IWLOP #039 – Catharina
Catharina is the oldest of the three features with 5 craters superimposed on it. Probably pre-Imbrian since elongated craters on its northeast rim are aligned with Mare Imbrium.
Location: 18.0 S 26-22 E Origin: Impact Size: 100 km Rukl: 57 Type: Complex Crater (CC)
Objects: Catharina; Catharina P, B & G; Catharina C, K, A, F, S & D
Others Identified: Tacitus, Polybius
Location: Home
Date: 2019-06-08
Time: 11:39 PM ADT
Equipment: 10" Meade SCT, 12 mm eyepiece with 92° FOV
Magnification: x416
Seeing: Very Good (4)
Transparency: Good (3)
SQM: 19.41
Temperature: 15° C - 10° C
Very light or no breeze. No clouds.
R1: Ghost crater Catharina P in north-northwest portion of the crater very shallow but slightly deeper than Catharina. The crater changed the shape of Catharina to look more like a small pear versus perfectly round.
C1: Craters B and G on the northeastern wall appeared to be very deep, their floor shadowed by their steep walls.
C2: Small craters within crater P appeared as pinpoints. Craters B, D, G, F and S were noted on or adjacent to Catharina's crater wall. Craters A, K, and C were adjacent to the crater in the SE. Also noted were crater A (maybe related to Tacitus?) and craters D, E and G were located in the W-NW.
