, S=G and T=6-7) confirmed Spain's 
     observation UT 01:51-02:37?. Darling (Sun Praire, WI, USA, 3" 
     refractor, x56, S=7/10, T=5) did not see anything unusual UT 02:15-
     02:32?. Cameron speculates that the orange colour might be from the 
     Moon's low altitude. The Cameron 2006 catalog ID=421 and the weight=1. 
     The ALPO/BAA weight=1.