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Photographer:

Ken Vaughan

Location of Photo:

Cattle Point, Victoria, BC, Canada

Date/Time of photo:

23 Dec 20

Equipment:

12" Meade LX200GPS, ZWO ASI178MM, Astronomik 642 filter

Description:

Another showpiece best viewed under glancing illumination, the Straight Wall is a fault. The land to the west has subsided about 300 m, creating a cliff. It's a very gentle slope in spite of appearances, having a grade of about 7%. The large crater to the upper-right of this image is Alpetragius (40 km). To the lower right of centre is Thebit (58 km) with it's diamond-on-the-ring Thebit A (20 km). The prominent crater just to the west of the Straight Wall is Birt (17 km), another diamond ring with Birt A (7km). You can see a rille to the northwest of Birt, Rima Birt (150 km X 1.5 km). The large crater cut off at lower right is Purbach (118 km).

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