IWLOP #116 - Gassendi

Nectarian Era, eroded crater with extensive system of rimae on its floor.

Location: 17.5 S 39.9 W    Origin: Impact/Tectonic     Size: 110 km     Rukl: 52     Type: Complex Crater (CC), Rille

Objects: Gassendi
Others Identified: Doppelmaier, Gassendi A, Gassendi B, Hippalus, Lee, Loewy, Rimae Mersenius, Rupes Liebig, Vitello 

Observation 1:
Location: Home

Date: 2020-03-05
Time: 8:44 PM ADT
Equipment: 10" Meade SCT
Eyepiece: Super 25mm wide angle Long eye relief

Magnification: x100
Seeing: Very Good (4) 
Transparency: Good (3)

Moon Phase: Waxing Gibbous (81.5%)

R1: Gassendi was easily found on the north shore of Mare Humorum. It appeared to have 3 central peaks. Gassendi A & B also visible. Crater A appeared to have a tall crater wall that created a large shadow on the floor whereas crater B appeared shallow by comparison.

C1: The rilles were in greater number on the west side and almost suggested 2 or 3 craters in the past with varying depths.

   

Observation 2:
Location: Home

Date: 2021-04-24
Time: 9:44 PM ADT
Equipment: 10" Meade SCT
Eyepiece: Explore Scientific 4.7mm with 82° FOV

Magnification: x530
Seeing: Good (3) 
Transparency: Good (3)

R1: Observed mini-craters on Gassendi's floor plus one on its west wall. Looked like the "time" was 4:40 PM. (Note: I didn't take the time to sketch this in detail.)

 

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