TLP Repeat Illumination/Libration and Earthshine predictions for: Sweden - Stockholm



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-May-01 UT 00:00-00:08 Ill=99% Plato observed by Fox_WE on 1938-2-14 *

     Plato 1938 Feb 14 UT 00:25 Observed by Fox (Newark, England, 
     6.5" reflector, x240) "Prominent gold-brown spot on E. wall 
     with yellow glow without definite boundary, spreading over 
     floor." NASA catalog weight=3. NASA catalog ID #431. ALPO/BAA 
     weight=3.


2026-May-01 UT 20:51-23:36 Ill=100% Torricelli_B observed by Cook_MC on 1993-4-6 *

     On 1993 Apr 06 at UT23:00 M.C. Cook (Frimley, UK) observed a TLP in 
     Torricelli B - "Noted that it was > yellow but only visible in mauve + 
     yellow combined". The Cameron 2006 catalog ID=460 and the weight=4. The 
     ALPO/BAA weight=2. 


2026-May-02 UT 22:43-23:42 Ill=98% Aristarchus observed by Kufer on 1972-3-30 *

     Aristarchus 1972 Mar 30 UTC 23:03-23:05 Observed by Kufer (11.5E, 
     48.25N, 110mm reflector) "A sudden brightening, but observations 
     limited by cloud" Ref: Hilbrecht & Kuveler Moon & Planets (1984) Vol 
     30, pp53-61.


2026-May-18 UT 19:13-19:22 Ill=6% Aristarchus observed by Schroter on 1790-1-17 *

     On 1790 Jan 17 at UT 1800 Schroter (Lilienthal, Germany) observed a 
     small hazt spot of light in the vicinity of Aristarchus crater. The 
     1978 Cameron catalog ID=65 and the weight=4. The ALPo/BAA weight=1.


2026-May-19 UT 19:15-19:48 Ill=13% Moon observed by Unknown_Observer on 1356-5-11

     A guest star trespassed against the moon. Cameron
     suspects that this was a meteor? ALPO/BAA catalog weight=1.
     Cameron 2006 catalog weight=0. Julian date 1356 May 03.
     Gregorian date 1356 May 11.


2026-May-19 UT 19:15-19:54 Ill=13% Aristarchus observed by Gobel on 1824-5-1

     In 1824 May 01 at UT 21:00 Gobel (Koburg, Germany) observed near 
     Aristarchus, a blinking light of magnitude 9-10, in Earthshine. The 
     ALPO/BAA ID=99 and the weight=4. The ALPO/BAA weight=3.


2026-May-19 UT 19:15-21:38 Ill=13% Picard observed by Gray_R on 2002-9-10 *

     Picard 2002 Sep 10 UT 02:30-03:21 Observed by Gray (Winnemucca, NV, 
     USA, 152mm refractor x248,S=2-3, T=5) "observed in White light and 
     through Wratten Red 25  and Blue #38A filters. The crater through the 
     Red 25 filter looked very similar to the view in White light. Using the 
     Blue 38A filter Picard almost dissapeared - it looked like a dim, 
     faintly observable black spot with the sunlit, east facing west crater
     wall barely visible. Observer had not observed Picard very often, so 
     was not too familiar with it but it seemed odd that it almost vanished 
     through the blue filter." ALPO observational report. The ALPO/BAA 
     weight=3.


2026-May-20 UT 19:17-19:52 Ill=22% Aristarchus observed by Gobel on 1824-5-2

     In 1824 May 02 at UT 21:00-21:15 Gobel (Germany, seeing = excellent) 
     saw near Aristarchus (47W, 23N) a soft (matte) light like a star seen 
     through mist. Brightness increased suddenly to magnitude 9-10. After 
     several seconds it became weak, finally disappearing. repeated this 3 
     to 4 times in 15 minutes. The Moon was a very narrow sickle shape and a 
     major feature could be seen in Earthsine. The date given was 1821 but 
     Cameron says it is 1824. The Cameron 1978 catalog ID=88 and weight=4. 
     The ALPO/BAA weight=3. 


2026-May-20 UT 19:17-20:14 Ill=22% Macrobius observed by Persson on 1972-4-17 *

     Macrobius 1972 Apr 17 UT 20:10-20:45 Observed by Persson (Hvidore, 
     Danmark, 2.5" refractor x58 & x100, seeing=good) "Macrob. was a white 
     ring without outline or shadow. (shad. should have been seen--sun  only 
     up 5deg alt. Something was raising albedo from 0 to surround." NASA 
     catalog weight=3 (average). NASA catalog ID #1328.


2026-May-20 UT 19:17-20:14 Ill=22% Proclus observed by Persson on 1972-4-17 *

     Proclus 1972 Apr 17 UT 20:10-20:45 Observed by Persson (Hvidore, 
     Danmark, 2.5" refractor x58 & x100, seeing=good) "Proclus not as clear 
     as usual" NASA catalog weight=3 (average). NASA catalog ID #1328.


2026-May-20 UT 19:17-20:14 Ill=22% W_Limb observed by Hvidore on 1972-4-17 *

     On 1972 Apr 17 at UT 20:10-20:45 Hvidore (Denmark, 2.5" refractor, x58, 
     x100, seeing=good) noted a brightening of the dark limb between 
     Hercynian mountains and Cleostratus crater. Thought that it was due to 
     atmospheric disturbance. Cameron says similar to other reports e.g. No. 
     1156. The Cameron 1978 catalog ID=1330 and weight=1. The ALPO/BAA 
     weight=1.


2026-May-20 UT 20:17-20:45 Ill=22% Aristarchus observed by Gomez on 1969-5-20

     On 1969 May 20 at UT 19:35-20:30 Gomez (Spain, 12" reflector) observed 
     blue-white pulsating light in Aristarchus that illuminated the inner 
     walls - it was maximum at 19:55UT. This observation was made during the 
     Apollo 10 watch. The Cameron 1978 catalog ID=1128 and weight=5. The 
     ALPO/BAA weight=2.


2026-May-20 UT 20:32-20:47 Ill=22% Earthshine: sporadic meteors

2026-May-21 UT 19:19-20:22 Ill=32% Posidonius observed by Andre on 1963-10-22

     In 1963 Oct 22 at UT 21:00? Andre (Belgium, 2.25" refractor) noticed 
     that Posidonius A's shadow was not seen when it should have been seen. 
     The Cameron 1978 catalog ID=777 and weight=3. The ALPO/BAA weight=2.


2026-May-21 UT 19:38-21:11 Ill=32% Aristarchus observed by Reiland on 1975-3-18

     On 1975 Mar 18 at UT 00:57-04:00 Reiland, Brown and Lojeck (Pittsburgh, 
     Pennsylvania, 6" reflector x45 and 8" reflector x200, photos taken) 
     observed the following at Aristarchus: "While obs. Earthshine on moon, 
     saw it glowing -- a bright steady star-like glow, est. at 5-8th mag. 
     First noted at 0057h. Obs. other obj. then came back to it. It was 
     still there -- till moonset (@0500h). Saw it in other telscopes & 
     Lojeck took photos. (photo shows Aris. prominent, but also LaLande, 
     Pytheas & Timocharis. 2 prs. in Aris. but there are other pts on the 
     print, it may be grain)". The Cameron 1978 catalog ID=1404 and 
     weight=5. The ALPO/BAA weight=2.


2026-May-21 UT 20:39-21:11 Ill=33% S_Pole observed by Dzapiashvili on 1969-7-19

     South Cusp 1969 Jul 19 UT 17:55-19:10 Observed by Dzapiashvili 
     (Georgia, Soviet Union) "Saw an abnormally bright spot at end of 
     S.cusp. Polariz. meas. at 8.3% at 1845-1847h (Apollo 11 watch?)"
     NASA catalog weight=5 (very good). NASA catalog ID #1164.


2026-May-21 UT 20:42-21:11 Ill=33% Aristarchus observed by Brandli on 1969-5-21

     On 1969 May 21 at UT 20:00-21:00 Brandli and Germann (Switzerland, 6" 
     refractor) observed a slow orange-red blinking on the surrounding area 
     of Aristarchus. It was seen less markedly the next night. Wald (Zurich, 
     Switzerland) noted at 20:30UT that the crater was pink (Confirmation 
     says Cameron) - this was during the Apollo 10 watch. The cameron 1978 
     catalog ID=1131-1132 and weight=5. The ALPO/BAA weight=4.


2026-May-21 UT 20:35-21:13 Ill=33% Earthshine: sporadic meteors

2026-May-22 UT 19:21-20:16 Ill=43% Cepheus_A observed by Collins_M on 2000-10-4

     Cepheus A 2000 Oct 04 UTC 08:15-08:50 Observer: Maurice Collins 
     (New Zealand, 90cm ETX) - observer noted that crater was 
     extremely bright - wasn't sure if this was normal and at the 
     time rated it as the brightest (contrasty?) crater that he had 
     ever seen on the Moon. Many years later he suspected that he may 
     have mis-identified the crater. This still leaves us with thr 
     problem as to why a crater should be so bright in this region, 
     and if so, which one? ALPO/BAA weight=1.


2026-May-22 UT 20:40-21:25 Ill=43% Helicon observed by Novet on 1788-3-13

     Lunar volcano, seen on the dark side, as bright as a 
     6th magnitude star,


2026-May-22 UT 20:40-21:25 Ill=43% Riccioli observed by Schroter on 1788-3-13

     A bright spot was seen. Cameron 1978 catalog
     ID=40 and weight=3. ALPO/BAA catalog weight=2.


2026-May-22 UT 20:38-21:27 Ill=44% Earthshine: Camelopardalis: ZHR=? (vel=16 km/s)

2026-May-23 UT 19:23-20:32 Ill=54% Mare_Crisium observed by Williams_AS on 1882-3-26

     A.S.Williams of West Brighton, UK, using a 2.75" Acromatic refractor 
     (x75, definition good, but it was too windy to use the 5.25") noticed 
     that the mare was a mass of light streaks and spots. This was not 
     considered unusual, but these features were unusually plain, distinct 
     and brught, especially the streaks. The observer could not recall 
     seeing the streaks so bright and clear with this instrument before, and 
     indeed hardly ever with the larger 5.25" telescope. The observer 
     continued to observe Mare Crisium on many nights for several months and 
     comments that such an unusual exhibition was later seen perhaps once 
     every 2-3 lunations. They are uncertain how much this effect depends 
     upon the state of the Earth's atmosphere. This TLP does not make it 
     into the Cameron 1978 catalog and so may not be a TLP - however it has 
     been included, just in case, and to try to understand what was actually 
     seen. ALPO/BAA weight=1.


2026-May-23 UT 20:41-21:32 Ill=55% Earthshine: Camelopardalis: ZHR=? (vel=16 km/s)

2026-May-24 UT 19:25-20:43 Ill=64% Plato observed by Bianchini on 1725-8-16

     A track of reddish light, like a beam, was seen
     crossing the shadowed floor of Plato.This TLP has an ID
     No. of 17 in Cameron's 1978 catalog and a weight
     of 3. It has an ALPO/BAA weight of 2.


2026-May-24 UT 19:25-20:37 Ill=64% Plato observed by Williams_AS on 1882-3-27

     Plato 1882 Mar 27 UTC 20:10-21:00 Observer: A.S. Williams (Brighton, 
     UK, 5.5" saw the shadow filled floor of Plato at Sunrise with a 
     "Glowing and curious milky kind of light". About 1 hour after sunrise 
     at Plato, there was no trace of this effect. The TLP filled the whole 
     floor except at a quarter of the diameter from the east wall which was 
     actually quite black. The observer saw a curious phosphorescent glimmer 
     at sunset (April11th?). Cameron comments that Birt, Nelson and Waugh 
     saw obsecuring mist or fog in Plato on many occasions. Cameron 1978 
     catalog ID=229 and weight=3. ALPO/BAA weight=3.


2026-May-24 UT 19:25-19:37 Ill=64% Unknown observed by Von_Speisssen on 1887-11-23

     On 1887 Nov 23 at 16:15-17:00 UT Von Speissen & others of Berlin, 
     Germany, using a 3.5" refractor (x180), saw a "Triangular patch of 
     light (time in Middlehurst catalog wrong? Moonrise was at > 18:30h. If 
     year =1887, age=8.8 days & time OK. must be same observation as ID=256 
     in Cameron 1978 catalog - note similarity of names and also the 
     reference date). Cameron 1978 catalog ID=258 and weight=1.


2026-May-24 UT 20:59-21:25 Ill=65% Mare_Anguis observed by Louderback_D on 1979-12-27

     On 1979 Dec 27 at UT 05:32 D. Louderback (South Bend, WA, USA, 6" 
     reflector x240, seeing=3-6/10 and T=4) noticed "2 small high-sun areas 
     nr. Eimmart - brightening around Mare Crisium, except for interior of 
     Proclus - in blue light. They were brighter than 2 spots on Cap. 
     Agarum rated 8.5 & Proc. 9. Not as bright next night. Probably a real 
     blue light brightening". Cameron 2006 catalog ID=79, location on Moon: 
     (70E, 23N) and weight=4. 


2026-May-24 UT 21:03-21:25 Ill=65% Ross_D observed by Harris on 1965-9-4

     On 1965 Sep 03 UT03:00-05:00 D.Harris (Located near Whittier 
     College, Whittier, CA, USA, using a 10" f/8.2 Newtonian 
     reflector, x78 & x208, seeing 5-6, transparency 2-0) observed a 
     ridge obscured SSW of Ross D. No drawing was made, only a 
     written description. "Ridge not visible near crater; possible 
     white patch 1/3 Ross D diameter" The ridge is the wrinkle ridge 
     extending NNE from Ross D, a well established often visible 
     feature. Harris comments that this was not one of the better TLPs 
     seen near Ross D, and there were no independent observers, 
     neverless he was ceratin of this being a TLP, and it was 
     consistant with other activity seen near this crater between 1964 
     and 1970. Cameron 1978 catalog ID 891 and weight=3. ALPO/BAA 
     weight=2.


2026-May-24 UT 21:14-21:25 Ill=65% Plato observed by Brenner on 1895-5-2

     Plato 1895 May 02 UT 20:45, 23:45 Observed by Brenner and Fauth 
     (Germany?) "Streaks of light (Brenner) bright parallel bands in 
     center Fauth (indep. confirmation?)." NASA catalog weight=5. 
     NASA catalog ID #284. ALPO/BAA weight=1.


2026-May-25 UT 19:27-20:32 Ill=74% Clavius observed by Cook_Miss on 1915-4-23

     Clavius 1915 Apr 23 UTC 20:00 Observed by Cook (England?) "Narrow 
     straight beam of light from crater A to B" NASA catalog weight=1 (very 
     poor). NASA catalog ID #352. ALPO/BAA weight=1.


2026-May-25 UT 20:22-21:07 Ill=74% Tycho observed by Abel_P on 2009-5-3

     On 2009 May 03/10 UT23:20-00:11 P. Abel (Leicester, UK, 20cm reflector, 
     x312, seeing III-IV) observed that the north east wall was slightly 
     brighter than would have been expected, slightly blurred (not seeing 
     related blurring) and had a strong orange-brown colour. No spurious 
     colour seen elsewhere. A change in eyepieces showed the same effect. No 
     luck in alerting other observers. A drawing was made at 23:20UT and 
     finished at 00:12UT. At 23:12UT part of the inner NW floor had a dull 
     brown colour, whereas before it was grey.By 00:11UT the colour effect 
     was fading and by 00:18 seeing condirions were too bad to continue. M. 
     Cook (Mundesley, UK, 9cm Questar telescope, x80, x130, seeing III, 
     transparency moderate to good) had observed Tycho earlier in the 
     evening at 22:15UT, but had seen no signs of colour. W. Leatherbarrow 
     (Sheffield, UK, 8cm scope, high cloud interuptions and bad seeing) had 
     taken monochrome images at UT 20:07 and 20:10, but these showed nothing 
     unusual, and he checked the crater visually at 00:00-00:30, but 
     detected no colour, although the Moon's low altitude contibuted to poor 
     seeing conditions and some spurious colour was seen. CCD images from M. 
     Collins (Palmerston North, New Zealand) taken at 00:46UT showed 
     nocolour apart from spurious colour on contrasty edges, in no way 
     reflecting what was seen early by P. Abel. The ALPO/BAA weight=2.


2026-May-25 UT 22:24-23:30 Ill=75% Birt observed by Capen_CF on 1955-4-2 *

     Birt 1955 Apr 15 UT 03:20-05:00 Observed by Capen (California 
     Seeing=Excellent) "Small craters between Birt & wall were invis. at 
     times under excellent seeing, while craterlets on w.side were 
     continually obs." NASA catalog weight=4 (high). NASA catalog ID #586.


2026-May-26 UT 19:29-20:11 Ill=82% Eudoxus observed by Unknown_Observer on 1882-1-29

     On 1882 Jan 29 at UT 17:00-17:30 an unknown observer noted an unusual 
     shadow in Eudoxus crater. The Cameron 1978 catalog ID=227 and the 
     weight=2. Reference: Sirius Vol 15, 167, 1882. The ALPO/BAA weight=2.


2026-May-28 UT 19:33-20:02 Ill=94% Earthshine observed by Saheki_T on 1950-8-25 *

     In 1950 Aug 25 at UT 10:55 T.Saheki (Osaka, Japan) observed a 
     stationary yellow-white flash on the Moon of duration 0.2 sec 
     and mag 6.5. Cameron suggests that this was a meteor. The 
     Cameron 1978 catalog ID=536 and weight=0. The ALPO/BAA weight=1.