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.
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.
Aristarchus 1978 Oct 23 UT 06:30-06:34 V.A. Sage (Bristol, UK, 10.25" reflector, x250, Wratten 44a and 25, seeing II) noted that Aristarchus was surrounded by a dark area in the blue filter. They did not regard this as a TLP at the time. However because Aristarchus is surrounded by blue material in real life, this should have been brighter? For this reason, despite the observer regarding this as a negative TLP, an ALPO/BAA weight=1 has been applied.
On 1991 Apr 17 at UT 01:22-02:37 D. Spain (Fairdale, KY, USA, 3.5" refractor, x30-x111, S=5/10, T=5.5) observed (UT01:22-02:25) an orange flare and some brighenings in the crater Gassendi. With the naked eye he saw a glowing spot on the Earthshine side of the Moon. When he turned his telescope onto this he found out that this was Gassendi crater. By comparison, Aristarchus was just a small point. Herzog (Racine, WI, USA, 2.5" refractor, x28, S=G and T=6-7) confirmed Spain's observation UT 01:51-02:37?. Darling (Sun Praire, WI, USA, 3" refractor, x56, S=7/10, T=5) did not see anything unusual UT 02:15- 02:32?. Cameron speculates that the orange colour might be from the Moon's low altitude. The Cameron 2006 catalog ID=421 and the weight=1. The ALPO/BAA weight=1.