miércoles, 15 de abril de 2015

FENÓMENOS LUNARES TRANSITORIOS A CONFIRMAR EN ABRIL

En la entrada anterior nos referíamos al “gran enigma lunar”, los “fenómenos lunares transitorios”. Quien quiera conocerlos un poco más, puede leer una antigua entrada en nuestra web (http://astroentrerios.com.ar/web/page/197/?option=com_content&task=view&id=471&Itemid=81 ).
El estudio de este enigma es una enorme oportunidad para el aficionado. Su tarea no se limita a la observación directa de un fenómeno tan elusivo. También puede contribuir a la confirmación de FLT producidos con anterioridad. ALPO publica mensualmente un catálogo con la información día por día sobre fenómenos lunares transitorios producidos en el pasado y cuyas condiciones de iluminación se reproducen para observadores ubicados en una determinada zona geográfica y en un horario determinado. La observación de la zona lunar indicada en el horario indicado (que es siempre UT o en castellano TU, tiempo universal) ayuda a confirmar de que se trató de un FLT o de lo que se observó como tal es una rasgo de la zona observada que se vuelve a observar en las mismas condiciones. Este estudio es fascinante, porque nuestra observación será única y tendrá un valor poco común para una observación amateur.
A continuación, la información brindada por ALPO para lo que resta de abril:

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 

2015-Apr-15 UT 08:18-09:53 Ill=15% Earthshine: sporadic meteors 

2015-Apr-16 UT 09:27-09:54 Ill=8% Earthshine: sporadic meteors 

2015-Apr-21 UT 21:49-21:55 Ill=12% Earthshine: Lyrids: ZHR=18 & Eta Puppids & (radio) Delta Piscids 

2015-Apr-22 UT 21:18-21:46 Ill=20% Picard observed by Unknown_English_Observer on 1909-5-23 

     In 1909 May 23 at UT 18:00? an unknown English observer observed a 
     bright spot east of Picard. The Cameron 1978 catalog ID=330 and the 
     weight=1. The ALPO/BAA weight=1.

2015-Apr-22 UT 21:18-21:45 Ill=20% Aristarchus observed by Bornhurst on 1965-12-27 

     On 1965 Dec 27 at UT Bornhurst (Monterey Park, CA, USA, 10" reflector) 
     and (Harris (Whittier? CA, USA, 19" reflector?) observed brightening of 
     Aristarchus in Ashen light. Cameron says that this is an independent 
     confirmation? The Cameron 1978 catalog ID=918 and weight=4. The 
     ALPO/BAA weight=2.

2015-Apr-22 UT 21:48-22:47 Ill=21% Earthshine: Lyrids: ZHR=18 & Eta Puppids & (radio) Delta Piscids 

2015-Apr-23 UT 21:34-23:03 Ill=29% Aristarchus observed by Miles_H on 1990-1-1 

     On 1990 Jan 01 at UT 16:55-18:45 H. Miles (Cornwall, UK) observed that 
     Aristarchus was seen in Earthshine at 16:55UT before the limb (was 
     visible in Earthshine?). "1705 Aris>>1723 fading 1727 > again." Then: 
     "1740 Aris << and just visible at 1845". Apparently Foley suspects that 
     Aristarchus had brightened up before 16:55UT (shwen H. Miles started to 
     observe) and then gradually retruned to normal. The Cameron 2006 
     catalog ID=385 and the weight=0. The ALPO/BAA weight=1.

2015-Apr-23 UT 22:07-23:37 Ill=30% Copernicus observed by Miles_H on 1990-1-1 

     On 1990 Jan 01 at UT 17:29 H. Miles (Cornwall, UK) observed that 
     Copernicus had a faint glow in it. The Cameron 2006 catalog ID=385 and 
     the weight=0. ALPO/BAA weight=1.

2015-Apr-23 UT 23:24-23:40 Ill=30% Aristarchus observed by Struve_F on 1822-1-27 

     On 1822 Jan 27 at UT 20:00? F. Struve (Pulkovo Observatory? Russia) 
     observed near Aristarchus an 8th magnitude star-like point. Seen 
     through overcast! (Klado gave date as 1821 but must be in error 
     according to cameron). The Cameron 1978 catalog ID=95 and the weight=4. 
     The ALPO/BAA weight=2.

2015-Apr-23 UT 23:39-23:40 Ill=30% Aristarchus observed by Celis on 1969-10-16 

     On 1969 Oct 16 at UT 00:00-00:30 Celis (Quilpue, Chile, 3" refractor, 
     x60, seeing=very good) observed brilliant points at 8.5 magnitude in 
     Aristarchus. This was not seen the next night or the one after, nor 
     after 5 days age. The Cameron 1978 catalog ID=1204 and weight=1. The 
     ALPO/BAA weight=1.

2015-Apr-23 UT 21:47-23:42 Ill=30% Earthshine: Lyrids: ZHR=18 & Eta Puppids & (radio) Delta Piscids 

2015-Apr-24 UT 21:16-00:08 Ill=39% Kant observed by Trouvelot on 1873-1-4 *

     Kant 1873 Jan 04 UT 23:00? Observed by Trouvelot (Cambridge, Mass, 8" 
     refractor) "Luminous puplish vapors" NASA catalog weight=3 (average). 
     NASA catalog ID #180.

2015-Apr-24 UT 21:24-22:43 Ill=39% Posidonius observed by Cook_AC on 1984-12-28 

     Posidonius 1984 Dec 28 UT 18:52-18:54 Observed by Cook (Frimley, UK, 
     Moon Blink used, Seeing V, Transparency very poor) "Spurious colour on 
     W. Proclus. Posidonus nothing apart from prominent spurious colour on 
     small bright craterlets. 18:54-18:57 Censorinus - Blue on N red on S. 
     Almost 100% sure that the effect seen in Posidonius was spurious 
     colour" ALPO/BAA weight=1.

2015-Apr-24 UT 21:39-23:12 Ill=39% Proclus observed by Darling_D on 1989-2-11 

     On 1989 Feb 11 at UT23:30-01:39 D. Darling (Sun Praire, WI, USA, 12.5" 
     reflector, x159, seeing=7/10) observed a linear east to west feature in 
     Proclus. D. Weier (WI, USA, 11" reflector, x378) found the NNW part of 
     the crater to be brighter than expected and confirmed the prescence of 
     the east to west feature - this crossed the shadow on the east floor 
     and over into Mare Crisium. R. Manske (WI, USA) detected another 
     "streak" parallel to this. All observers suspect that the linear 
     features were due to raised topography on the floor of Proclus - 
     however Cameron comments that there does not seem to be any linear 
     features on the floor of Proclus to cause these effects. The Cameron 
     2006 catalog ID=351 and the weight=5. The ALPO/BAA weight=2.

2015-Apr-24 UT 21:53-23:30 Ill=39% Aristarchus observed by Johnson_G on 1985-4-26 

     G Johnson of Swanton, MD, USA used a 2" refractor at f/12.
     Aristachus revealed as a red spot on a photo of the Moon. This
     was similar to another photo obtained on 1988 Apr 21st. Frame (with 3
     exposures present)reveals a dim star like point near Campanus on 
     exposure 1. Expsoure 2 shows it a little east on the Earth-lit 
     part. Exposure 3 shows it off the south-east limb. Apparently 20
     minutes later took 2 exposures and frame 18 was a double. The
     second exposure revealed an object farther from the limb but the
     first exposure does not show the object. The two high power exposures 
     do not show it. Cameron could not see the spots that Johson describes
     on his slides, but did see several spots (defects?) on the 
     8 and 12 second exposures near Hevelius and also on the 20 second
     exposure near to Hecataeus only. BAA members observed star like 
     flashes a few hours earlier - near Aristarchus. One BAA member, Madej, 
     had seen a green glow in Arisarchus in two places in two eyepieces.
     Cameron 2006 Catalog extension ID=265 and weight=2. 

2015-Apr-24 UT 21:53-23:30 Ill=39% Campanus observed by Johnson_G on 1985-4-26 

     G Johnson of Swanton, MD, USA used a 2" refractor at f/12.
     Aristachus revealed as a red spot on a photo of the Moon. This
     was similar to another photo obtained on 1988 Apr 21st. Frame (with 3
     exposures present)reveals a dim star like point near Campanus on 
     exposure 1. Expsoure 2 shows it a little east on the Earth-lit 
     part. Exposure 3 shows it off the south-east limb. Apparently 20
     minutes later took 2 exposures and frame 18 was a double. The
     second exposure revealed an object farther from the limb but the
     first exposure does not show the object. The two high power exposures 
     do not show it. Cameron could not see the spots that Johson describes
     on his slides, but did see several spots (defects?) on the 
     8 and 12 second exposures near Hevelius and also on the 20 second
     exposure near to Hecataeus only. BAA members observed star like 
     flashes a few hours earlier - near Aristarchus. One BAA member, Madej, 
     had seen a green glow in Arisarchus in two places in two eyepieces.
     Cameron 2006 Catalog extension ID=265 and weight=2. 

2015-Apr-24 UT 21:53-23:30 Ill=39% Hecataeus observed by Johnson_G on 1985-4-26 

     G Johnson of Swanton, MD, USA used a 2" refractor at f/12.
     Aristachus revealed as a red spot on a photo of the Moon. This
     was similar to another photo obtained on 1988 Apr 21st. Frame (with 3
     exposures present)reveals a dim star like point near Campanus on 
     exposure 1. Expsoure 2 shows it a little east on the Earth-lit 
     part. Exposure 3 shows it off the south-east limb. Apparently 20
     minutes later took 2 exposures and frame 18 was a double. The
     second exposure revealed an object farther from the limb but the
     first exposure does not show the object. The two high power exposures 
     do not show it. Cameron could not see the spots that Johson describes
     on his slides, but did see several spots (defects?) on the 
     8 and 12 second exposures near Hevelius and also on the 20 second
     exposure near to Hecataeus only. BAA members observed star like 
     flashes a few hours earlier - near Aristarchus. One BAA member, Madej, 
     had seen a green glow in Arisarchus in two places in two eyepieces.
     Cameron 2006 Catalog extension ID=265 and weight=2. 

2015-Apr-24 UT 21:53-23:30 Ill=39% Hevelius observed by Johnson_G on 1985-4-26 

     G Johnson of Swanton, MD, USA used a 2" refractor at f/12.
     Aristachus revealed as a red spot on a photo of the Moon. This
     was similar to another photo obtained on 1988 Apr 21st. Frame (with 3
     exposures present)reveals a dim star like point near Campanus on 
     exposure 1. Expsoure 2 shows it a little east on the Earth-lit 
     part. Exposure 3 shows it off the south-east limb. Apparently 20
     minutes later took 2 exposures and frame 18 was a double. The
     second exposure revealed an object farther from the limb but the
     first exposure does not show the object. The two high power exposures 
     do not show it. Cameron could not see the spots that Johson describes
     on his slides, but did see several spots (defects?) on the 
     8 and 12 second exposures near Hevelius and also on the 20 second
     exposure near to Hecataeus only. BAA members observed star like 
     flashes a few hours earlier - near Aristarchus. One BAA member, Madej, 
     had seen a green glow in Arisarchus in two places in two eyepieces.
     Cameron 2006 Catalog extension ID=265 and weight=2. 

2015-Apr-24 UT 22:20-23:54 Ill=39% Aristarchus observed by Classen on 1967-4-15 

     On 1967 Apr 15 at UT 19:15-21:00 Classen (Pulsnitz Observatory, East 
     Germany, 8" refractor) found that Aristarchus was very bright and the 
     atmospheric seeing was very good until 21:00UT. Nothing unsual was seen 
     on 16th and 17th April. Cameron reports that this was the first TLP 
     seen by this group. The Cameron 1978 catalog ID=1022 and the weight=3. 
     The ALPO/BAA weight=2.

2015-Apr-24 UT 22:56-00:37 Ill=40% Aristarchus observed by Stretton on 1794-3-7 

     On 1794 Mar 07 at UT 20:00 Stretton, Wilkins and Msekelyn (England, UK) 
     observed Aristarchus appearing as a light like a star in Earthsine 
     (independent confirmation according to Cameron?). According to Cameron, 
     Maskelyne observed the effect for ~15 minutes. The Cameron 1978 catalog 
     ID=73 and 74 and the weight=5. The ALPO/BAA weight=3.

2015-Apr-24 UT 21:46-00:39 Ill=40% Earthshine: sporadic meteors 

2015-Apr-25 UT 21:15-21:57 Ill=49% Unknown observed by Gaboreau on 1895-9-25 

     On 1895 Sep 25 at UT 20:00? Gaboreau (Paris, France) observed on the 
     Moon s shaft of light (same observation as Cameron's TLP report #281 
     and further more it is on the same day and month as it was back in 
     1893. The Cameron 1978 catalog ID=286 and weight=0. The ALPO/BAA 
     weight=1.

2015-Apr-26 UT 00:11-00:39 Ill=50% Ross_D observed by Cross on 1964-6-17 

     On 1964 Jun 17 at UT 04:15-05:01 Cross et al. (Whittier, CA, USA, 19" ? 
     reflector, S=7-8) observed near Ross D: "Gas cloud. Motion". The 
     Cameron 1978 catalog ID=818 and weight=4. The ALPO/BAA weight=4.

2015-Apr-25 UT 21:45-01:08 Ill=50% Earthshine: sporadic meteors 

2015-Apr-26 UT 01:14-01:35 Ill=50% Agrippa observed by Bartlett on 1966-11-19 

     Agrippa 1966 Nov 19/20 UTC 23:58-00:14 Observed by Bartlett (Baltimore, 
     MD, USA, 5" reflector x283, S=4, T=5) "Faint bluish tinge seen at base 
     of NW wall beneath landslip" NASA catalog weight=4 (high). NASA catalog 
     ID #995.

2015-Apr-26 UT 01:34-03:01 Ill=50% Unknown observed by Paolo_F on 1997-4-14 *

     On 1997 Apr 14 at UT 20:00-22:00 F. Paolo (Legnano, Italy) 
     photographed a lunar flare on the lunar limb.

2015-Apr-26 UT 21:13-22:51 Ill=59% Ptolemaeus observed by Cook_AC on 1978-4-15 

     Ptolemaeus 1978 Apr 15 UTC 21:54-22:20 Observed by A.Cook 
     (Frimley, Surrey, UK, 12" reflector x240, S=IV (Antoniadi)) 
     "Small triangular area on the NW floor of the crater, at the 
     foot of the rim, was slightly brighter in blue light than in red 
     (Moonblink used). Suspected this was due to the poor observing 
     conditions. Certainly blink reaction was not unmistakable". 
     ALPO/BAA weight=2.

2015-Apr-26 UT 22:02-22:33 Ill=59% Archimedes observed by Hill_EG on 1966-3-29 

     Archimedes 1966 Mar 29 UT 21:00 Observed by Hill (England, 24" 
     reflector, x250, S=E) "Brightening of E-W bands across floor. 
     (Obscuration accord. to Moore)" NASA catalog ID #923. NASA 
     catalog weight=3. ALPO/BAA weight=2.

2015-Apr-26 UT 22:59-00:56 Ill=59% Mons_Pico observed by Quinn on 1986-11-9 

     On 1986 Nov 09 at UT 23:00 Quinn (Glebview, IL, USA, 8" reflector, x49-
     x305) found ïn the vicinity of an unnamed ridge points toward Pico- two 
     bright points about 5 magnitudes brighter than any other part of the 
     Moon. The Alpine valley points directly between these two points. "Came 
     from apparently featureless area. Both points about the same size, but 
     different shapes ~ width of alpine valley" The observer used 4 
     different eyepieces and the points were brightest in the lowest power. 
     Other specks of light could be seen in the darkness wound the N point. 
     The Cameron 2006 catalog ID=289 and the weight=3. The ALPO/BAA 
     weight=2.

2015-Apr-26 UT 23:36-01:23 Ill=59% Archimedes observed by Burnerd on 1922-5-4 

     In 1922 May 04 at UT Burnerd (England?) discovered three long mounds in 
     Archimedes crater (rays?). The Cameron 1978 catalog ID=385 and weight=
     0. The ALPO/BAA weight=1.

2015-Apr-27 UT 00:41-02:26 Ill=60% Plato observed by Carle on 1952-2-4 

     On 1952 Feb 04 at UT 02:00? J. Carle (USA, 8" reflector, x180) observed 
     the following in Plato: "A shadow in a depression, or a cloud, or an 
     optical illus.? Oval dark area nr. center, disappeared in 15m clear & 
     prominenet at first then vanished 4 of 14 spots nr. center continuously 
     seen while remaining ones seen only momentarily. (seeing?) Drawing 
     includes sketch on March 7. His sketch shows 18 spots, 13 same as 
     here". The Cameron 1978 catalog ID=549 and the weight=2. The ALPO/BAA 
     weight=2.

2015-Apr-27 UT 00:48-01:56 Ill=60% Alphonsus observed by Wise on 1967-4-17 

     Alphonsus and limb 1967 Apr 17 UTC 21:30 Observed by Wise (England, 
     6.5" reflector, x90) "3 dark patches (Alphonsus) prominent. Suspected 
     red patch (blink ?). (indep. confirm. of Cross 1h later?)." NASA 
     catalog weight=3 (average). NASA catalog ID #1024.

2015-Apr-27 UT 00:48-01:56 Ill=60% Plato observed by Wise on 1967-4-17 

     Plato 1967 Apr 17 UTC 21:30 Observed by Wise (England, 6.5" reflector, 
     x90) "Suspected a blink, (red?)" NASA catalog weight=2 (low). NASA 
     catalog ID #1025.

2015-Apr-27 UT 00:48-01:56 Ill=60% W_Limb observed by Wise on 1967-4-17 

     On 1967 Apr 17 UT 21:30 Observed by Wise (England, 6.5" reflector, x90) 
     saw a brilliant object nr. E(ast. ?) limb (West Lim IAU?) for 15m. 
     Check on star maps neg. (indep. confirm. of Cross 1h later?)." NASA 
     catalog weight=3 (average). NASA catalog ID #1024.

2015-Apr-27 UT 00:59-02:09 Ill=60% Montes_Teneriffe observed by Hart on 1854-12-27 

     nr. Plato in Teneriffe Mountains 1854 Dec 27 UT 18:00-23:00 Observed by 
     Hart & others (Glasgow, Scotland, 10" reflector) "2 luminous fiery 
     spots on bright side on either side of a ridge, contrasting color. 
     Seemed to be 2 active volcanoes. Ridge was normal color. Spots were 
     yellow or flame color. Never seen before in 40 yrs. of observing." NASA 
     catalog weight=4 (high). NASA catalog ID #129. ALPO/BAA weight=4.

2015-Apr-27 UT 01:02-02:27 Ill=60% Alphonsus observed by Jasmin_G on 2003-4-10 

     On 2003 Apr 10 at 00:40UT a GLR observer G. Jasmin (Quebec, Canada, 
     using a 10" F-10 Schmidt Cassegrain) took a photograph of Alphonsus 
     crater on Kodak 400ASA film with an exposure of 1/30th sec. There was a 
     light visible (diameter 10 km) inside Alphonsus and the effect was 
     present for 5 minutes. The observer commented that they have seen a 
     light in this crater many times before, but never as long as 5 minutes.
     This report was submitted to the GLR group in Italy. The ALPO/BAA 
     weight=2.

2015-Apr-27 UT 01:19-02:32 Ill=60% Theaetetus observed by Moore_P on 1952-12-24 

     Thaetetus 1952 Dec 24 UT 20:00? Observed by Moore (England?) 
     "Bright spot, hazy line of light" NASA catalog weight=4. NASA 
     catalog ID 556. ALPO/BAA weigh=2.

2015-Apr-27 UT 01:55-02:32 Ill=60% Plato observed by Lade on 1889-6-6 

     On 1889 Jun 06 at 22:00 UT Lade of France (8" refractor) saw two 
     extremely bright spots (Plato B & D). Cameron 1978 catalog ID=262 and 
     weight=2. ALPO/BAA weight=1.

2015-Apr-27 UT 01:59-02:32 Ill=60% Proclus observed by Darling_D on 1989-2-14 

     On 1989 Feb 14 at UT03:45-04:38 D. Darling (Sun Praire, WI, USA, 12.5" 
     reflector, 3" refractor, x90, seeing=3/10 and transparancy=5) noted 
     that there was a dark patch of brightness 4.5 on the south east of 
     Proclus - it was not as dark as it was on 1988 Jul 22. Cameon comments 
     that the dark patch is normal. The north rim of Proclus was 9.0 in 
     brightness, the floor had a brightness of 6.0, the west rim and south 
     wall were both 7.5. The Cameron 2006 catalog ID=352 and the weight=0. 
     The ALPO/BAA weight=1.

2015-Apr-27 UT 02:00-02:32 Ill=60% Chacornac observed by Khachatryan_S on 2009-8-28 

     On 2009 Aug 28 at UTC 17:00:15-17:00:42 S. Khachatryan (Yerevan, 
     Armenia, 127mm Maksutov-Cassegrain, x171, seeing 9 (1=worst and 10-
     best), Transparency 5-6 on a scale of 1 to 6) observed in the Chacornac 
     area a series of fiery sparks (dot like with tiny rays), slightly 
     elongated with the multitudinal rays orientated towards the south west 
     direction. The colour was mostly red, with some yellow. The final flash 
     was the most clear. The TLP was tiny in area, but "was distinctly 
     bright against any other object on the Moon". The positional 
     uncertainty of the location of the spark effect was approximately +/-
     150 km, based upon an examination of an atlas afterwards. Just prior to 
     the spark effect, something dark, small and fuzzy (only just discrnable 
     to the eye, through the eyepiece) was seen to pass from the west across 
     the Moon in a slight curve, round the surface of the Moon to the east 
     (post observation estimate: seen for 3.5 sec and covered roughly 8% of 
     the lunar diameter in that time). The area of the dark object was 
     comparable in size to (or slightly less than?) craters such as 
     Autolycus F (diameter 3km) or le Monnier E (diameter 4km) i.e. on the 
     limits of vision of the scope used. The location of the flash was not 
     exactly at the same location as the dark object passed across, but gave 
     the impression of starting from it? A back of the envelope calculation 
     of the lunar diameter covered in the time quoted gives an approximate 
     speed (at the lunar distance) of 80km/s or on the very high end of 
     typical meteor streams that pass by. At closer distances, and 
     recalculated velocities, it is unlikely to be a satellite in low Earth 
     orbit (20m/sec at 100km distance), but could perhaps be a bird or 
     insect at a few km range? So was this dark object something in our
     atmosphere by chance passing across the field of view close to the time 
     of the TLP flare or was at the lunar distance and related to the TLP? 
     Incidentally, no attempt was made during this observation to move the 
     scope to check that the TLP remained stationary against the Moon. The 
     ALPO/BAA weight=2.

2015-Apr-27 UT 02:13-02:32 Ill=60% Aristarchus observed by Foley_PW on 1988-2-25 

     On 1988 Feb 25 at UT20:00? P.W. Foley (Kent, UK, 12" reflector) found 
     that Aristarchus was very bright (especially in the UV end of the 
     spectrum) despite other features not being seen in Earthshine. The 
     cameron 2006 catalog ID=318 and the weight=1. The ALPO/BAA weight=1.

2015-Apr-27 UT 22:10-23:31 Ill=68% Aristarchus observed by Madej_P on 1984-12-31 

     Although the crater was on the night side, a small bright spot
     was seen. This was blue, almost UV, and equivalent to a star of
     magnitude 2. It flashed over intervals of about 30 seconds
     and changed in colour from UV to blue. The BAA Lunar Section
     TLP network was alerted. Mobberly and J.Cook did not see much
     although J. Cook may have seen something, but located else where?
     Cameron lists this as a confirmed? observation? The Cameron
     2006 TLP xtension catalog has this TLP with an ID No. of 258
     and a weight of 4. The ALPO/BAA weight is 2.

2015-Apr-28 UT 00:11-01:10 Ill=69% Plato observed by Moore_P on 1995-9-3 

     On 1995 Sep 03 at UR19:40-20:15 P. Moore (Selsey, UK, 15" reflector at 
     x400) observed that the floor of Plato was much darker than he would 
     normally expect and futhermore no interior craterlets were seen. there 
     was however a white patch that was barely visible at the location of 
     the central craterlet should have been. G. North (UK) attempted to 
     observe nut the Moon was too low and seeing terrible. F. Doherty 
     reported Plato normal. Cameron 2006 catalog ID=475 and weight=3. 
     ALPO/BAA weight=2.

2015-Apr-28 UT 00:33-02:24 Ill=69% Linne observed by Tacchini on 1868-7-28 

     Linne 1868 Jul 28 UT 20:00? Observed by Tacchini (Palermo, Italy) 
     "Shadow not so marked-had a light penumbra, indicated a feeble cavity. 
     Other craters had a black shad. On 29th appeared completely white. 
     Crater normal on 26th. (letter to Madler Sep. 16, 1868)." NASA 
     catalog weight=4 (high). NASA catalog ID #159.

2015-Apr-28 UT 00:40-02:17 Ill=69% Plato observed by Carle on 1952-2-5 

     On 1952 Feb 05 at UT 05:10 J.Carle (USA, 8" reflector, x180) 
     observed the following in Plato: "A shadow in a depression, or a 
     cloud, or an optical illus.? Oval dark area nr. center, 
     disappeared in 15m clear & prominenet at first then vanished. 4 
     of 14 spots nr. center continuously seen while remaining ones 
     seen only momentarily. (seeing?) Drawing includes sketch on 
     March 7. His sketch shows 18 spots, 13 same as here". The 
     Cameron 1978 catalog ID=549 and the weight=2. The ALPO/BAA 
     weight=2.

2015-Apr-28 UT 00:49-02:04 Ill=69% Tycho observed by Albert_J on 2010-8-19 

     On 2010 Aug 19 at UT 00:50-01:02 J.Albert (Lakeworth, FL, USA, 
     C11, Transparency 3, Seeing 7-8, 86F and very humid. Oberver 
     checking out repeat illumination condition appearence for Tycho 
     concerning LTP #468 in the 1978 Cameron catalog. Did not see the 
     effect from the original TLP report, but did see, immediately at 
     looking at Tycho a very faint hint of redness in a pencil thin 
     arc (< 1/4 circumference of the rim) confined to the top of the 
     rim of the well-lit north east wall. Coloured arc similar in 
     thickness to Rupes Recta, but not as sharply defined. The outer 
     (E) edge was perhaps sharper than the inner edge. The redness 
     was more on the inside of the top of the rim. The outside of the 
     rim was bright white. This effect was seen in three different 
     eyepieces, at 311x, 224x and 400x. Checked for the effect on 
     other craters nearby but could not see this effect anywhere 
     else. The colour had dissapeared by 01:02UT. The fade took about 
     1-2 minutes. Observation of Tycho continued until 01:06UT, but 
     all seemed normal. Quick checks were made again on Tycho 
     periodically until 02:50UT but the colour was not seen again. 
     ALPO/BAA weight=3.

2015-Apr-28 UT 01:38-02:15 Ill=69% Mare_Humorum observed by Dixon_M on 1989-2-15 

     On 1989 Feb 15 at UT 03:15-03:30 M. Dixon (Palenque Ruins, Mexico, 7x35 
     binouculars) observed a point of light that was very bright in or near 
     Mare Humorum. It was visible for 5 minutes then vanished. The Cameron 
     2006 catalog ID=353 and weight=1. The ALPO/BAA weight=1. 

2015-Apr-28 UT 01:41-03:20 Ill=69% Plato observed by Reese_EJ on 1949-3-9 

     Plato 1949 Mar 09 UT 02:00-03:00 E.J.Reese (6" reflector x240) 
     and one hour later T.R.Hake (5" refractor x300) both unable to 
     see any detail on the floor of Plato, despite both being able to 
     see a "difficult to see" cleft near to the crater Connon. Reese 
     was able to see detail under similar illumination back in 1948 
     and 1947 and saw the floor craterlets in Plato clearly then. 
     ALPO/BAA weight=2. 

2015-Apr-28 UT 01:54-03:29 Ill=69% Copernicus observed by Firsoff on 1955-7-28 *

     Copernicus 1955 Jul 28 UT 20:20 Observed by Firsoff (Somerset, England, 
     6.5" reflector x200) "Great brilliance of the terraces in E(IAU?) wall 
     system(?) gets specular refl. (he gave 0820UT, but must have meant 
     2020" NASA catalog weight=4 (high). NASA catalog No. #600.

2015-Apr-28 UT 22:14-00:06 Ill=77% Proclus observed by Cook_MC on 1982-2-3 

     M.C. Cook (Frimley, UK) got an abnormally low brightness reading for
     Proclus, despite nearby Censorinus being normal. Crater Extinction
     Device used. The Cameron 2006 Extension catalog ID was 163 and the 
     weight was 3. The ALPO/BAA weight was 2 too.

2015-Apr-29 UT 01:39-03:03 Ill=77% Plato observed by Davies_H on 1988-10-20 

     H. Davies (Llamandel, Swansea, (Scotland?), using a 3" refractor,
     detected a short duration reddish hue along the inner NE-NW? rim 
     (4-7 O'Clock location. Sketch supplied to Foley (BAA coordinator)
     No similar effect seen elsewhere. A.C. Cook (Frimley, UK)
     detected spurious colour on several craters, including Plato
     that night. Cameron 2006 Catalog Extension ID=337 and 
     weight=0. ALPO/BAA weight=1.

2015-Apr-29 UT 01:56-03:30 Ill=77% Mare_Crisium observed by Arsyukhin on 1981-6-12 

     Arsyukhin and others (Moscow, USSR), with naked eye and binouculars 
     saw three dark spots suddenly appear on Mare Crisium and disappear 
     approximately 30 minutes later. Cameron 2006 catalog extension ID=145
     and catalog weight=4. ALPO/BAA weight=2.

2015-Apr-29 UT 01:56-03:30 Ill=77% Plato observed by Arsyukhin on 1981-6-12 

     Arsyukhin and others (Moscow, USSR), with naked eye and binouculars 
     saw TLP activity in Plato that Cameron thinks confirms what UK
     observers saw later. Cameron 2006 catalog extension ID=145
     and catalog weight=4. ALPO/BAA weight=1.

2015-Apr-29 UT 02:37-03:51 Ill=78% Alphonsus observed by Jenning on 1966-4-1 

     Alphonsus 1966 Apr 01 UTC(?) 03:00-03:20 Observed by Jenning, Harris 
     (Coral Estates, CA, USA, 12" reflector) "Red patch from c.p. to W. wall 
     (no confirm. from Corralitos obs. moon blink device & obs. at that 
     time)" NASA catalog weight=3 (average). NASA catalog ID #924.

2015-Apr-29 UT 03:28-04:25 Ill=78% Plato observed by North_G on 1980-7-22 

     On 1980 Jul 22 at UT20:08-21:50 G.North (Sussex, UK, 8" reflector, x144 
     and x207, seeing III-V and transparency fair) suspected an obscuration 
     on the north and north west wall. The effect came and went. May have 
     been due to seeing and image contrast? Cameron 2006 catalog ID=101 and 
     weight=1. ALPO/BAA weight=1.

2015-Apr-29 UT 21:10-22:20 Ill=84% Gassendi observed by Cook_AC on 1977-9-23 

     Gassendi 1977 Sep 23 UTC 21:15 Observed by Cook (Frimley, England, 6" 
     reflector x144, Seeing IV (Antoniadi)) "Prominent red dot seen at 
     central peak, also a hint of red on floor in N. quadrant of crater. 
     More likely to be spurious colour than TLP the observer feels"

2015-Apr-29 UT 21:14-23:10 Ill=84% Plato observed by Mobberley_M on 1982-6-2 

     Mobberley could not see the central craterlet on the floor of 
     Plato tonight. Foley notes that he could only just see
     the central craterlet on nights of 2-5th Jun and it was
     of reduced in brightness from normal. North reported
     that the floor seemed nearly black, but brighter in
     a green filter (x144 magnification used). All three
     observers compared the Plato area to other areas for reference.
     Cameron 2006 extension catalog ID 170 and weight=5.
     BAA/ALPO weight=3.

2015-Apr-29 UT 23:21-23:40 Ill=84% Torricelli_B observed by Cook_MC on 1983-4-23 

     A blue tinge was seen inside and outside the crater
     perimeter. The surrounding halo lost brightness that
     was observed on 1993 Jan 29. Observed on Apr 19, 20 and 28th.
     Cameron 2006 extension catalog ID=213 and weight=5.
     ALPO/BAA weight=3.

2015-Apr-29 UT 23:30-01:21 Ill=84% Gassendi observed by Cook_AC on 1978-8-14 

     Gassendi 1978 Aug 14 UTC 21:22-21:35 Observed by Cook (Frimley, 
     England, 12" reflector x240, Seeing V (Antoniadi), Moon blink used) 
     "Blink reaction in filters seen in Gassendi. Spurious colour seen 
     without Moonblink in Gassendi and elsewhere. Moon at -18 deg in
     Declination, hence very low and not suprised to see spurious 
     colour!". ALPO/BAA weight=1.

2015-Apr-30 UT 00:12-02:09 Ill=85% Torricelli_B observed by North_G on 1990-1-7 

     On 1990 Jan 07 at UT 20:20-20:58 G.North (Herstmonceux, UK) thought 
     that he detected dullness in Torricelli B crater - Cameron comments 
     that this cannot be shadow). The Cameron 2006 catalog ID=386 and the 
     weight=3. ALPO\/BAA weight=2.

2015-Apr-30 UT 04:10-05:20 Ill=85% Plato observed by Fauth on 1906-3-6 

     Plato 1906 Mar 06 UT 22:00? Observed by Fauth (Germany? 6" refractor) 
     "Color (brightness?) greatly enhanced as it was to be on the next 
     nite" NASA catalog weight=3 (average). NASA catalog ID #324.

2015-Apr-30 UT 04:19-05:20 Ill=85% Swift observed by Wilkins_HP on 1927-5-12 

     Peice A (Swift=IAU name?) 1927 May 12 UT 22:03 Observed by Wilkins 
     (England, 15" reflector) "Complete obscuration of crater. Saw no trace 
     of it. It was vis. May 11 & faint on May 13. 3x in 1948 Moore saw whole 
     area misty gray & devoid of detail, whereas surroundings were sharp & 
     clear. Birt also found it invis. at times in late 1800's" NASA catalog 
     weight=4. NASA catalog ID #394. ALPO/BAA weight=3.

2015-Apr-30 UT 04:22-05:20 Ill=85% Hyginus observed by Bradford on 1959-9-13 

     Near Hyginus 1959 Sep 13 UT Observed by Bradford (S.Shields, 
     England, 15"? reflector), Feist, Lovas (Hungary), Moore, Wilkins 
     (Kent, England, 7" refractor, x500) "Obliterated by a hovering 
     cloud (Feist disagrees). Budapest obs. saw a cloud at 21:02:30, 
     lasting 5 m. Moore & Wilkins saw burst of light & dust cloud at 
     21:02:35 (confirm.) Drawing by Lovas." NASA catalog weight=5 and 
     catalog ID #722. The ALPO/BAA weight=4.

2015-Apr-30 UT 04:22-05:20 Ill=85% Littrow observed by Bradford on 1959-9-13 

     Littrow, 1959 Sep 13 UT Observed by Bradford (S.Shields, 
     England, 15"? reflector), Feist, Lovas (Hungary), Moore, Wilkins (Kent, 
     England, 7" refractor, x500) "Obliterated by a hovering cloud (Feist 
     disagrees). Budapest obs. saw a cloud at 21:02:30, lasting 5 m. Moore & 
     Wilkins saw burst of light & dust cloud at 21:02:35 (confirm.) Drawing 
     by Lovas." NASA catalog weight=1 and catalog ID #722. The ALPO/BAA 
     weight=1.

2015-Apr-30 UT 04:36-05:20 Ill=85% Aristarchus observed by Weier_D on 1990-1-8 

     On 1990 Jan 08 at UT00:55 D. Weier (Sun Praire, WI, USA, 12.5" 
     reflector, x159) observed an "anomalous black bar across Aris. Nearly 
     digonal to terminator." The nearby crater Prinz had curious shadow 
     patterns, perhaps related to the rising sun projecting shadows from the 
     eastern rim and "reflected down"? "At 0224 W wall had a break in it & a 
     diffuse glow where it should not be. Manske thinks it was Earthshine 
     effect. At 0305 Weier saw Manske's bar - with diffused light and 
     flicker like an aurora - like a gas with electric charge. At 0325 saw a 
     strange glow in Aris. but may be due to atm. though thought it to be a 
     LTP. Darling had never seen such effects before (flickering implies a 
     medium in it)." The Cameron 2006 catalog ID=387 and the weight=3. The 
     ALPO/BAA weight=3.

2015-Apr-30 UT 21:09-21:19 Ill=90% Bailly observed by Miles_H on 1965-5-12 

     On 1965 May 12 at UT 22:20 H. Miles (UK) found a possible 
     obscuration in Bailly crater. Most of the region was as sharp as 
     normal, but the central area was greyish and blurred. Although 
     the observer concerned considered themselves a non-experienced 
     observer, another BAA Lunar Section observer saw the same 
     effect. ALPO/BAA weight=2.

2015-Apr-30 UT 21:09-23:59 Ill=90% Aristarchus observed by Baumeister on 1973-8-10 *

     Aristarchus 1973 Aug 10 UTC 20:14 observed by Baumeister (48.63N, 
     9.25E, 110mm reflector, T=2, S=2) "Orange to red colours at the crater 
     floor dissappeared until 21:04" - Hilbrecht and Kuveler, Earth, Moon & 
     Planets, 30 (1984), p53-61. ALPO/BAA weight=2.

2015-Apr-30 UT 21:09-22:26 Ill=90% Vallis_Schroteri observed by Gray_R on 2004-11-24 

     Aristarchus Area 2004 Nov 22 UT 04:58-05:49 Observed by Gray 
     (Winemucca, NV, USA, 152mm f/9 refractor, seeing 4-5, trasparency 4-5, 
     x114, x228) "Blinked Herodotus with Wratten filters Blue 38A and Red 
     25. The illuminated west crater wall stood out brilliantly in blue 
     light, much more so than in white light. This was true also of 
     Aristarchus. Red light did not increase contrasts in Herodotus any more 
     than they were in white light. Shadows in Herodotus appeared as black 
     as the night west of the terminator and remained that way throughout 
     the observing period. No TLP seen in Herodotus tonight. A possible TLP 
     was seen to the west of Herodotus near the terminus of Schroters 
     Valley. It was noted at the beginning of the observing period that 
     there were four very bright spots of light, one near the end of 
     Schroters Valley, the other three grouped together a little farther 
     north. Although not far from the terminator they were definitely east 
     of it. It was noted that all of them nearly vanished in the Blue 38A 
     filter while Aristarchus and the rim of Herodotus gleamed brilliantly. 
     At 5:19UT it was noted that the most brilliant of the four lights, the 
     one near the terminus of Schroters Valley, had faded almost to 
     invisibility in white light. When first seen it had been brighter than 
     Aristarchus. It remained very dim after this through the remainder of 
     the observing period, and was unchanged at 7:35-7:49UT when I again 
     examined the area. The other three bright spots remained brilliant and 
     unchanged."

2015-Apr-30 UT 21:12-22:22 Ill=90% Aristarchus observed by Kidd_S on 2009-12-28 

     On 2009 Dec 28 at UT17:35 S. Kidd imaged a spot on the inner W 
     rim of Aristarchus. However he thinks that it is an artifact of 
     the software that he used to extract a sharp image out of the 
     acquired video AVI file. The ALPO/BAA weight=1 until we have 
     fully evaluated the situation.

2015-Apr-30 UT 21:15-23:59 Ill=90% Plato observed by Robinson_JH on 1973-8-10 *

     Plato 1973 Aug 10 UT 22:45 observed by Robinson (Devon, UK). 
     Observer noticed that the lighter areas on the floor were more 
     distinct in red than in the blue filter. ALPO/BAA weight=1.

2015-Apr-30 UT 22:42-23:59 Ill=91% Herodotus observed by Hill_H on 1966-11-24 

     Herodotus 1966 Nov 24 UT 21:50 H.Hill (UK, 7.25" reflector, 
     x240), seeing 4-6/10, transparancy 4/5) sketched a central white 
     diffuse patch inside the floor of the crater, with a size of 
     about 1/7th the diameter of the crater. The eastern edge of the 
     white patch was encroached by the shadow of the eastern rim. 
     ALPO/BAA weight=3.

2015-Apr-30 UT 22:59-23:59 Ill=91% Encke_B observed by Blanco_J on 1990-9-1 

     Blanco, J. Vidal, of Gijon, Spain (3" refractor x72)
     noticed an unfamiliar very bright center near to Encke. 
     Cameron suspects that this was Encke B crater
     on the basis that it is a prominent small crater
     near to Encke. Cameron 2006 catalog extension ID=410
     and weight=2. ALPO/BAA weight=1.

2015-Apr-30 UT 23:03-23:59 Ill=91% Proclus observed by Bartlett on 1976-9-6 

     Proclus 1976 Sep 06 UT 02:00 Observed by Bartlett (Baltimore, MD, USA, 
     4.5" reflector 45-300x, S=3, T=5) "Nothing vis. on floor of 2deg 
     brightness. Usually floor ray & Proc. A are vis. at this col. & c.p. is 
     5 deg bright. (must have been 2 deg tonite)." NASA catalog weight=4. 
     NASA catalog ID #1450.

2015-Apr-30 UT 23:04-23:55 Ill=91% Torricelli_B observed by Cook_MC on 1983-4-24 

     All observers saw a blue tinge seen inside and outside the 
     crater. Marshall observed a bright spot in the middle of 
     the crater floor and thought perhaps that it was a central
     peak. No central peak can be found on Lunar Orbiter images.
     Cameron 2006 Catalog extension ID=214 and weight=5. ALPO/BAA
     weight=4.

2015-Apr-30 UT 23:30-23:51 Ill=91% Aristarchus observed by Budine on 1964-2-25 

     Cobra Head, Aristarchus 1964 Feb 25 UT 02:37-02:38, 02:39-02:42 
     Observed by Budine (Binghamton, New York, USA, 4" refractor, x250, S=6, 
     T=4) "Red flashes" NASA catalog weight=3 (average). NASA catalog ID #

     802.