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-Sep-07 UT 21:13-22:05 Ill=100% Unknown observed by Messier on 1783-3-18 *

     Moving glows seen around the middle of the
     disk during a lunar eclipse.


2025-Sep-07 UT 21:13-21:43 Ill=100% Lunar_Eclipse observed by Dyer on 1888-1-28 *

     On 1888 Jan 28 ~UT 23:20 Dyer observed that in this fairly bright lunar 
     eclipse was a dark isosceles triangle, with the base to the north. 
     Other observers noted this effect.


2025-Sep-07 UT 21:13-22:12 Ill=100% Aristarchus observed by Jackson on 1891-5-23 *

     On 1891 May 23 at 18:36-19:15 UT, Jackson of Sheffield, England, using 
     a 6" refractor, saw "1/2 hour before the end of a totl eclipse, a 
     region of the crater and just north of it, become conspicuous and 
     increased in brightness from then on" Cameron thinks this is just the 
     edge of the shadow and possibly normal. Cameron 1978 catalog ID=268 and 
     weight=0. ALPO/BAA weight=1.


2025-Sep-07 UT 22:52-00:21 Ill=100% Unknown observed by Unknown_Observer on 1096-8-12 *

     Bright light seen during eclipse. Date given as 8th
     but the Full Moon was on 6th according to Goldatine's 
     "New & Full Moon's"). ALPO/BAA catalog weight=1.
     Cameron catalog weight=3. Cameron Catalog ID: 4.
     Julian date 1096 Aug 06. Gregorian date 1096 Aug 12.


2025-Sep-08 UT 00:45-01:36 Ill=100% Tycho observed by Rey on 1905-8-16

     On 1905 Aug 15 at UT 03:30 Rey (Marseilles, France) observed Tycho 
     during a lunar eclipse to be visible, indeed it was described as 
     brilliant during the eclipse (mid eclipse 03:31UT). The Cameron 1978 
     catalog ID=322 and weight=1. The ALPO/BAA weight=1.


2025-Sep-08 UT 01:57-02:56 Ill=100% Kepler observed by Classen on 1967-10-19

     Kepler 1967 Oct 19 UTC 05:00 Observed by Classen (Pulnitz Obs. East 
     Germany, 8" reflector) and Corralitos Observatory (Organ Pass, NM, USA, 
     24" reflector + moonblink) "It was 1 mag brighter than aristarchus when 
     normally Aris. is 0.3mag. brighter than Kep. Corralitos MB did not 
     confirm." NASA catalog weight=4 (good). NASA catalogue ID #1052.


2025-Sep-08 UT 05:31-06:32 Ill=100% Linne observed by Frost on 1906-2-9 *

     On 1906 Feb 08 after a lunar eclipse, Frost and Stebbins determined 
     that Linne had enlarged by 1" in size.


2025-Sep-09 UT 01:32-03:04 Ill=98% Aristarchus observed by Bartlett on 1954-7-17

     In 1954 Jul 17 at UT06:50-07:15 Bartlett (Baltimore, MD, USA, S=
     5, T=5-1) observed near Aristarchus: "Pale violet tint on 
     surface NE of crater, no color elsewhere". The Cameron 1978 
     catalog ID=568 and weight=4. The ALPO/BAA weight=1.


2025-Sep-09 UT 23:10-00:33 Ill=93% Aristarchus observed by Miles_H on 1986-4-26

     On 1986 Apr 26 at UT 21:00 etimated) H. Miles (Cornwall?, UK) 
     found that Aristarchus was "still brighter in moments of 
     better seeing". The rim could be seen as a complete circle. 
     The Cameron catalog ID=283 and the weight=3. The ALPO/BAA 
     weight=1.


2025-Sep-09 UT 23:35-01:21 Ill=93% Furnerius_A observed by Hill_H on 1983-1-2

     Furnerius A 1983 Jan 02 UT 00:10 H. Hill (UK) 
     observed that this crater was piercingly bright,
     which he thought was a bit unusual. ALPO/BAA weight=1.


2025-Sep-10 UT 00:48-02:07 Ill=93% Messier_A observed by Moore_P on 1951-8-20

     Messier A 1951 Aug 20 UT 01:48-03:00 Observed by P.Moore 
     (England, 8.5" reflector, x350). Bright cloud like circular 
     patch seen on S wall of Messier A. It was the brightest object 
     in the vicinity. Observations ceased due to the Moon setting 
     behind a tree. W.Haas thinks that this effect is not unusual at 
     similar colongitudes. Moore checked again under similar 
     illumination and still considers the Aug 20 appearance abnormal. 
     NASA weight=4. NASA catalog ID #545. ALPO/BAA weight=2.


2025-Sep-10 UT 01:03-03:00 Ill=93% Plato observed by Haas_W on 1938-5-17

     Plato 1938 May 17 UTC 08:00 Observed by Haas? (New Mexico?, USA, 
     12" reflector?) "Floor-least bit greenish (other colors on other 
     dates, e.g. Je 23, 7/22/37, & 7/15/38)." NASA catalog weight=3 
     (average). ALPO/BAA weight=2. NASA catalog ID #437.


2025-Sep-10 UT 01:23-03:07 Ill=93% Cleomedes observed by Mizon_R on 1991-12-23

     Cleomedes 1991 Dec 23 UTC 22:50 Observed by Mizon (Colehill, 
     Dorset,  UK, 8" f/6 reflector x216) "Oval or pear-shaped ashy 
     glow visible for 2 min, then vanished quite suddenly" - Ref. 
     personal communication received by BAA Lunar Section.


2025-Sep-10 UT 04:42-05:41 Ill=92% Proclus observed by Muller on 1973-1-21

     Proclus 1973 Jan 21/22 UTC 23:57-00:25 Observed by Muller (located at 
     51.42N 8.75E) "Proclus much brighter than Cenorinus" 50mm refractor 
     used. Ref Hilbrecht & Kuveler (1984) Moon and Planets Vol 30 p53-61.


2025-Sep-10 UT 04:49-06:33 Ill=92% Romer observed by Darling_D on 1979-9-9

     On 1979 Sep 09 at UT08:00-08:15 D. Darling (Sun Praire, WI, USA, 12.5" 
     reflector, x75 and photography used, seeing 4/10 and the Moon's 
     altitude was 45deg) photographed Romer crater and recorded two adjacent 
     bright cigar shaped objects - these were the same size as an 
     observation made in 1987. Darling believes that these are ridges. 
     Cameron comments that in LO-IV 192-3,2 a ridge is revealed on the 
     inside wall that matches the description. Cameron 2006 catalog ID=66 
     and weight=2. ALPO/BAA weight=1. 


2025-Sep-10 UT 05:00-06:44 Ill=92% Aristarchus observed by Moore_P on 1982-7-9

     On 1982 Jul 09 at UT 01:05-01:25 P. Moore (Selsey, UK, 12.5"? 
     reflector, seeing III) found that Aristarchus was very bright 
     and slightly blue. Cameron comments that Moore's eyesight is not 
     very blue sensitive. The Cameron 2006 catalog ID=175 and weight=
     4. The ALPO/BAA weight=2.


2025-Sep-10 UT 05:00-06:44 Ill=92% Grimaldi observed by Moore_P on 1982-7-9

     On 1982 Jul 09 at UT01:05-01:25 P. Moore (Selsey, UK, 12.5" reflector, 
     seeing=III) found that Grimaldi A was the 2nd brightest feature on the 
     Moon, and that there was colour detected with a Moon blink device on 
     the floor of Grimaldi. The Cameron 2006 catalog ID=175 and the weight=
     4. The ALPO/BAA weight=3.


2025-Sep-11 UT 01:18-02:27 Ill=86% Macrobius observed by Gray_R on 2005-10-21

     On 2005 Oct 21 at UT 13:07-14:27 R. Gray (Winnemucca, NV, USA, 15cm F/9 
     refractor, x228, seeing 4-5, transparency 5-6) observed a possible TLP 
     in Macrobius. His report is as follows: "Blinked Macrobius with Wratten 
     Filters Blue 38A and Red 29. Macrobius became almost invisible through 
     the Blue 38A and essentially the same as in white light through the Red 
     29. The interior of the crater was completely in shadow. The only part 
     of the east wall that was visible was an apparent high point still in
     the sun and seen as a bright point of light. This faded into darkness 
     before 13:56UT. No sign of any illumination of the east wall crater 
     interior or the interior of the west wall was seen during the
     observation period. The outer west wall was a rough looking, 
     complicated mix of deep shadow and illuminated sunlit terrain." The 
     observer concluded that there was not a TLP - although he did get a 
     filter reaction, this may have been due to the different densities of 
     the filters? ALPO/BAA weight=2.


2025-Sep-11 UT 02:02-03:57 Ill=85% Macrobius observed by Goodacre_W on 1898-12-31

     Macrobius 1898 Dec 31 UTC 20:00 Observed by Goodacre (Crouch End, 
     England, 12" reflector) "Interior nearly filled with shadow at sunset. 
     Inner E.wall very bright-a distinct penumbral fringe to black shad. 
     cast on it from W.wall. Seen best using high powers. (Firsoff & MBMW 
     give date as just 1895 but must be wrong-phase - see  app.ref.)" 
     NASA catalog weight=4 and catalog ID #304. ALPO/BAA weight=2.


2025-Sep-11 UT 03:36-05:33 Ill=85% Proclus observed by Lucas_M on 1989-8-20

     On 1989 Aug 20 at UT13:55 M. Lucas (Melbourne, Australia, naked eye) 
     witnessed a "pin-point flash" in the middle of the lower right quadrant 
     of the Full Moon. Foley suspects that this was in the Proclus region? 
     The Cameron 2006 catalog ID=374 and the weight=2. The ALPO/BAA 
     weight=2.


2025-Sep-12 UT 03:31-04:05 Ill=75% Aristarchus observed by Louderback_D on 1991-7-31

     On 1991 Jul 31 at UT 07:50 D. Louderback (South Bend, WA, USA, 3" 
     refractor) observed that the south floor of Aristarchus was wellow - 
     "almost gold, spilled over S wall on ray toward Herodotus". Cameron 
     comments that Bartlett often reported a yellow floor but not a spill of 
     the colour over to the external ray. Cameron also comments that 
     Louderback's refractor would refract more in blue light than in yellow, 
     therefore she did not think that it was due to chromatic aberation. The 
     Cameron 2006 catalog ID=431 and the weight=3. The ALPO/BAA weight=2. 


2025-Sep-12 UT 03:31-04:05 Ill=75% Mons_Piton observed by Louderback_D on 1991-7-31

     On 1991 Jul 31 at UT 07:50 D. Louderback (South Bend, WA, USA, 3" 
     refractor) found that all of Mons Piton was "unusually dark". Points D, 
     C (E and S resp), usually brightest points, but this time were not 
     bright. "Whole mt was as dark as W wall usually is at this time. In 
     violet filter Piton disappeared completely, but was a little brighter 
     in red filter and points D & G showed. Color not seen by eye. No albedo 
     measured. Suggests red event." Cameron rules out chromatic aberation 
     from Louderback's refractor. The Cameron 2006 catalog ID=431 and the 
     weight=3. The ALPO/BAA weight=1.


2025-Sep-12 UT 06:10-06:50 Ill=75% Plato observed by Foley_PW on 1975-6-28 *

     Plato 1975 Jun 28/29 UT 23:00-01:20. Foley (Wilmington, UK, 12" 
     reflector, seeing, III, good clarity transparency). At 23:00, 
     00:30, and 01:15 blue was seen on the inner wall:floor southern 
     boundary, and red on the corresponding northern floor:wall 
     boundary. However by 01:20, blue was now on the S-NW floor:wall 
     boundary, and red on the NE-SE floor:wall boundary. Atmospheric 
     spectral dispersion existed in many regions, but did not change 
     like the colours in Plato. Similar appearance craters such as 
     Grimaldi, Schickard, and Riccioli, were checked for a similar 
     change in colour, but no change was noticed in these. ALPO/BAA 
     weight=1.


2025-Sep-14 UT 00:12-01:07 Ill=55% Ptolemaeus observed by Schwabe on 1825-12-1

     Ptolemaeus 1825 UT 23:45 Observed by Schwabe (Germany?) "Bright spot"
     NASA catalog weight=4 (high). NASA catalog ID #108. ALPO/BAA weight=3.


2025-Sep-14 UT 04:14-06:11 Ill=53% Plato observed by Moore_P on 1991-12-28

     On 1991 Dec 28 at UT 02:10 P. Moore (Selsey, UK) could see no detail on 
     the floor of Plato crater. This report needs to be read in context with 
     the comments by Cameron for A.C. Cook's observation of the floor of 
     Plato on 1992 Jan 18 - Cameron 2006 catalog ID=438.


2025-Sep-14 UT 00:12-06:01 Ill=52% Earthshine: sporadic meteors

2025-Sep-14 UT 06:27-06:55 Ill=52% Pitatus observed by Unknown_Observer on 1974-6-12

     On 1974 Jun 12 at UT0256 an unknown observer noted a dark blob on the 
     northern edge of the floor of Pitatus crater. 


2025-Sep-15 UT 03:24-05:17 Ill=42% Plato observed by Markov on 1916-1-27

     On 1916 Jan 27 at 22:00? Markov (Russia) noticed that a light sector 
     was visible at the bottom of Plato, in shadow, and contained 3 bright 
     spots, reminiscent of phfescent bodies. The Cmaeron 1978 catalog ID=362 
     and weight=3. The ALPO/BAA weight=3.


2025-Sep-15 UT 01:08-06:04 Ill=41% Earthshine: sporadic meteors

2025-Sep-16 UT 02:20-06:07 Ill=30% Earthshine: sporadic meteors

2025-Sep-17 UT 05:58-07:04 Ill=21% Briggs_A observed by Butler_FC on 1980-2-11

     Briggs A 1980 Feb 11 UT 06:30-07:00 Observed bt Butler_FC 
     (Brixton, UK, 22cm Newtonian reflector, x64, x104, seeing IV). 
     Found Briggs A to be brownish in colour at x64, however the 
     colour vanished at 06:55 when x104 was used. Switching back to 
     x64 the colour was still there but fainter. The colour fade may 
     have been due to day light glare encroaching? Could not see this 
     effect anywhere else on the Moon but did detect what he regarded 
     as a permanent coloured spot (yellow) between Cruger and 
     Grimaldi. ALPO/BAA weight=1.


2025-Sep-17 UT 03:44-06:10 Ill=21% Earthshine: sporadic meteors

2025-Sep-17 UT 06:55-07:04 Ill=20% Aristarchus observed by Bartlett on 1976-10-18

     Aristarchus 1976 Oct 18 UT 07:42 Observed by Bartlett (Baltimore, MD, 
     USA, 4.5" reflector and 3" refractor, S=3, T=5) "Inner E. wall 6 deg 
     with very large EWBS at 8deg. No viol. color anywhere & floor was gray 
     at 4 deg (very low). C.p. is only 8 deg. At base of c.p. between peak & 
     advancing shadow a very faint but definite red glow was seen. It was 
     also seen later in the 3" refr. Was confined to W.base of peak & no 
     color on E. base tho. carefully searched for. This red glow was unique 
     in his experience of 28 yrs. His obs. thru. col. 223deg saw nothing 
     more unusual." Cameron 1978 catalog weight=4 and ID #1455.


2025-Sep-18 UT 05:14-06:13 Ill=13% Earthshine: sporadic meteors

2025-Sep-18 UT 06:34-07:07 Ill=12% Aristarchus observed by Schmidling on 1964-6-6

     On 1964 Jun 28 at UT 08:20-09:10 Schmidling, St Clair, and Platt 
     (Riverdale, New York, USA, 8" reflector, x256) observed in the 
     Aristarchus, Herodotus, Schroter's valley area: two red spot glows, 
     glimmer, looked like ruby gems. Cameron says that the date was 
     predicted by Greenacre and looked for. The Cameron 1978 catalog ID=817 
     and weight=5. The ALPO/BAA weight=4.