Peirce A (Swift=IAU name?) 1937 Dec 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.
On 1961 Jul 01 at UT 00:00? an unknown Miranova (Russia or Israel) obtained some spectral photometry of lunar objects. A spectral plate in 425 -> 500nm bands. The Cameron 1978 catalog ID=743 and weight=5. The ALPO/BAA weight=3.
Aristarchus 1970 Jan 25 UT 07:00? Observed by Thomas, Rogers, Corralitos Observatory (Organ Pass, NM, USA, 24" reflector, Moon blink) "Bluing around the crater -- vis. in monitor but not photographe due to clouds" NASA catalog weight=4 (high). NASA catalog ID #1233
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.
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.
Aristarchus 1976 Oct 18 UT 07:42 Observed by Bartlett (Baltimore, MD, USA, 4.5" reflector and 3" refractor, S=3, T=5) "Inner E. wall 6 deg with very large EWBS at 8deg. No viol. color anywhere & floor was gray at 4 deg (very low). C.p. is only 8 deg. At base of c.p. between peak & advancing shadow a very faint but definite red glow was seen. It was also seen later in the 3" refr. Was confined to W.base of peak & no color on E. base tho. carefully searched for. This red glow was unique in his experience of 28 yrs. His obs. thru. col. 223deg saw nothing more unusual." Cameron 1978 catalog weight=4 and ID #1455.
On 1964 Jun 28 at UT 08:20-09:10 Schmidling, St Clair, and Platt (Riverdale, New York, USA, 8" reflector, x256) observed in the Aristarchus, Herodotus, Schroter's valley area: two red spot glows, glimmer, looked like ruby gems. Cameron says that the date was predicted by Greenacre and looked for. The Cameron 1978 catalog ID=817 and weight=5. The ALPO/BAA weight=4.
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.
In 1900 Nov 26 at UT 19:00? an unknown observer (in Europe) observed a suspicious obscuring phenom on a dark plain (mare). The cameron 1978 catalog ID=307 and the weight=2. The ALPO/BAA weight=1.
1951 Mar 13 UT 01:35:50 L.T.Johnson (USA) observed a faint flash near W limb in earthshine - just S of Grimaldi. ALPO/BAA weight=1.
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 Johnson 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.
In 1948 Apr 15 at UT 20:00? Vince (England, UK) observed a bright spot, about magnitude 3, in Earthshine, about 30deg north of Grimaldi., on the west limb (90W, 25N). The Cameron 1978 catalog ID=503 and the weight=3. The ALPO/BAA weight=3.
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.
On 1982 Jul 27 at UT 20:04 P. Madej (Newsome, Huddersfield, UK, 16cm reflector, x33, seeing I to II, transparency fair, Hoya linear type polarizer filter) observed that when the filter was used on Mare Crisium, that the north part became a bright gray when turned to 45deg, but when turned the other way it returned to normal. The ALPO/BAA weight=3.
On 1973 Dec 02 at UT 22:17:33 Barrett and Brick (New York, 3.5" Questar freflector) observed an occultation of Kappa Aquari, a wide double star, on the western limb. The star faded perceptably before disappearing. Cameron says that the fact that the star was a double was not an explanation - she says that there are many reports of similar fades for single stars. The Cameron 1978 catalog ID=1384 and weight=4. The ALPO/BAA weight=1.
Mobberley and Foley note that Aristarchus was very prominent in Earhshine. Little other detail seen in Earthshine other than the limb. The Cameron 2006 extension catalog then says: "Confirm moving side to side. Saw bright blue spot in center" however it is unclear whether this refers to Aristarchus, or Torricelli-B - the latter was also undergoing a TLP at this time. Cameron 2006 extension catalog ID=267 and weight=5 (confirmed?).
On 1985 Apr 27 UT 22:00 M. Mobberley (Suffolk, UK) could not see much detail in Earthshine (apart from Aristarchus), except that there was a brightness on the western limb of the Moon. The Cameron 2006 catalog ID=267 and the weight=5. The ALPO/BAA weight=1.
On 1985 Oct 11 at UT 04:56-05:12 D. Louderback (South Bend, WA, USA, 4" refractor, x95, seeing=1-2-1 and transparency=4) detected a change in brightness of Mons Piton point D (his designation) during 04:56- 04:59. The whole of the east slope was affected - initially bright and then faded and there was a blue colour (detected with filters). The variabilty was 8-11sec (Cameron suspects atmosphere as the altitude was low). The brightness stabilized at 05:12UT, but variability resumed until observing finished. As a comparison Aristillus was not seen to change. The Cameron 2006 catalog ID=287 and the weight=1. The ALPO/BAA weight=1.
2004 Nov 20 UT 02:34:03 R. Spellman (120mm F8.3 refractor at prime focus, PC23C CCTV camera, via a DVD recorder) recorded a flash of light. The ALPO/BAA weight=2.
1996 Apr 27 UTC 02:26-03:14 Observed by Spellman (Los Angeles, CA, USA) " 02:26 U.T. Sunrise on Tycho 3/4 of the crater was in shadow, topmost section of the central peak was in sunlight. In white light brightness of the central peak rivaled the brightness of the Eastern (sunlit) wall. No change was detected in red light, however in blue light definite strong darkening was observed. Blink obtained when viewing thru 25A and 38 filters. At 2:52 U.T. in the poor to fair seeing the apparent size of the central peak in white and red light was the same, in blue light the central peak in white and red light was the same, in blue light the central peak size shrank to 1/2 white and red size (and brightness). Also appearing sharper. Comparison was made also with the central peak of Alphonsus, no changes were observed. The significant part of the observation was the relative brightness of the central peak to the sunlit rim in white and red light, they appeared almost identical with the crater rim, being just slightly brighter. In blue light the brightness of the central peak was reduced by at least half while the rim brightness was not, (relative to one another). I strongly believe that this was a real event. The shadow filled portion of Tycho was examined for any abnormalities but none were observed. Observations were ended shortly after 3:14 U.T. due to clouds. I also conducted about 20 Moon blink observations during this observing run and got the same strong reaction each time." ALPO/BAA weight=3.
On 2001 Jun 29 at UT22:16-22:22 C. Brook (Plymouth, UK, 60mm refractor, x120, no spurious colour seen, seeing I) observed that the central peaks of Alphonsus looked bright at 22:16UT but had dimmed by 22:22UT. The three dark patches on the floor of Alphonsus were clearly seen. The ALPO/BAA weight=1.
On 2001 Jun 29 at UT 22:16-22:20 C. Brook (Plymouth, UK, seeing conditions very good, x120) reported that the central peak of Alphonsus was brighter than the central peak of Arzachel (or was it the other way around?). Cook observed 4 hours later from Washington DC, USA and found that on CCD images that the central peak of Alphonsus was only slightly less than that of Arzachel. The ALPO/BAA weight=2.
On 1968 Oct 01 at UT 21:00? Bartlett (Baltimore, MD, USA) and Beck (Ohio, USA, x437) observed lack of detail on the floor of Plato, however the wall of the crater was easily resolved. Cameron says that this was an independent confirmation. The Cameron 1978 catalog ID=1092 and weight=5. The ALPO/BAA weight=3.
Linne 1867 Mar 15 UT 20:00? Observed by Dawes (England?) "Excessively minute black dot in middle of feature. A geom. fig. boarded & centered with black that formed, dissolved & formed again" NASA catalog weight=3 (average). NASA catalog ID #150.
On 1964 Jun 21 at UT 03:43-05:44 Harris, Cross and Helland (Whittier, CA, USA, 19" reflector) observed south of Ross D: "Moving dark area". The Cameron 1978 catalog ID=819 and weight=4. The ALPO/BAA weight=4.
On 1964 Jun 21 at UT 21:18 Lipskii and Pospergelis (Shternberg State Ast. Institute, AZI-2" reflector (Cass.) observed Aristarchus: "Polarization meas. with electron polarimeter. Plane of polariz. rotated 2deg fr. the adjacent areas. They interpret it as some scattering medium over the crater. (Source gave date as 6/31/64, misprint =21st?)". The Cameron 1978 catalog ID=820 and weight=5. The ALPO/BAA weight=4.
On 1964 Jun 23 at UT 04:45-05:05 Bartlett (Baltimore, MD, USA, 5" reflector, x180, S=4-1 and T=3) observed a blue-violet glare on the north east rim and a strong violet tinge in the nimbus. The effect was absent 1 hour earlier. The Cameron 1978 catalog ID=821 and weight=4. The ALPO/BAA weight=2.
Moretus? 1871 Dec 25 UTC 22:00? Observed by Webb? (England?, 9" reflector?) "Internal twilight in crater #132- a large circular crater nr. S.pole (crater #132 on Goodacre's map is Plato. Webb's map?)" NASA catalog weight=3 (average). NASA catalog ID #173.
During an eclipse of the Moon the crater appeared normal until it emerged from the shadow. In the north east the dark floor was not its normal hue and two light areas appeared to join. The emerging patches became less and less bright, finally disappearing at 0345 UT when the crater returned to normal. Cameron 2006 catalog extension ID=10 and weight=2. ALPO/BAA weight=2.
Bright spot (4th magnitude) seen on eclipsed Moon and glimmering specks. Seen by nephew and neice of Beccaria. Cameron 1978 catalog weight=4. ALPO/BAA catalog weight=2.
On 1877 Aug 23/24 at UT 23:10-01:00 Airy, Pratt and Capron (Greenwich, England, France) observed during a lunar eclipse an unusual spectrum with strong absorption in yellow. (Airy) 2 patches of crimson light of short duration. Cameron says that this is a confirmation observation and that Airy was the Astronomer Royal. The cameron 1978 catalog ID=197 and weight=5. The ALPO/BAA weight=4.
Eratosthenes 1949 Oct 07 UT 04:14-05:22 W.Haas (USA) and O'Toole (USA) observed some changes in intensity of features inside this crater - after a lunar umbral passage. The effect lessened over time. Comparisons had been made with measured intensities on the previous and subsequent nights and on other months around the time of Full Moon. The ALPO/BAA weight=1.
On 1964 Dec 19 at UT 03:13-03:14 Budine and Farrell (Binghamton, New York, USA, 4" refractor, x200, S=7, T=5) observed that Aristarchus brightened five times over 1 minute during a lunar eclipse. The cameron 1978 catalog ID=870 and weight=5. The ALPO/BAA weight=3.
On 1964 Jun 25 at UT ~01:07 Rubens de Azevedo (Brazil) observed a white streak from Grimaldi on the limb, during an eclipse. The Cameron 1978 catalog ID=822 and weight=4. The ALPO/BAA weight=2.
On 1964 Jun 25 at UT ~01:07 Titulaer (Utrecht, the Netherlands) observed that Aristarchus crater was very bright during an eclipse. The Cameron 1978 catalog ID=822 and weight=4. The ALPO/BAA weight=1.
On 1905 at Feb 19 at UT 18:00-19:03 Moye (Montpelier, France) observed Aristarchus shining as a star in the dark, during a lunar eclipse. The Cameron 1978 catalog ID=320 and he weight=3. The ALPO/BAA weight=3. The ALPO/BAA weight=2.
On 1892 May 11 at 22:53UT an Unknown observer, during a partial eclipse noticed an extension of the Earth;s shadow beyond the north cusp. Cameron 1978 catalog ID=278 and weight=0. ALPO/BAA weight=1.
On 1892 May 11 at 22:53UT an Unknown observer, during a partial eclipse noticed an extension of the Earth's shadow beyond the south cusp. Cameron 1978 catalog ID=278 and weight=0. ALPO/BAA weight=1.
On 1898 Jan 08 at UT 00:00-01:00 Chrevremont (France?) notcied that during a lunar eclipse, the mid-eclipse shadow was so dark that details of the surface disappeared, all except for the Tycho SSW ray . Cameron comments that it is unsual for that ray to remain when usually the ones towards Kepler and Aristarchus are the ones to stand out? The Cameron 1978 catalog ID=297 and the weight=0. The ALPO/BAA weight=1.
On 1959 Mar 24 at UT 1851 Chernov (Russia) observed the follwing in Oceanus Procellarum during a lunar eclipse: "During penumbra of ecl. separate light pts. were sharply g?listing?. Possibly connected with transparancy of the penumbra. (time given was 0851 UT but must have been loc. time p.m. penum. phase started at 1756UT & umbral at 1916UT)". The cameron 1978 catalog ID=717 and weight=2. The ALPO/BAA weight=1.
Kepler 1962 Jul 17 UTC 06:24,08:36 Observed by Wildey, Pohn (Mt Wilson, CA, USA, 60" reflector+photometer) "Crater was at Vmag 2.68 at earlier obs. which was .47 mag brighter than av. mag. at 15d & it faded to near normal at later time to V=3.10(photom. measures), a change of 1/2 mag. or @1.5 times in brightness" NASA catalog weight=5 (very good). NASA catalog ID #761.
On 1968 Apr 13 at UT05:00-05:45 Cameron and Laczo (Greenbelt, MD, USA, 6" refractor, x50, 36" reflector x400, 12" reflector x80, seeing= excellent) observed for the folliwing craters: Aristarchus, Pytheas, Euler?, Censorinus, Plinius?, Proclus, Menelaus, Manilius: "Star-like pts. in the craters. Only Aris. identified certainly, rest fairly certain except Euler & Plinius. Seen in 6-in refr. at 50x but not in 36-in refl. at 400x where they were bright, but not star-lie pts. Seen later in 12-in refl. at 80x. In another bldg. Seen 1st @ 1/2h before totality ended, but not earlier dur. tot. tho't by author (WSC) to be geom. & instrumental = power effect". Chilton, K.E. reports in RASCJ that another observer did not report any of what the Greenbelt observers saw at all?The Cameron 1978 catalog ID=1065 and weight=4. The ALPO/BAA weight=1.
On 1975 Nov 18 at UT 19:38-23:34 Moore (Johannesburg, South Africa, 2" refractor, S=II), Peters (Kent, UK, 8.5" reflector, x120, S=IV), Good (Guilford, UK, binoculars), Foley (Dartford, Kent, UK, 12" reflector and photographs), and McKay (Kingston, England, UK, 6" reflector, x48) observed the following in Aristarchus during a lunar eclipse: "It appeared much fainter than ever before seen in ecl. by Moore. Fainter than Proc., Cop., & Tycho. Others rated brightness in order-- Hell, Stevinus, Furnerius, proc.; & Proc., Tycho, Hell, Aris. Photos confirmed dimness of it. For some observers it became invis. at S=II (good). Good ranked at least 4 other craters brighter than Aris. & that at 2035h it dimmed. Earthshine cond. extraordinarily good. Peters, at S=IV (fair?) rated Aris. brightest". At 23:50UT LeCroy Jr and Sr (Springfield, VA, 4.5" reflector, S=7) observed four glowing spots on the Moon during a lunar eclipse (including Aristarchus). At 23:50UT Aristarchus was an oval shape with no details seen. It had a ray extending from the south west rim (normal). The north rim was slightly blue and the south west rim very very slightly red. At 23:55UT it was clearing and details showed. At 00:02UT it was clear. Sketches were provided. Cameron comments that the colours fit Fitton's predictions on spectral dispersion in our atmosphere from atmospheric inversions. The brightness measued was 10+ and normal should be 9, and the plain is 4.5. The Moon's altitude at the LeCroy site was 45 deg. The Cameron 1978 catalog ID=1418-1420 and weight=5 (1-0 for LeCroy report). The ALPO/BAA weight=3.
On 1989 Aug 17 at UT 01:02-04:20 G. Kolvos (Thesaloniki, Greece, 4"reflector) measured (using photometry) that although there was a gradual fade over the Moon as the eclipse progressed, there was a 2"% rise in brightness of Aristarchus.Graphs were submitted and photos. A.C. Cook supplied CCD images and CCD photometry. A photograph by Conway (Sun Prarie, WI, USA) at the start of the eclipse reveal a bright colourless spot (aparently confirmed). The Cameron 2006 catalog ID=373 and weight=5. The ALPO/BAA weight=2.
In 1950 Apr 02 at UT 20:00 Chernov (Russia) observed two dark spots in Atlas during a penumbral phase of a lunar eclipse to quickly darken and become sharp in detail. The cameron 1978 catalog ID=524 and weight=1. The ALPO/BAA weight=1.
On 1979 Mar 13 (UT not given) an unknown observer (UK?) during a partial lunar eclipse observed an anomolous brightening in the umbra in the form of a large diamond shape between mare Serenitatis and the Moon's limb, just shortly after mid eclipse (UT 21:08).
Proclus 1938 Nov 08 UTC 20:00 Observed by Green (England? Seeing = good) "2 bright spots in Schmidt & Wilkins' craterlets. Was struck by whitish aspect of parts of floor -- possibly mists. S.wall concealed by these strong white patches, as if breached ring." NASA catalog weight=3 (average). NASA catalog ID #443.
Aristarchus & A 1965 Nov 10 UTC 01:25-01:57 Observed by Bartlett (Baltimore, MD, USA, 4" reflector, S=6, T=6) "Viol. tinge & radiance around nimbus; used red filter. Aris. A became larger." NASA catalog weight=4 (high). NASA catalog ID #913.
Mare Crisium 1962 Jul 18 UTC 09:54 Observed by Wildey & Pohn (Mt Wilson, CA, USA, 60" reflector + Photometer) "Photometric meas. showed change in brightness of the area of over a mag. during the nite. Recorded at Vmag=3.56 first, & a few min(?) later at 4.62. It was .95 mag. brighter (@2.5x) than av. for that age & then returned to normal." NASA catalog weight=5 (very high). NASA catalog ID #762.
Macrobius 1938 Nov 08 UTC 18:00? Observed by McLeod (England? 5" ? reflector) "Changes in dark areas. (near Proclus where Green saw phenomenom. see #443)" NASA catalog weight=2 (low). NASA catalog ID # 444.
On 1989 Feb 22 at UT03:48-03:58 D. Darling (Sun Praire, WI, USA, 3" refractor, x56, seeing=4/10 and transparency=4) found that the floor of Proclus was a "uniform grey" shade and the east wall was bright. The Cameron 2006 catalog ID=357 and the weight=2. The ALPO/BAA weight=1.
Mare Crisium 1962 Jul 19 UTC 07:30 Observed by Wildey & Pohn (Mt Wilson, CA, USA, 60" reflector + Photometer) "Photometric meas. showed change in brightness from Vmag=3.46 to V=3.07, where av. mag. for that age=3.26, or a brightening of .58 mag." NASA catalog weight=5 (very high). NASA catalog ID #763.
Mare Crisium 1962 Jul 19 UTC 09:48 Observed by Wildey & Pohn (Mt Wilson, CA, USA, 60" reflector + Photometer) "Photometric meas. showed change in brightness from Vmag=3.46 to V=3.07, where av. mag. for that age=3.26, or a brightening of .58 mag." NASA catalog weight=5 (very high). NASA catalog ID #763.
On 1984 Nov 10 at UT19:15-19:50 R. Moseley (Coventry, UK, the Moon's altitude was low) noticed that the region from the central peak and over and onto the east wall looked unusual. 8 bands were visible, "two on E. wall of c.p. strongest, surrounding collar grey increasing intensely outward. Band at 2 o'clock position was very dark. Bright spot on W. wall at 4 o'clock position." A sketch was made that illustrates bands on either side with bright patch. The Cameron 2006 catalog ID=252 and the weight=2. The ALPO/BAA weight=2.
Posidonius 1849 Feb 11 UT 02:00? Observed by Schmidt (Athens, Greece, 7" refractor) "Bright little crater in it was shadowless. Schroter saw repeated changes in it & others & once saw this crater's shadow replaced by a gray veil. Gruithuisen saw the same thing as Schroter in 1821." NASA catalog weight=4 (high). NASA catalog ID #128. ALPO/BAA weight=3.
On 2002 May 30 at UT02:30-02:44 C. Brook (Plymouth, UK) suspected that Aristarchus crater looked dimmer than normal. The ALPO/BAA weight=1.
Aristarchus 1975 Nov 18-19 UT 23:30-00:30? Observed by Foley (Kent, England, 12" reflector) "Deep blue-viol. spot in NW (IAU ?) interior corner. (seen occasionally with obscur. but dates not given)." NASA catalog weight=3 (average). NASA catalog ID #1421."
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.
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.