On 1982 May 26 at UT 20:25-20:40 Kalauch (Berlin?, Germany, 9" refractor, x60, T=1(best) and scintilation=2) found Aristarhus to be "very visible" in Earthshine - which was very clear. At 20:25 UT Aristarchus was seen to blink irregularly and then it attained magnitude 7 (red). Telescopes and eyepieces were changed but did not effect the appearance. It disappered at 20:40UT. Cameron 2006 catalog ID=168 and weight=2. ALPO/BAA weight=2.
On 1982 May 27 at UT 17:05-17:35 E.V. Arsyukhin (Moscow, Russia, 3" reflector) found Endymion had a dark spot in the middle for about 30 min. The Cameron 2006 catalog ID=169 and weight=3. The ALPO/BAA weight=2.
On 1982 May 27 at UT 17:05-17:35 E.V. Arsyukhin (Moscow, Russia, 3" reflector) found Lacus Sominorum was very bright, misty and the colour varied. It was back to normal on the 28th and abnormal on 29-31st. - had a dark spot in the middle for about 30 min. The Cameron 2006 catalog ID=169 and weight=3. The ALPO/BAA weight=2.
On 1789 Sep 26 at UT 03:30 Schroter (Lillienthal, Germany) observed close beneath Mons Blanc at the west foot, in the dark, a small 5th magnitude, speck of light. Its round shadow was sometimes black, sometimes grey. Cameron suspects that this is the same as her TLP report No. 50. the Cameron 1978 catalog ID=62 and weight=4. The ALPO/BAA weight=3.
On 1981 Mar 12 at UT 19:25-20:30 Butler (of Brixton, UK, using a 10" reflector at 32-64x) noticed that Aristarchus was not visible, although the Earthshine was very obvious. Foley (of Kent, UK, and using 12" reflector) noticed that the crater was only just visible but Plato could definitely be seen. Cameron's 2006 TLP extension catalog ID=125 and weight=0. ALPO/BAA weight=2.
On 1789 Sep 26 at UT04:25? Schroter (Lillienthal, Germany) noted a bright point 26" north of Aristarchus crater. Note that the year might have been 1788? The Cameron 1978 catalog ID=50 and the weight=3. The ALPO/BAA weight=3.
On 1789 Sep 29 at UT04:25? Schroter (Lillienthal, Germany) noted 1'18.5" south east of plato was a whitish bright spot shining somewhat hazily, 4-5"in diameter and at 5th magnitude. He never saw this again. The spot became conspicuous at times and then disappeared. There was nothing else similar in Earthshine. Note that the year might have been 1788? The Cameron 1978 catalog ID=50 and the weight=3. The ALPO/BAA weight=3.
Schroter, from Lillenthal in Gemany, in 1789 (possibly it was 1788) Sep 26 UT 04:30 saw a small nebulous bright spot on the northern edge of Mare Crisium. Cameron 1978 catalog ID=50 and weight=3. ALPO/BAA weight=2.
Ptolemaeus 1866 Apr 22 UTC 20:00? Observed by Ingalls (Champion Hills, England, UK) "Crater on term., unusually smooth surf. seemed much diversified & gave impression, as at many other times that there was an obscuring medium". NASA catalog weight=3 (average). NADA catalog ID = 142. ALPO/BAA weight=3.
On 1953 Sep 16 UT03:00 R.M. Lippert (San Diego, CA, USA, 20cm Cassegrain reflector, x90)saw a bright magnitude 1 flash on the Moon, that was probably on the east rim of Werner(?) crater. It is unclear if the observer meant it was really magnitude 1, or was what a magnitude 1 star would have looked like. The flash was yellow-orange in colour. Observation described in the "Observations and Comments" column in the December, 1953 Strolling Astronomer (Vol. 7, No. 12), on page 170. The ALPO/BAA weight=3.
Pickering 1971 Jan 04 UTC 20:29-20:37 Observed by Collier (London, England) "Between Saunder and Rhaeticus, apparently coming from Pick. After 2027h it dimished with extraordinary swiftness, like a light goes out. (experienced observer)" NASA catalog weight=?. NASA catalog ID # 1281. Note that this crater was previously called E.C. Pickering before the IAU renamed some craters.
Alphonsus 1972 Sep 15 UTC 18:48-18:56 Observed by Hopp (13.25E, 52.5N, 75mm refractor) "Diffuse white to blue area within the crater - not sure" T=4, S=4. Ref: Hilbrecht & Kuveler Moon & Planets (1984) Vol 30, pp53-61.
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.
Piton 1958 Sep 23 UT 00:00? Observed by Moore? (UK?) "Enveloped in an obscuring cloud-like mist" NASA catalog ID 697. NASA catalog weight=2. ALPO/BAA weight=2.
Plato 1982 Jun 02 UT 22:00. 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. All the above seems normal, apart from the floor being brighter in the green filter. Cameron 2006 extension catalog ID 170 and weight=5. BAA/ALPO weight=3.
On 1965 May 12 at UT 19:10 E. Penzel (Rodewisch, East Germany) was taking a sequence of images during the impact of the Soviet Lunik 5. He detected a tens of km scale elongated cloud after the impact over a duration of 9.5 minutes. However there are differences between the images elsewhere on the Moon, possibly due to different exposures or some other effects and it is not 100% sure that what he detected was impact debris/cloud?. The ALPO/BAA weight=3.
Aristarchus 1976 Sep 05/06 UT 18:45-01:35 Observed by Prout (England?, 12" reflector, S=III-II), Foley (England, 12" reflector), Moore and Spry (Sussex, England, 12" reflector) "Viol. hue on crater on W. wall, especially NW corner seen by Prout & 2 Foleys. Moore & Spry did not see color. All obs. noted that the crater was dull
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.
Schroter's Valley 1897 Oct 08 UT 22:00 Observed by Pickering (Cambridge, Maas., USA, 15"? refractor) "Variations in vapor col. Tillsow, C was largest compared with D&E& most conspicuous 1.3 d after sunrise. Drawing. (time est. fr. given colon.)" NASA catalog weight=3 (average). NASA catalog ID #291.
Schickard 1940 May 20 UT 20:00 Observed by Moore (England, 12?" eflector) "Fog on floor -- milky appearance, less pronounced than on 8/2/39 (see #456)." NASA catalog ID #465. NASA catalog weight=4. ALPO/BAA weight=2.
On 1982 Jun 05 at 22:00? UT, Chapman (UK, using a 12" reflector), again using a x2 yellow filter, noticed that the central craterlet detectabilty changed such that sometimes it was visible and sometimes not. Foley (Kent, UK)noticed that the central craterlet could only just be seen between June 2 to June 5 and was much less discernable than during the previous lunation. No CED brightness measurements made. The floor of Plato was noted to be very dark though. Cameron 2006 catalog ID=172 and weight=4. ALPO/BAA weight=2.