On 1982 Aug 01 at 00:00-01:00 K. Marshall (Medellin, Columbia, 12" reflector, seeing I-II) noted shading on the east floor of Plato that was apparently lighter than the rest of the floor and this was seen at both low and high magnifications. Foley notes that this was unusual. There were three craterlets visible on the floor - the central one was the brightest. Cameron 1978 catalog ID=178 and weight=3. ALPO/BAA weight=1.
Colour seen between Aristarchus and Herodotus by P. Moore and G. North. ALPO/BAA weight=3.
Lichtenberg 1966 Jun 02 UTC 03:05-03:35 Observed by Schneller (Cleveland, Ohio, 8" reflector, slit spectrascope) "Red glow on W. wall (Schnller thinks this is "normal" reddening at SR; however, these vary according to Ricker), (This rep't is the only positive one from alert sent out to observe for J.Green's tidal predictions, See list of neg. obs.)" NASA catalog weight=3 (average). NASA catalog ID #944
Aristarchus 1966 Jun 03 UT 01:00-01:45 Observed by Gordon (2), Delano (Ackerman, PR?, 5" reflector / Massachussets, 3" (x92) & 10" reflector T=4) "Deep blue color on N. wall. S.part of crater was brownish, (not on alert). Delano saw E.wall bright spot unusually bright, confirm, ?" NASA catalog weight=5. NASA catalog ID #947. ALPO/BAA weight=3.
On 1980 Aug 30? at UT 08:00? D. Louderback (South bend, WA, USA, 8" refletor x140) found the north wall to be very bright in red light (this is not normal as it is usually bright in blue - according to Cameron). The brightness was 9.7 (red) and 9 (blue no filter)compared to Eimmart's 8.7. Louderback thought that they observed an oranfe- yellow tinge. Cameron 2006 catalog ID=108 and weight=3.
Alphonsus 1958 Nov 03 UT 02:30-03:30 Observed by Kozyrev, Ezerski (Pulkova Observatory, Crimea, Ukraine, 50" reflector, 23A/mm spectrograph) UT03:00-03:30 "C.p. redder than rest; emiss. spect. in 4756A, 4100, 3950A (C3), 5165, 5130A (Swann bands) 3 spect. over 3.5 h. Image of c.p. weakened in viol. light on spect. Noted visual decrease in brightness & reddish glow. Decrease in bright, & unnusual white color(at 0300h- 0330h). Sudden decrease in vis. bright. Spect. started -- gave norm. Spect. (0330-0340h), conditions almost identical to Alter's on Oct. 26, 1956. Nothing seen on Nov. 2-3" NASA catalog weight=5. NASA catalog ID #703. ALPO/BAA weight=5.
On 1982 Aug 11 at UT03:30-04:15 Mobberley (Suffolk, UK) obtained a photograph and made a sketch that revealed a needle-like shadow from the west wall to near by the central craterlet - the latter was quite clearly visible. What were not visible were the other four craterlets. The Cameron 2006 catalog ID=183 and weight=4. The ALPO/BAA weight=2.
On 1969 May 20 at UT 03:18-04:27 Cross (Las Cruces, NM, USA 6" refractor), Olivarez (Spain?), Kohlenberger, Gibson, Miller, Duarte and Harris (CA, USA) observed brightenings, pulsations, scintillations in Aristarchus crater. Cameron says independent confirmation seen by 4 observers, 1-2 magnitude increases, ranged between 1-30sec. Most active period was 03:18-03:20UT, 04:17-04:27UT (Las Cruces). Calkins (West Covins, CA, USA) UT 03:40-04:25 saw one major brightening up 2 magnitudes above steady state lasting 0.2 to 1.5 sec and another slow brightening lasting 5-10 seconds. Kelsey (CA, USA) saw at 03:43-03:48UT some brightenings. These observations were made during the Apollo 10 watch. The Cameron 1978 catalog ID=1127 and 1128 and weight=5. The ALPO/BAA weight=4.
Plato 1966 Jun 27 UT 21:40-21:55 Observed by Robinson (Teignmouth, England, 10.5" reflector) and Sartory (England, 8.5" reflector + Moon blink) "Color (red?) on SE wall detected by Eng. moon blink sys. (confirm)." NASA catalog weight=5 (very high). NASA catalog ID 949.
On 1983 Jul 21 at UT 21:02-23:18 P.W. Foley (Kent, UK, 12" reflector, seeing=III) found the region around the cleft on the souther rim to be out of focus - however atmospheric conditions were turbulent until 23:18UT. An unsual dark triangular region (long base against rim) was seen to extend from the inner rim at 12 o'clock onto the floor for 13- 16km. The crater had lots of detail elsewhere. M. Cook (Frimley, UK) found the south east to soth west to be obscured again, but not as badly as she had seen on the 20th July. J. Cook (Frimley, UK) found the dark region had 2 white bands on the side and the south west wall was blurred like it was on the 20th July - this time tough colour was not present. There were also two light patches on the floor. Mosely (Coventry, UK) observed the south wall at x120 and found the wall out of focus at the 11 o'clock location. Through a yellow filter he saw a "white mistiness: on the top of the southern rim and only the south east cleft could be seen (no colour). By 22:40-23:00 the effect had cleared up. No dark triangular patch was seen. When Marshall (Surrey, UK) observed (22:30-03:00) nothing unsual was seen, though a sketch provided shows a light patch on the floor located at 11 o'clock. All observations, made by all observers had some atmospheric turbulence, however trsnparency was good. The Cameron 2006 catalog ID=225 and the weight=5. The ALPO/BAA weight=3.