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

Location: Home
Date: 2019-04-11
Time: 11:52 PM ADT
Equipment: 10" Meade SCT, 10 mm eyepiece
Magnification: x250
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.
R2: Horrocks was inside the N-NE wall. Halley was on the west wall whereas Hind and crater C were outside.

C1: I referred to the two buried craters as ghost craters (refer to R1)
Seeliger and Réaumur were beyond the terminator in darkness during this session.

NOTE: Also identified Pickering outside the wall near Horrocks.



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