This is a twin pair of craters in Mare Imbrium except that Le Verrier (crater on the right) has alot of debris around its rim whereas Helicon has a smooth appearance.

Acquisition Details:
Date: 06/05/2006
Exposure: 1/64 sec
Telescope: Celestron C8 with approx 2.5x Barlow
Mount: Vixen GP/DX
Camera: DMK 21F04