TLP Repeat Illumination/Libration and Earthshine predictions for: Latvia - Riga



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-03 UT 18:06-19:17 Ill=82% Mare_Crisium observed by Williams_AS on 1881-5-9 *

     A.S.Williams of West Brighton, UK, using a 5.25" Calver, x150 and 
     definition fairly good. Observer noticed that the Mare seemed covered 
     with a close network of innumerable streaks, and spotted with countless 
     numbers of light specks, so that it would hardly be possible to 
     delineate them all in one night. The spots and streaks together must 
     have numbered ~1000. The observer had never seen anything like the 
     number of spots and streaks. Peirce A, was not at all easy to see and 
     neighboring spots almost as bright made it difficult to distinguish 
     which one was Peirce A. ALPO/BAA weight=3.


2025-Sep-03 UT 18:06-20:16 Ill=82% Gassendi observed by Spencer_S on 1976-4-10 *

     On 1976 Apr 10 at 21:15-21:49UT S.Spencer (60mm refractor x60, seeing 
     quite good) noticed a faint red glow at the south west wall of Gassendi 
     covering a span of about 35 deg arc. The observer had some doubts about 
     this because they were using a small telescope, but thought that they 
     ought to report it, just in case. A BAA Lunar Section report. ALPO/BAA 
     weight=1.


2025-Sep-06 UT 21:05-21:27 Ill=99% Aristarchus observed by Nicolini on 1984-6-13

     On 1984 ??? ?? at UT11:00-12:00 Jean Nicolini (Campinas, Brazil) 
     saw a daylight TLP in Aristarchus crater. The ALPO/BAA weight=1.


2025-Sep-06 UT 21:07-22:33 Ill=99% Plato observed by Simmons on 1967-4-24

     Plato 1967 Apr 24 UT 02:50 K.Simmons (Jacksonville, FL, USA, 10" 
     reflector) observed a large bright (intensity 6.5) oval area on 
     near the central floor. According to Ricker and Kelsey (ALPO 
     selected area coordinators) this is unusual. ALPO/BAA weight=1.


2025-Sep-06 UT 21:55-22:33 Ill=99% Aristarchus observed by Bartlett on 1959-3-24

     Aristarchus 1959 Mar 24 UT 02:24-02:35 Observed by Bartlett 
     (Baltimore, MD, USA, 4" reflector x180, S=3, T=5) "Strong blue & 
     blue-viol. gl. on E.wall, EWBS, SWBS with intermittent display.
     At this time he noted in his 5-in L a total disappearance of 
     viol. gl. & reappear. 1 min. later. Altogether, found 4 such 
     occurences in his records, in '54, '57, ' & '59."NASA catalog 
     weight=4. NASA catalog ID #716. ALPO/BAA weight=2.


2025-Sep-06 UT 22:33-00:00 Ill=99% Lunar_Eclipse observed by Varros_G on 2008-2-21

     eclipse an unconfirmed impact flash on the Moon. The ALPO/BAA 
     weight=3.


2025-Sep-07 UT 17:45-19:58 Ill=100% Lunar_Eclipse observed by Bye on 1884-10-4 *

     On 1884 Oct 04 at UT 22:00 Bye (Brussels, Belgium) observed
     during an eclipse that the peaks were visible as brilliant 
     points with slight red aureoles during a lunar eclipse. 
     Cameron says that this was a confirmation of #2443. The 
     Cameron 1978 catalog ID= and the weight=5. 
     The ALPO/BAA weight=2.


2025-Sep-07 UT 17:45-20:01 Ill=100% Tycho observed by Parsehlan on 1884-10-4 *

     Parsehlan of England? saw Tycho as a 2nd magnitude star during a total 
     lunar eclipse. The Cameron 1978 catalog ID=244 and weight=5. The 
     ALPO/BAA weight=3.


2025-Sep-07 UT 17:45-19:40 Ill=100% Aristarchus observed by Genin on 1921-10-16 *

     In 1921 Oct 16 at UT 22:00-00:00 Genin and others (Russia) observed 
     during a partial eclipse that different parts of Aristarchus crater had 
     brightness of phosphorecence. Cameron says that this is independent 
     confirmation. The Cameron 1978 catalog ID=383 and weight=5. The 
     ALPO/BAA weight=3. 


2025-Sep-07 UT 17:45-18:54 Ill=100% Lunar_Eclipse observed by deWitt on 1935-7-16 *

     In 1935 Jul 16 at UT 05:01 deWitt (Nashville, Tennessee, USA, 12" 
     reflector) "Photos in lunar ecl. indicate a probable fading of Grim. 
     floor a possible fading of S. tip of Ricc. spot, a possible enlargement 
     of halo around Linne, a possible, but unlikely darkening of Schick's 
     dark areas & no effect on Eratosthenes or white spot E. of Webb. Linne 
     enlargement more pronounced at 1902 ecl. than at any other time. Fading 
     of Ric. spot was pronounced on May 14, 1938". The Cameron 1978 catalog 
     ID=413 and weight=5. The ALPO/BAA weight=3.


2025-Sep-07 UT 17:45-20:44 Ill=100% Atlas observed by Chernov on 1971-8-6 *

     On 1971 Aug 06 at UT 21:00 Chernov (Crimea?, Ukraine, Soviet Union) 
     observed that two large spots in Atlas were not visible in the penumbra 
     after totality (brighter than normal?). The Cameron 1978 catalog ID=
     1306 and weight=2. The ALPO/BAA weight=1.


2025-Sep-07 UT 17:45-20:13 Ill=100% Riccioli observed by Chernov on 1971-8-6 *

     On 1971 Aug 06 at UT 20:30 Chernov (Crimea?, Ukraine, Soviet Union) 
     observed a dark spot in Riccioli that was very dark for 3 minutes, 
     before coming out of shadow - however the dimensions were normal. This 
     was during the lunar eclipse. The Cameron 1978 catalog ID=1305 and 
     weight=3. The ALPO/BAA weight=1.


2025-Sep-07 UT 17:45-20:48 Ill=100% Delambre observed by LeCroy on 1975-11-18 *

     On 1975 Nov 18/19 at UT 23:15-0005 LeCroy Jr and Sr (Springfield, VA, 
     4.5" reflector, S=7) observed that Delambra was one of four glowing 
     spots on the Moon during a lunar eclipse (including Aristarchus). At 
     23:50UT 3 of these patches emerged from the dark and appeared as bright 
     spots compared to other craters "Älbedo=10+". The Albedos of Manilius 
     and Delambre were 8.5 at 00:05UT. Details became apparent in all 3 
     features. The Cameron 1978 catalog ID=1419 abd weight=0. The ALPO/BAA 
     weight=1.


2025-Sep-07 UT 17:45-20:48 Ill=100% Manilius observed by LeCroy on 1975-11-18 *

     On 1975 Nov 18/19 at UT 23:15-0005 LeCroy Jr and Sr (Springfield, VA, 
     4.5" reflector, S=7) observed that Manilius was one of four glowing 
     spots on the Moon during a lunar eclipse (including Aristarchus). At 
     23:50UT 3 of these patches emerged from the dark and appeared as bright 
     spots compared to other craters "Älbedo=10+". The Albedos of Manilius 
     and Delambre were 8.5 at 00:05UT. Details became apparent in all 3 
     features. The Cameron 1978 catalog ID=1419 abd weight=0. The ALPO/BAA 
     weight=1.


2025-Sep-07 UT 17:45-20:48 Ill=100% Menelaus observed by LeCroy on 1975-11-18 *

     On 1975 Nov 18/19 at UT 23:15-0005 LeCroy Jr and Sr (Springfield, VA, 
     4.5" reflector, S=7) observed that Menelaus was one of four glowing 
     spots on the Moon during a lunar eclipse (including Aristarchus). At 
     23:50UT 3 of these patches emerged from the dark and appeared as bright 
     spots compared to other craters "Älbedo=10+". At 23:55UT a ray appeared 
     out of the north east rim of menelaus (Normal?). It appeared just 
     before the artea emerged and increased in brightness. At 23:58UT it 
     decreased and continued to do so. The north east edge of Menelaus 
     appeared very dark at the point that the ray was extending from SW edge 
     (a ridge there) and apperared to obscure features along its path 
     (Albedo=9). The Albedos of Manilius and Delambre were 8.5 at 00:05UT. 
     At 00:05UT the rays were still apparent but seemed to have returned to 
     normal. Details became apparent in all 3 features. The Cameron 1978 
     catalog ID=1419 abd weight=0. The ALPO/BAA weight=1.


2025-Sep-07 UT 17:48-21:43 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 18:10-22:05 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 19:40-22:12 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 20:01-20:06 Ill=100% Moon observed by Gaboreau on 1893-9-25

     On 1893 Sep 25 at UT 21:00? Gaboreau (Paris, France), saw a shaft 
     of light projecting from the Moon. Cameron 1978 catalog ID=281 
     and weight=0. ALPO/BAA weight=1.


2025-Sep-07 UT 20:01-21:23 Ill=100% Aristarchus observed by Chernov on 1954-7-16

     In 1954 Jul 16 at UT 01:12 Chernov (Russia, 2" refractor, x33) observed 
     the following for Aristarchus: "Activity noted in it * in extension of 
     Moon's shadow on sky for 12 min during .17phase of ecl.(source gave 
     date as June 16, but ecl was July 16)". The Cameron 1978 catalog ID=566 
     and weight=1. The ALPO/BAA weight=1. 


2025-Sep-07 UT 20:01-21:10 Ill=100% Atlas observed by Chernov on 1963-7-6

     On 1963 Jul 06 at UT 23:00 (estimated) Chernov (Russia) observed in 
     Atlas 2 large spots that were not visible in penumbra after totality. 
     The cameron 1978 catalog ID=775 and weight=2. The ALPO/BAA weight=1. 


2025-Sep-07 UT 20:01-20:20 Ill=100% Sharp observed by McCord on 1965-11-9

     40.5W, 45.7N 1965 Nov 09 UTC 04:59 Observed by McCord (Mt Wilson, CA, 
     USA, 60" reflector + spectrograph) "Line depth anomaly, low compared 
     with 23 other areas". NASA catalog weight=5 (very high). NASA catalog 
     ID #912.


2025-Sep-07 UT 20:32-00:21 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-07 UT 23:59-01:15 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 21:11-23:06 Ill=98% Aristarchus observed by Kozyrev on 1967-4-26

     On 1967 Apr 26 at UT 03:00 Kozyrev (Crimea?, Soviet Union) observed Gas 
     luminescence in Aristarchus crater. The Cameron 1978 catalog ID=1069 
     and weight=3. The ALPO/BAA weight=3.


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 20:16-21:17 Ill=94% Aristarchus observed by Hall on 1965-11-11

     On 1966 Nov 11 at UT05:55-1000 Hall and Johnson (Port Tabacoo, MD, 16" 
     x400, S=VG), Nordling (MD, USA), Genatt (Greenbelt, MD, USA, 6" 
     refractor, x50, 20" reflector x400) and Wagman (Pittsburgh, PA, 30" 
     refractor) observed the folloowing on Aristarchus: "Color ob c.p. 
     detected with Trident MB, not seen vis. at Port Tobacoo. Network 
     alerted & 6 responded. 4 did not see anything unusual; 2 others did & 
     saw red on c.p. in 6-in refr., but not in 20-in refl. at 400x; other 
     saw indistinctness. Port Taboacoo obs. took 5 rolls of film in blue & 
     red & neutral. Phenom. not detectable on them, but focus poor. Blue 
     images had most detail, whereas would expect red or neutral to. Phenom. 
     still present at dawn in Moon Blink device". The Cameron 1978 catalog 
     ID=914 and weight=5. The ALPO/BAA weight=5.


2025-Sep-09 UT 20:38-21:36 Ill=94% Peirce observed by Darling_D on 1980-3-4

     On 1980 Mar 04 at UT10:30-10:34 D. Darling (Sun Prairie, WI, USA, 
     12.5" reflector, x344) detected a pin-point light in the shadowed area 
     of Mare Crisium that varied in brightness then faded. Cameron 2006 
     catalog ID=84 and weight=0. ALPO/BAA weight=1.


2025-Sep-09 UT 20:41-21:44 Ill=94% Gassendi observed by Haas_W on 1940-9-19

     Gassendi 1940 Sep 19 UTC 06:00 Observed by Haas (New Mexico, 
     12?" reflector) "Largest bright spot in SE part of floor, had I=
     6.7, but 6 for last nite & 5.6 on others (see #'s 469, 472, & 
     474)." NASA catalog weight=4. NASA catalog ID #475. ALPO/BAA 
     weight=2.


2025-Sep-09 UT 22:43-00:33 Ill=94% 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 19:53-20:19 Ill=87% Aristarchus observed by Louderback_D on 1980-8-29

     On 1980 Aug 29 at UT07:32 D. Loudernack (South Bend, WA, USA, 8" 
     reflector, x140) found the south wall to have a broad dark band (only 
     visible in red light) at its base that covered nearly all of the 
     southern half of the crater. The brightness reading was 8.4 (in blue 
     light) and 4 (in red light). Cameron 2006 catalog ID=107 and weight=3. 
     ALPO/BAA weight=3. 


2025-Sep-10 UT 19:53-20:10 Ill=87% Plato observed by Marshall on 1984-11-11

     On 1984 Nov 11 at UT21:00? Marshall (England) noted that there was no 
     normal brightness on the floor to most southernmost craterlet. The 
     Cameron 2006 catalog ID=253 and the weight=2. The ALPO/BAA weight=1.


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 02:02-03:52 Ill=86% 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 03:36-03:52 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 03:31-03:54 Ill=76% 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 03:31-03:54 Ill=76% 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-13 UT 21:24-22:49 Ill=56% Aristarchus observed by Madej_P on 1983-1-5

     On 1983 Jan 05 at UT22:00 P. Madej (Huddersfield, UK) noticed some 
     colour on Aristarchus. The Cameron 2006 catalog ID=195 and the weight=
     2. The ALPO/BAA weight=1.


2025-Sep-13 UT 23:11-01:07 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-13 UT 23:33-03:15 Ill=54% Earthshine: sporadic meteors

2025-Sep-14 UT 22:20-03:17 Ill=42% Earthshine: sporadic meteors

2025-Sep-15 UT 03:23-04:00 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 23:53-01:38 Ill=33% Aristarchus observed by Madej_P on 1983-1-8

     On 1983 Jan 08 at UT01:00? P. Madej (Huddersfield, UK) noticed some 
     colour on Aristarchus. The Cameron 2006 catalog ID=196 and the weight=
     2. The ALPO/BAA weight=1.


2025-Sep-15 UT 23:28-03:19 Ill=31% Earthshine: sporadic meteors

2025-Sep-17 UT 00:44-03:22 Ill=22% Earthshine: sporadic meteors

2025-Sep-18 UT 02:03-03:24 Ill=13% Earthshine: sporadic meteors