IWLOP #065 - Hipparchus
A pre-Nectarian crater with badly disintegrated walls and square-like shape, perhaps due to pre-existing faults.
Location: 5.5 S 4.8 E Origin: Impact Size: 150 km Rukl: 44, 45 Type: Complex Crater (CC)
Objects: Hipparchus, Horrocks, Halley, Hind
Others Identified: Airy, Argelander, Pickering, Vogel
Time: 11:52 PM ADT
Equipment: 10" Meade SCT, 10 mm eyepiece
Seeing: Very Good (4)
Transparency: Excellent (5)
R1: Hipparchus had a smooth floor except for what appears to be two ghost craters plus craters N and X. Crater N was central on the floor whereas crater X looks to have impacted the wall.
C1: I referred to the two buried craters as ghost craters (refer to R1)
NOTE: Also identified Pickering outside the wall near Horrocks.