Region of crater Plato and Vallis Alpes

Captured on the same night I obtained this detailed mosaic of the terminator of the waning half-moon. My goal, on this night of extremely good seeing, was to image the thin central rille running through Vallis Alpes. This being my second attempt, I have concluded that it should be observed with a rising, rather than a setting sun: a lot of the rille is in shadow. But a small segment can be faintly seen if you look carefully. A mosaic of two images stacked from the best 5% of 3,000 frame videos, captured at 1600x1200 resolution.

my back yard; September 26, 2013, 3-5:30 AM; seeing exceptionally good with average transparency. Celestron NI5 on 150mm Esprit with 2X Powermate; approx. 1/100 s exposures; no filters.



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