IWLOP #049 - Sacrobosco & Playfair
Sacrobosco is a pre-Nectarian crater and Playfair is Nectarian. The eroded Playfair G directly west of Playfair is pre-Nectarian since it is covered by deposits of probably Nectarian age. Sacrobosco and Playfair are located at widely separated longitudes so you may need to wait for the terminator to observe them both at the same time.
Location: 23.7 S 16.7 E Origin: Impact Size: 98 & 48 km Rukl: 56 Type: Complex Crater (CC
Objects: Playfair, Playfair G, Sacrobosco
Location: Home
Date: 2021-03-21
Time: 6:36 - 7:14 PM ADT
Equipment: 10" Meade SCT
Eyepiece: Explore Scientific 4.7mm with 82° FOV
Magnification: x530
Seeing: Very Good (4)
Transparency: Very Good (4)
R1: Playfair appears to be deeper than Sacrobosco and Playfair G. The latter 2 have rims that appear flatter and have been hit by objects to create numerous craters on their floors and rims. Sacrobosco's west rim is very terraced and has 3 craters on its smooth floor (A, B, C). The eastern crater floor appears darker on one side of the ridge compared to that of the western floor.
C1: The 2 craters in Playfair are in the NW quadrant. The 4 craters in Playfair G form a loose square around the centre point. Very tiny craters in all 6 cases. Also, it appears that Playfair was formed after Playfair G as Playfair changes the shape of G's rim.
