In 1958 aug 20 at UT 20:00? an unknown observer noticed that
Promontorium Agarum appeared filled with fog or mist. The Cameron 1978
catalog ID=510 and the weight=3. The ALPO/BAA weight=2.
Plato 1869 Sep 21-22? UTC 00:00? Observed by Gledhill (Halifax, UK, 9"
refractor) "Group I craters-notable illum. accomp. by a single light on
a distinct spot. (similar to Aug. obs. & if same phase as Ap 1870, date
=22nd.). NASA catalog weight=2 (poor). NASA catalog ID #164.
Gassendi 1966 Sep 02 UT 22:55-02:55 Observed by Moseley, Moore,
Gill, Harris, Frost and Hall (Armagh, Northern Ireland, 10"
refractor + Moon Blink, Seeing=fair) and by Cave (England using
a Moon blink) "Eng. Moonblink sys. detected red glows on c.p. &
around it; seen vis. too. (Corralitos obs.at the time? did not
see anything?)" Note that the Arnagh observers were all using
the same telesope, The observing times of M. Cave are not given
but they saw a blink SW of the central peaks. NASA catalog ID
972. NASA catalog weight=5. ALPO/BAA weight=3.
On 1890 Oct 03 at UT 22:00 Muller of Germany saw in Posidonius an
unusual shadow (Moon low? and crater in dark part-terminator 2 deg past
west wall - according to Cameron). Cameron 1978 catalog ID=267 and
weight=3. ALPO/BAA weight=2.
Agrippa 1966 Sep 05 UTC 04:47-05:00 Observed by Bartlett (Baltimore,
MD, USA, 5" reflector, 283x) "Within the wall shadow, the landslip was
faintly illum., est. at 4, & distinctly brownish". S=6-1, T=3-1. NASA
catalog weight=4 (good). NASA catalog ID #975.
On 1958 Dec 02 at UT 06:00 an unknown observer detected a TLP on the
Moon. The reference for this is from Palm, 1967 Icarus. The Cameron
1978 catalog ID=709 and weight=0. The ALPO/BAA weight=1.
On 1975 Mar 04 at UT03:46-06:01 P.W.Foley (Wilmington, Dartford,
Kent, UK, 12" reflector) observed bluesness along the southern
wall of Plato. This is a BAA observation. The Cameron 1978
catalogue ID is #1403 and has a weight of 1. The ALPO/BAA
weight=1.
On 1975 Mar 04 UT 04:01-05:30 P.W. Foley (Wilmington, Dartford, Kent,
UK, 12" reflector, seeing excellent, no turbulence, slight frost and
mist) had a suspicion of blue on the entire north wall of Aristarchus
crater - not seen visually but detected with a Moon Blink device.
Crater extremely bright and unable to penetrate it visually.
Surrounding areas charp. No red/orange on south wall. All other areas
proved negative. Photographs taken. No change in appearance over this
time. ALPO/BAA weight=2.
1965 Oct 16 UTC 08:05-10:00 Observed by McLarin (Huntsville, AL, 20"
reflector), Bates, Hall (Prt. Tobacco, MD, 16" reflector), Hardie
(Nashville, TE, 30" reflector) "Color flashing pulsations
intermittently detected by Trident MB device in Huntsville but not seen
in Md, or vis. by Hardie when alerted. Pulsations in Cassini different
from atmosphere" NASA catalog weight=2 (low). NASA catalog ID #906.
On 1979 Dec 11 at 05:05-05:28 UT A. Crotts (Princton, NJ, USA, CCD
camera and spectrophotometer) "Spectral Photometer recording - digital
pics. With spectral slit. CED eff 2%." Cameron 2006 catalog ID=77 and
weight=5.
On 1979 Dec 11 at 05:05-05:28 UT A. Crotts (Princton, NJ, USA, CCD
camera and spectrophotometer) TLP detected in Mersenius : "Spectral
Photometer recording - digital pics. With spectral slit. CED eff 2%."
Cameron 2006 catalog ID=77 and weight=5. ALPO/BAA weight=4.
Aristarchus 1965 Oct 18 UTC 07:30-07:36 Observed by George, Dervas
(Huntsville, Alabama, 20" reflector x125) "Color with intermittent
displays, detected with Trident MB device. Observers dubious. NASA
catalog weight=2 (low). NASA catalog ID #907.
1965 Aug 21 UTC 06:55-08:05 Observed by Gilheany, Johnson, Segerstrom
(Port Tobacoo, MD, USA) described in the NASA catalog as: "Color patch
detected by Trident; MB device. Color was pink. Astronauts on Gemini 5
saw terrestrial auroras from space on this date". 16" reflector used.
NASA catalog weight=5 (very high). NASA catalog ID No.#890.
Aristarchus 1983 Aug 03 UT 0305-0400 Observed by R,Moseley
(Coventry, UK, 6" reflector, seeing II, Transparency very good).
At the start of the observation, the NE wall and immediate
exterior was the brightest area visible (this is normal) and
seemed tinged with a faint blue/violet. At 03:45 the impression
of colour was fading in the brightening sky, but by 03:55 the
colour was back again with a faint violet/purple surrounding the
whole formation from E clockwise to N. The observer found it
difficult to decide whether it was really a colour on the Moon,
or an optical illusion. ALPO/BAA weight=1.
the previous night". Its diameter is less than 3"
(5-6 km) as judged by comparing with the angular diameter
of Jupiter and also Jupiter's third satellite (the
diameter of the active part of the volcano was at least
twice the angular diameter of Jupiter's Moon). The shape
was an irregular round figure with very sharply defined edges.
It resembled a small piece of burning charcoal, when it is covered
by a thin coat of white ash. The other two volcanos were
much further towards the centre of the Moon and
resembled large faint nebulae that are gradually
much brighter in the middle; but with no well defined luminous
spot within them. These three spots are plainly to be
distinguished from the rest of the marks upon the Moon;
for the reflection of the Sun's rays from Earth is, in its present
situation, sufficiently bright with a ten-foot reflector, to
show the Moon's spots, even the darkest of them. Such
similar phenomena were not perceived in the previous month,
despite using the same telescope. The volcano was not as bright
as his 4th May 1783 sighting (resembling a 4th magnitude star as
seen with the naked eye), though the latter was smaller in diameter.
Cameron's 1978 ALPO catalog has a TLP ID No. of 33 and a weight of
4. The ALPO/BAA catalog weight is 3.
the previous night". Its diameter is less than 3"
(5-6 km) as judged by comparing with the angular diameter
of Jupiter and also Jupiter's third satellite (the
diameter of the active part of the volcano was at least
twice the angular diameter of Jupiter's Moon). The shape
was an irregular round figure with very sharply defined edges.
It resembled a small piece of burning charcoal, when it is covered
by a thin coat of white ash. The other two volcanos were
much further towards the centre of the Moon and
resembled large faint nebulae that are gradually
much brighter in the middle; but with no well defined luminous
spot within them. These three spots are plainly to be
distinguished from the rest of the marks upon the Moon;
for the reflection of the Sun's rays from Earth is, in its present
situation, sufficiently bright with a ten-foot reflector, to
show the Moon's spots, even the darkest of them. Such
similar phenomena were not perceived in the previous month,
despite using the same telescope. The volcano was not as bright
as his 4th May 1783 sighting (resembling a 4th magnitude star as
seen with the naked eye), though the latter was smaller in diameter.
Cameron's 1978 ALPO catalog has a TLP ID No. of 33 and a weight of
4. The ALPO/BAA catalog weight is 2.
There were two other volcanos were much further towards the centre of
the Moon and resembled large faint nebulae that are gradually
much brighter in the middle; but with no well defined luminous
spot within them. These three spots are plainly to be
distinguished from the rest of the marks upon the Moon;
for the reflection of the Sun's rays from Earth is, in its present
situation, sufficiently bright with a ten-foot reflector, to
show the Moon's spots, even the darkest of them. Such
similar phenomena were not perceived in the previous month,
despite using the same telescope. The volcano was not as bright
as his 4th May 1783 sighting (resembling a 4th magnitude star as
seen with the naked eye), though the latter was smaller in diameter.
Cameron's 1978 ALPO catalog has a TLP ID No. of 33 and a weight of
4. The ALPO/BAA catalog weight is 2.
East of Picard (56E, 15N) 1877 May 15 UT 20:30 Observed by an
unknown observer (in England?) "Bright spot. (white patch)
there unlikely to be bright at sunrise normally)." NASA
catalog weight=3. NASA catalog ID #189. ALPO/BAA weight=2.
On 1970 Jul 06 at UT 22:45-23:45 Celis (Paso Hondo, Chile, 3"
refractor, x60, x100, x135, seeing=very good) saw Aristarchus as an
outstanding bright patch (10 deg bright) electric blue colour, every 10
sec groups of 3 or 4 separate sparkles for 10sec then a period of calm
for 30sec-1min. At 130x was almost constant form. Sometimes the form
would be radial like an open band with extended fingers. This was
observed in the dark part of the Moon and Cameron suspects atmopsheric
effects. The Cameron 1978 catalog ID=1264 and weight=2. The
ALPO/BAA weight=2.
On 1978 Jan 12 at 08:21UT (assuming this is not local time) V.A.
Golubev (Ussurian Sam Station, Vladivostock, Russia, x100) saw on the
western edge of the Moon an occultation of the magnitude 6? star
ZC2394. Just prior to the occultation, between the star and the dark
limb could be seen a bridge of light. The ALPO/BAA weight=1.
On 1980 Nov 10 at UT18:05 J-H Robinson (Teighmouth, Devon, UK, Seeing
III, Transparency poor, Filters Wratten 25 (red) and 44A(blue)) found
the area to be bright in red and dull in blue - but suspected that this
might have been a permanent colour blink e.g. natural colour. This does
not have an entry in the 2006 Cameron catalog. ALPO/BAA weight=1.
On 1980 Nov 10 UT 17:55-18:15 J-H Robinson (Teighmouth, Devon, UK)
observed the floor patches in Plato to be easy in red, but not so well
seen in blue. This is a BAA Lunar Section report. ALPO/BAA weight=1.
Note the month or day must be wrong!
Bright spot (in dark part of Moon - confirmation of Arkhipov?). Cameron
1978 catalog weight=5 and Cameron 1978 catalog serial No. 418,
In 1948 Aug 09 at UT 02:40 Woodward (Toronto, Canada, sky very
clear) observed, using a telescope, a bright, bluish-white to
greyish-yellow, 3 sec duration flash in Earthshine. The flash
was between magnitude 0 to 1 if one were looking for a similar
magnitude star in the sky without a telescope. There was
possibly a very slight motion of the flash in a southerly
direction. Also there were two terminal bursts. Cameron suggsts
that this might have been a meteor? Ref: Moore, P.A. Guide to
the Moon (1953), p117. The Cameron 1978 catalog ID=508 and
weight=0. The ALPO/BAA weight=1.
On 1970 Jul 07 at UT 23:00-23:30 Celis (Paso Hondo, Chile, 3"
refractor, x60, x100, x135, seeing=good) observed the following in
Aristarchus: "Similar conditions as last night (#1264) but diminished
in brightness to 40% (to 6deg bright. Real phenom. in the dimming?)".
The Cameron 1978 catalog ID=1265 and weight=3. The ALPO/BAA weight=3.
On 1980 Nov 11 at UT17:35-18:32 G. Blair (Weir, Scotland, UK) at
17:35UT immediately noted that the Earthsine was extremeley bright. All
large detail easily seen on unilluminated disk. 17:38UT a definite pale
reddish brown tinge enveloped the Aristarchus area. 17:39 seemed to be
getting larger and more intense west (IAU) side. Attempted to contact
other observers. 17:40UT Aristarchus still had a bright central peak.
17:50UT fading a little from the west (IAU). 18:00UT slight revival in
brightness. 18:15UT effect still visible when Aristarchus set behind a
high western horizon. The two sketches supplied show the illuminated
region around the crater with extension to the west (IAU). P. Foley
(Kent) found thatAristarchus was bright enough in Earthshine to be seen
with the naked eye. Telescope in operation at 18:00UT and the entire
Aristarchus region was bathed in violet/rose colour with what appeared
to be a strong ray extending to the west (IAU). Detail could be clearly
seen inside Aristarchus crater such as the central zone, west and north
wall and rim in relief from point southeat to northwest. CED measure
0.8 (white), 0.9 (blue), 0.2 (red). No other reading in Earthshine gave
a measure in red. Observation ceased by 18:32UT as the Moon was very
low. ALPO/BAA weight=3.
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.
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.
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.
On 1885 Feb 19 at UT 19:00-20:00, Gray of England?, saw a small crater
(in it?) that was dull red with vivid contrast. The Cameron 1978
catalog ID is 247 and the weight=3. The ALPO/BAA weight=3.
On 1970 Jul 08 at UT 23:00-23:30 Celis (Paso Hondo, Chile, 3"
refractor, x60, x100, x135, seeing=excellent) observed the following at
Aristarchus: "Conditions again similar (to #1264). Brighter tonite(8
deg) than last nite. but not as bright as on the 6th. Pin pts. of light
very accentuated. The radial open hand extended fingers form not so
frequently, perhaps because of the larger crescent illum. now.".
The Cameron 1978 catalog ID=1266 and weight=3. The ALPO/BAA weight=2.
Cyrillus G 1983 Aug 13 UT 20:17-20:59 L. Paynter (Radcliffe,
UK, 22cm reflector, seeing III or better, transparency good).
Cyrillus G was relatively bright and surrounded by a shaded
area. On increasing the magnification from x65 to x130 he became
aware of a diffused "carise" colouration, in and around the
crater. The colouration was similar though to other spurious
colour on the Moon, but unlike other areas affected by spurious
colour, was more diffuse and spread out and not so concentrated.
In view of some uncertainty by the observer, ALPO/BAA weight=1.
On 2012 Mar 28 P. Grego (Cornwall, UK, seeing II, 100mm
refractor, x132) observed a patch of light just inside the NW
rim of Menelaus on the shadowed wall or floor. Computer
visulaiztions of the illumination conditions using a digital
elevation model failed to produce this effect. ALPO/BAA weight=3.
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.
On 1915 Apr 21 at UT 1800? Houdard (France) noticed a special
occurrence south of Posidonius which he took as evidence of water
vapor. The Cameron 1978 catalog ID=351 and weight=3. The ALPO/BAA
weight=2.
Pitiscus 1981 Sep 05 UT ??:?? but assumed to be AM? which would make
it 00:00-03:00UTC. Observed by Slayton (Fort Lauderdale, Florida, USA,
8" reflector, ASA 64EK7 f/170, Kodak Kodachrome) photographed a bright
glow in the crater that appeared to move. Observer also reported seeing
it visually noting that it looked gray with a tinge of red. For further
information see p266 of Sky & Telescope (1991, March). Note that
Cameron gives the date and UT at 1981 Sep 06 UT 01:00-01:30, or one day
later. I will use this date and time from now on. The Cameron 2006
catalog ID=152 and weight=5. The ALPO/BAA weight=3.
In 1982 Sep 24 at 22:45-23:40 K. Marshall (Medellin, Columbia) saw in
Theophilus an obscuration on the south west wall close to Cyrillus and
furthermore it had a red / mauve colouration (seen best in a 12mm Ortho
eyepiece). Through a Wratten 15 yellow filter the region was quite
bright. At23:40UT the obscuration faded. There was plenty of detail in
the region between Theophilus and Cyrils. The Cameron 2006 catalog ID=
184 and the weight=3. The ALPO/BAA weight=3.
Peirce A (Swift=IAU name) 1937 Mar? 23? UTC 22:00 Observed by Wilkins
(England, UK, 12.5" reflector) "Obscuration on floor if crater. Crater
invis. (similar to #394, 396)." NASA catalog weight=4 (high). NASA
catalog ID #412. Note this is almost certainly supposed
to be 1934 Dec 23!
Alphonsus 1967 Aug 13 UT 18:40-18:55 Observed by Horowitz (Haifa,
Israel, 8" reflector?) "Glow or hazy patch seen while using filters.
Brighter than background. Not seen after 2055 or next nite" NASA
catalog weight=3 (average). NASA catalog ID #1041.
On 1972 Apr 21 at UT19:01 Mattingly (Apollo 16 commander, in orbit
around the Moon, using his naked eyes) saw a bright flash from below
his horizon on the lunar farside (approximate longitude=180 deg). he
was dark adapted at the time. However no sesimic event was recorded and
so Cameron suspects that this was not a meteor impact but a cosmic ray
striking his eye. The Cameron 1978 catalog ID=1331 and weight=3. The
ALPO/BAA weight=3.
On 1990 May 03 at UT 02:03 D. Darling (Sun Praire, WI, USA, seeing
steady) observed a point of light inside Alphonsus just to the north
of the central peak, along the "center ridge". It was seen again, half
way between the central peak and the noth west rim - along the ridge.
All other features were normal. The Cameron 2006 catalog ID=403 and the
weight=3. The ALPO/BAA weight=3.
SE of Ross D 1964 Aug 16 UT 04:18-05:20 Observed by Harris and
Cross (Whittler, CA, USA, 19" reflector?) "Bright area.
Condensations varying with time" NASA catalog weight=3. NASA
catalog ID #840. ALPO/BAA weight=3
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.
Proclus 1984 Jul 06 UT 20:29-20:43 light green spot observed by Madej
(England) in the central region. No colour seen elsewhere. At 20:10
Foley (Kent, UK, 12" reflector) had seen a small extending of darkening
in the south east floor (not present 2 hours before) and a lot of fine
detail - though everything was normal again by 22:50UT. At 22:15 Amery
(Reading, UK) found a large dark spot on the south east floor. Other
observers: J and A.cook (Frimley, England) could not confirm but their
seeing was IV and tranparency was poor" Mobberley found no colour and
also no detail on the floor. BAA Lunar Section Report. Cameron 2006
catalog ID=248 and weight=3. ALPO/BAA weight=3.
Linne 1867 Jan 14 UT 20:00 Observed by Knott (England?) "White covering
had seemingly disappeared, was a dark spot. Definition (seeing?) was
poor." NASA catalog weight=1 very low. NASA catalog ID #148.
Morales of France?, observed "an illumination" in Kepler on 1884 Feb 05
at UT20:00?. The Cameron 1978 catalog ID is 241 and the weight=1. The
ALPO/BAA weight=1.
On 1960 Feb 06 at UT14:30 Morozov (Moscow, Russia) saw with the naked
eye a bright point inmovable but with brightness variations in dark
part of Moon, 3days past first quarter, 2days before SR! (says
Cameron). Cameron 1978 catalog ID=728 and weight=3.
On 1972 Apr 22 at UT 18:58-00:28 Hopp (75mm refractor, 1200mm focal
length,transparency 4 out of 5 and seeing 4 out of 5, located at 52deg
30' N and 13deg 15'E) Censorinus brighter than normal relative to
Proclus. Published in Hilbrecht and Kuveler, Moon and Planets, 30
(1984) p53-61. ALPO/BAA weight=1.
On 1974 Mar 02 at UT 23:00 Fitton (Lancashire, UK, 8.5" reflector,
x200, seeing = excellent and transparency = excellent) observed "A fine
deep red line seen at 1st contact with B-ring of Saturn. Nothing
unusual at A-ring contact. Persisted during occult. of B-ring. It
divided into 2 components & space between B-ring & globe cutting ring
into 2 disjointed ends persisted till dark limb passed onto globe of
Saturn, then a short red line corresponding exactly to chord of planet
disk defined by lunar limb. It increased in length as occult.
progressed. It suddenly vanished after 3/4 of globe had been occulted.
No afterglow at spot on limb, no irreg. at limb could be seen. Obs.
eliminates Saturn, telescope, & atmosp. as possible cause. Suggests
refraction from tenuous atm. of destructive interference of reflected
light from very small angle at limb, or diffraction of Saturn light
grazing limb". The Cameron 1978 catalog ID=1389 and weight=1. The
ALPO/BAA weight=1.
Copernicus 1976 Nov 30 UT 19:40 T. Flynn (Edinburgh, UK, 29cm
reflector, Wratten 25 and 44a filters) observed that the
Copernicus craterlet chains werebetter seen through a red
filter than a blue. ALPO.BAA weight=1.
Plato 1976 Nov 30 UT 19:15 T. Flynn (Edinburgh, UK, 29cm
reflector, Wratten 25 and 44a filters) observed that there
were two whitish semi-circular tide like marks enclosing two
dark patches adjoining the interior west wall The observer was
puzzled because if these were two masses of spawning foot
hills, then why would the cental areas, presumably the higher
parts, be dark - when the contrary is usually the case?
ALPO.BAA weight=1.
Purbach 1976 Nov 30 UT 19:40 T. Flynn (Edinburgh, UK, 29cm
reflector, Wratten 25 and 44a filters) observed that the
crater interior was better see through a red filter than a
blue. ALPO.BAA weight=1.
On 1975Mar22 at UT 21:17-21:23 Findlay and Ford (Mills Observatory,
Dundee, UK, 25cm refractor, Wratten 25 and 44a filters used) A white
spot was observed on the rim of Bulialdus that was perhaps slightly
brighter in red than in white light. The observers however decided that
they did not regard this as a TLP. This is a BAA Lunar Section
Observation. ALPO/BAA weight=1.
On 1975 Mar 22 at UT22:10-22:25 T.Flynn (Edinburgh, UK, 30cm
Newtownian, x75) observed 3 large areas on the floor of Plato to be
delicately darker in the blue filter. There were of different darkness.
He did not regard these as TLP, but permanent blinks. This is a BAA
report. The ALPO/BAA weight=1.
On 1991 May 24 at UT 00:05-00:08 UT Romualdo Lourencon (Sao
Paulo, Brazil, 60mm refractor, seeing=III) detected a circular
cloud in Jansen B and H? (Gazateer report says F and K). "The
crater of the event 100km diam. compared to Copernicus, dark
with crescent obscured region below it. Was S of Jansen. A
circular depression there was before LTP in darkness. Wonders if
circ. depr. was shadow of cloud? The Cameron 2006 catalog ID=
428a and the weight=3. The ALPO/BAA weight=1.
On 1997 Dec 09 at UT 18:42-19:02 P. Salimbeni(Cugliate Fabiasco,
Italy, 20cm reflector) observed colour on the northern edge of the
crater - 23A filter used. This is a UAI reported observation and has
come from this organizations web ste. The ALPO/BAA weight=3.
Tycho 1998 Feb 06 UT 22:48-22:54 R. Braga (Corsica (MI),
Italy, 102mm f8.8 refractor, x180, with diagonal, Wratten 23A,
80A and an OR5 filter, seeing II, Transparency good). Observer
noticed that the floor darkened towards the NW (IAU),
particularly with the blue Wratten 80A filter. The ALPO/BAA
weight=1.
Gassendi - 1966 Sep 25 UT 20:20-20:50 observed by Moore and
Moseley(Armagh, N.Ireland, 10" refracfor x140) "Reddish patches,
regarded dubious, owing to low altitude of the Moon". NASA
catalog weight=1. NASA catalog ID #981. ALPO/BAA weight=1.
Plato 1966 Sep 25 UT 23:12-23:35 Observed by Moseley (Armagh, Nortern
Ireland, 10" refractor, x140) "Eng. moon blink sys. blinks inside the
crater. Very dubious due to low alt. of moon." NASA catalog weight=1
(very low). NASA catalog ID #982.
Proclus 1950 Jul 27 UT 02:56 Observed by Bartlett (Baltimore,
MD, USA) described in the NASA catalog as: "C.p. of Proc.
disappeared)" 5" reflector used at x100, NASA catalog weight=4.
ALPO/BAA weight=2.
In 1962 Dec 09 at UT 07:36 Wildey and Pohn (Mt Wilson, CA, USA, 60"
reflector) observed that Oceanus Procellarum was 1.13 magnitudes
brighter than normal. Observation at sunrise and is abnormal if area
measured was mare. If it were an east facing wall it would be normal.
The Cameron 1978 catalog weight=5. The ALPO/BAA weight=2.
On 1977 Dec 24 at UT 19:30-23:20 P.Foley (Kent, UK, 12" reflector).
CED Brightness changes were noted in the central peak and the west
wall. The following features remained relatively steady in comparison:
Proclus, Mon Pico north peak, Mons Piton and Censorinus. Cameron 2006
catalog ID=19 and weight=4. ALPO/BAA weight=3.
On 1891 Sep 17 at UT 18:00? Pickering, based at Arequipa, Peru, and
using a 12" reflector, saw in Schroter's Valley and the vicinity
"Varitions in vapor column. Crater D covered. (there are rays here --
high sun effect on them?) Drawings. Time estimated from given
colongitude)." Cameron 1978 catalog ID=270 and weight=1. ALPO/BAA
weight=1.
On 1980 Sep 24 at UT 21:13-23:50 P.Moore (Selsey, UK) at 22:45 saw loss
of detail in the north west wall, especially in red light, but also
slightly in blue light too. By 22:48 there was activity on the crater
floor i.e. the four bright spots were visible in white light but not in
red. In blue the central spot was seen and there were dark radial
streaks to the south wall and south east. At 22:50 there was a loss of
detail. Other craters were normal. At 23:08 the floor was dark in red,
but some details were visible in blue. the effect had finished by
23:35. At21:34 J-H Robinson found Plato to be normal and no blinks,
though floor clearer in red than in blue, however the floor detail had
gone by 21:57. Blair suspected a dusty patch in north of Plato,
especially in red light. at 21:57 and it started spreading at 21:13,
then east at 21:15 and then north. Though it faded at 21:25 but was
back again at 21:35, and Moon blink colour filters still gave a
reaction at 21:50 - the TLP remained strong until 23:50UT. The Cameron
2006 catalog ID=110 and weight=5. The ALPO/BAA weight=4.