IWLOP #022 – Janssen
Large crater with a 140 km system of rilles on its floor.
Location: 44.9 S 41.0 E Origin: Impact Size: 250 km Rukl: 68, 67 Type: Simple Crater (CS)
Objects: Janssen, Lockyer
Others Identified: Fabricus, Janssen A, Metius, Rimae Janssen, Steinheil, Watt, Janssen craters T, D, F, S, E, R, M, J, C, X
Location: Home
Date: 2021-05-16
Time: 9:25 PM ADT
Equipment: 10" Meade SCT
Eyepiece: Explore Scientific 4.7mm with 82° FOV + x2 Barlow
Magnification: x1060
Seeing: Excellent (5)
Transparency: Very Good (4)
R1: There were several secondary craters on the Janssen floor. Fabricus interrupts its N-NE landscape and Lockyer interrupts it in the SW. The rim appears pockmarked with small craters.
C1: There was a rille from Fabricus that cut through the central peak, headed south and split east of Lockyer. There was a hint of a northern part that entered Fabricus and then passed between Fabricus and Janssen A, but not sure.
