IWLOP #099 - Longomontanus

Very large prominent Nectarian Era crater in heavily impacted region.

Location: 49.5 S 21.7 W    Origin: Impact     Size: 145 km     Rukl: 72     Type: Simple Crater (CS)

Objects: Longomonatanus
Others Identified: Brown, Montanari

Location: Home
Date: 2021-03-22
Time: 9:58 PM ADT
Equipment: 10” Meade SCT
Eyepiece: Explore Scientific 4.7mm with 82° FOV
Magnification: x530
Seeing: Very Good (4)
Transparency: Good (3)
Temperature: 4° C
SQM: 18.59

R1: Longomontanus had several terraces in its walls with secondary impacts. Its peaks were slightly off-centre.
R2: There were secondary craters in its NW wall and floor, giving it a rough, craggy appearance.

Observation 2:
Location: Home
Date: 2021-03-23
Time: 10:47 PM ADT
Equipment: 10” Meade SCT
Eyepiece: Explore Scientific 4.7mm with 82° FOV
Magnification: x530
Seeing: Excellent (5)
Transparency: Excellent (5)

I viewed this crater under better transparency and seeing. The craters in the NW wall were more easily seen. I could make out several on the floor and up the crater wall.

 

 

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