Hadley Rille

Combination of 2000, 0.002 second exposures.
DMK video CCD. 20" f/6.8 Dall-Kirkham cassegrain telescope at prime focus.

Hadley Rille is located on the eastern edge of Mare Imbrium, close to the lunar Apennines. Not an easy feature to observe, it is best observed a couple of days after first quarter.