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


2026-Jun-19 UT 19:13-19:20 Ill=28% Plato observed by Schroter on 1788-4-10

     Bright point seen near Plato. A much brighter one was near
     Aristarchus. Apparently seen by both Schroter and Bode.
     The Cameron 1978 catalog ID=43 and weight=5. The
     ALPO/BAA catalog weight=3.


2026-Jun-19 UT 19:13-19:20 Ill=28% Prinz observed by Schroter on 1788-4-10

     Bright point 26" N of Aristarchus rim. Resembled one
     near Plato but less conspicuous. The was a confirmed
     observation by Schroter and Bode?


2026-Jun-19 UT 19:13-19:20 Ill=28% Picard observed by Birt_WR on 1877-6-15

     On 1877 Jun 15 at UT 20:00 Birt (England, UK) observed a bright spot 
     east of Picard. The reason why this was regarded as a TLP, accoridng to 
     Cameron was that it was supposed to be faint or invisible. The Cameron 
     1978 catalog ID=193 and the weight=3. The ALPO/BAA weight=3.


2026-Jun-19 UT 19:13-19:20 Ill=28% Aristarchus observed by Bornhurst on 1965-8-2

     On 1965 Aug 02 at UT 03:57-03:58 Bornhurst (Monterey Park, CA, USA, 
     10" reflector, x240, S=5) observed some star-like flashes in 
     Aristarchus in ashen light. The Cameron 1978 catalog ID=887 and the 
     weight=3. The ALPO/BAA weight=2.


2026-Jun-19 UT 19:13-19:20 Ill=28% Grimaldi observed by Harris on 1969-7-19

     On 1969 Jul 19 at UT 03:53-04:19 Harris (Torrence, CA, USA, 12.5" 
     reflector), Bell (Duarte, CA, USA, 4.5" reflector), and Miller (Ojai, 
     CA, USA). "Harris saw 20 brightenings or light flashes, lasting fr, 1/2 
     to 3s at 03:53:56 (1/2s), 03:54:19 (1s), 03:54:55 (2s), 03:55:06, 
     03:56:54, 03:56:56, 03:58:37, 03:59:58, 04:07:28, 04:15:00, 04:16:02, 
     04:16:45, 04:20:29, 04:21:14. First 4 were confirmed by Bell, Harris 
     also saw 100 mi(160km) long limb brightening (blue) between Aris & 
     Grimaldi, due W. of Aris., brighter than Aris. At 04:14 saw the 
     brightening 1/2 way between Aris. & Grim. as pinkish or orange. Miller 
     at 0417h saw a star-like pulse in W. (IAU?) rim of Grimaldi. (confirm. 
     of Harris'04:16:45 obs. ? Apollo 11 watch)." The Cameron 1978 catalog 
     ID=1161a and weight=3. The ALPO/BAA weight=3.


2026-Jun-19 UT 19:13-19:20 Ill=28% W_Limb observed by Harris on 1969-7-19

     On 1969 Jul 19 at UT 03:53-04:19 Harris (Torrence, CA, USA, 12.5" 
     reflector), Bell (Duarte, CA, USA, 4.5" reflector), and Miller (Ojai, 
     CA, USA). "Harris saw 20 brightenings or light flashes, lasting fr, 1/2 
     to 3s at 03:53:56 (1/2s), 03:54:19 (1s), 03:54:55 (2s), 03:55:06, 
     03:56:54, 03:56:56, 03:58:37, 03:59:58, 04:07:28, 04:15:00, 04:16:02, 
     04:16:45, 04:20:29, 04:21:14. First 4 were confirmedby Bell, Harris 
     also saw 100 mi(160km) long limb brightening (blue) between Aris & 
     Grimaldi, due W. of Aris., brighter than Aris. At 04:14 saw the 
     brightening 1/2 way between Aris. & Grim. as pinkish or orange. Miller 
     at 0417h saw a star-like pulse in W. (IAU?) rim of Grimaldi. (confirm. 
     of Harris'04:16:45 obs. ? Apollo 11 watch)." The Cameron 1978 catalog 
     ID=1161a and weight=3. The ALPO/BAA weight=3.


2026-Jun-19 UT 19:13-19:20 Ill=28% Hipparchus observed by Schnuckel on 1972-3-19

     Hipparchus 1972 Mar 19 UT 21:07-21:29 observed by Schnuckel (52.5N, 
     13.8E, 60mm refractor) "Two sudden white brightenings in the West wall 
     approx 7 magnitude. First was at 21:07 UT and the second was at 
     21:29UT. Both lasted approximately 1 sec in duration." - Hilbrecht and 
     Kuveler, Earth, Moon & Planets, 30 (1984), p53-61


2026-Jun-20 UT 19:13-19:23 Ill=38% Plato observed by Schroter on 1788-4-11

     Bright point seen near Plato. A much brighter one was near
     Aristarchus. Apparently seen by both Schroter and Bode.
     The Cameron 1978 catalog ID=43 and weight=5. The
     ALPO/BAA catalog weight=3.


2026-Jun-20 UT 19:13-19:23 Ill=38% Prinz observed by Schroter on 1788-4-11

     Bright point 26" N of Aristarchus rim. Resembled one
     near Plato but less conspicuous. The was a confirmed
     observation by Schroter and Bode?


2026-Jun-20 UT 19:13-19:23 Ill=38% Aristarchus observed by Bornhurst on 1965-8-3

     On 1965 Aug 03 at UT 04:18-04:24 Bornhurst (Monterey Park, CA, USA, 
     10" reflector, x240, S=F-G) and Leasure and Emanuel (Whittier, CA, USA) 
     observed some star-like flashes in Aristarchus in ashen light 
     (confirmed). The Cameron 1978 catalog ID=888 and the weight=5. The 
     ALPO/BAA weight=4.


2026-Jun-20 UT 19:13-19:23 Ill=38% Unknown observed by Unknown_Observer on 1965-10-1

     On 1965 Oct 01 at 04:00UT an unknown observer saw a TLP (feature name 
     not given in the Cameron catalog - nor a description or reference). The 
     Cameron 1978 catalog ID=897 and weight=1. The ALPO/BAA weigh=1.


2026-Jun-20 UT 19:13-19:23 Ill=38% Aristarchus observed by Kozyrev on 1968-6-1

     On 1968 Jun 01 at UT 21:00? Kozyrev (Crimea?, Soviet Union)
     Gas luminescence seen in Aristarchus crater. The Cameron 1978 catalog 
     ID=1075 and weight=3. The ALPO/BAA weight=3.


2026-Jun-20 UT 19:13-19:23 Ill=38% Proclus observed by Gergoulis on 1969-7-20

     Proclus 1969 Jul 20 UT 03:55-04:15 Observed by Gergoulis, Morley, 
     Sevra, Skinner, and Naumann (Edinburg, TX, 17" reflector, x169) " Texas 
     group got a blink (red, Trident MB) on NW wall. Varied extremely. 
     Increased in brightness in red. Clouds stopped obs. 5 confirmed 
     visualy. (moon nr. horizon, Apollo 11 watch. No blink if spurious?)." 
     NASA catalog weight=3 (average). NASA catalog ID #1170.


2026-Jun-20 UT 19:13-20:11 Ill=38% Burg observed by Moore_P on 1972-5-18 *

     Burg 1972 May 18 UT 20:50-21:45, 22:15-23:00 Observed by Moore 
     (Selsey, England, 12.5" reflector, x350, S=3-4), and Fitton 
     (Lancashire, England, 8.5" reflectpr, x200) "Suspected floor 
     brightening at 2050h with a luminous strip to the SW. Persisted 
     for sometime. Faded at 2110h & invis. at 2145h. Fitton from 
     2215h-2300h saw nothing unusual, (after event tho.)" NASA 
     catalog weight=3. NASA catalog ID #1333. ALPO/BAA weight=1.


2026-Jun-20 UT 19:15-19:23 Ill=38% Aristarchus observed by Younger on 1969-7-20

     On 1969 Jul 20 at UT 0530-0540 Younger and Byl (Victoria, BC, Canada, 
     48" reflector) saw a fuzzy brightening near Aristarchus of less than 
     0.5 minute of arc diameter (Apollo 11 watch). The Cameron 1978 catalog 
     ID=1171 and weight=4. The ALPO/BAA weight=2.


2026-Jun-21 UT 19:13-19:18 Ill=49% Bessel observed by Dennett_F on 1877-6-17

     Bessel 1877 Jun 17 UT 22:30 Observed by Denett (England?, 2.75" 
     reflector) "Tho't he could detect a minute pt. of light shining out of 
     dark crater. (no high peaks in Bessel to catch light.)" NASA catalog 
     weight=3 (average). NASA catalog ID #194. ALPO/BAA weight=3.


2026-Jun-21 UT 19:13-19:18 Ill=49% Aristarchus observed by Bornhurst on 1965-8-4

     On 1965 Aug 04 at UT 04:02-04:04 Bornhurst (Monterey Park, CA, USA, 
     10" reflector, x240, S=F-G) observed some star-like flashes in 
     Aristarchus in ashen light. The Cameron 1978 catalog ID=889 and the 
     weight=3. The ALPO/BAA weight=2.


2026-Jun-21 UT 19:13-19:18 Ill=49% Unknown observed by Unknown_Observer on 1965-10-2

     On 1965 Oct 02 at 04:00UT an unknown observer saw a TLP (feature name 
     not given in the Cameron catalog - nor a description or reference). The 
     Cameron 1978 catalog ID=898 and weight=1. The ALPO/BAA weigh=1.


2026-Jun-21 UT 19:13-21:21 Ill=49% Theophilus observed by Ruchatz on 1972-5-19 *

     Theophilus 1972 May 19 UT 23:48 Theophilus observed by Ruchatz (51N 
     10E, 60mm refractor, T=4, S=2) "Diminution of brightness of the S wall 
     for a short time" - Hilbrecht and Kuveler, Earth, Moon & Planets, 30 
     (1984), p53-61.


2026-Jun-22 UT 19:13-21:24 Ill=59% Mons_Piton observed by Schneller on 1960-12-26 *

     Piton 1960 Dec 26 ? UT 00:00? Observed by Schneller (Cleveland, OH, 
     USA, 8" Reflector, x53), "Red obscuration; less intense than Nov. (date 
     not given, but discussion suggests near SR, therefore Dec 28th most 
     likely date -- ancill. data given for 28th)." NASA catalog weight=3 
     (average). NASA catalog ID #732.


2026-Jun-22 UT 19:13-20:31 Ill=59% Torricelli_B observed by Gray_R on 2002-10-14 *

     Torricelli B 2002 Oct 14 UT 02:58-03:43 Observed by Gray (Winnemucca, 
     NV, USA, 152mm refractor x114, x305, seeing Antoniadi III, transparency 
     good) "I was out this morning (2:58-3:43 UT, October 14, 2002) 
     observing Torricelli B. At 3:17 UT the west sunlit wall of the crater 
     brightened from an intensity (Elger Scale) of 5.0 to 9.0. In actual 
     terms it went from slightly less bright than the walls of Picard to as 
     bright as the sunlit west wall of Dionysius. This was observed at 114x 
     in white light, where all three craters were in the field of view 
     simultaneously. This event lasted less than a minute and no comparable
     brightening in Dionysius or Picard was seen. The wall of Torricelli B 
     returned to 5.0 in brightness. I continued to observe Torricelli B in 
     white light until 3:43 UT, but the brightness remained at 5.0. Before 
     the brightening I tried blinking Torricelli with the following 
     combinations of filters: Wratten Red 25 and Blue 38A, Red 25 and Blue 
     80, and Red 25 and Schott BG38 (Blue Green). Nothing showed up more 
     prominently in any combination except the Red 25-Blue 38A combination, 
     where Torricelli B became invisible in the Blue, probably because of 
     the filter density. Both the Blue 80 and Schott BG 38 seemed closer in
     density to the Red 25 than the Blue 38A is. I could not see any details 
     inside Torricelli B during this session, including the bright spot on 
     the NE rim." The ALPO/BAA weight=3.


2026-Jun-24 UT 19:13-19:27 Ill=77% Manilius observed by Kern on 1972-5-22 *

     Manilius 1972 May 22 UTC 20:10-20:40 observed by Kern (48deg 45'N, 8deg 
     45'E, 60mm refractor) "The SW inner wall became brighter at times" - 
     Hilbrecht and Kuveler, Earth, Moon & Planets, 30 (1984), p53-61.


2026-Jun-25 UT 19:13-21:22 Ill=85% Plato observed by Crick on 1979-12-29 *

     On 1979 Dec 29 at UT 17:45-18:20 Crick (Merchtem, Belgium, 6" 
     reflector, x140, seeing=III) found a violet spot in the NW inner wall. 
     The floor was obscured of detail on the northern half. All other 
     regions studied appeared normal. Observer unsure if this was a TLP or 
     spurious colour. Cameron 2006 catalog ID=80 and weight=3. ALPO/BAA 
     weight=3.


2026-Jun-25 UT 21:14-21:22 Ill=85% Gassendi observed by Cook_AC on 1979-12-29 *

     Gassendi 1979 Dec 29 UTC 20:09-22:04 - Observer: Cook (Frimley, Surrey, 
     UK) "Colour seen - almost certainly spurious colour and not a TLP".
     ALPO/BAA weight=1.