Thursday, 7 October 2010

Ganymede's little shadow

Sorry for the delay, but no mirror = no posts (also no clear skies). My own "little" Schmidt-Cassegrain Telescope has had motor drive problems so not many pics from that either. However, I did manage to see Mercury and Uranus with it on 18th Sep at dawn from behind the sand dunes on the east coast. The picture I chose to post was taken that morning, when Ganymede started to cast a little shadow on the edge of Jupiter at about 4:20. The Canon was inserted directly into a 2x barlow lens on my 8" Meade SCT, creating an effective 4m focal length at f/20. A few raw-format subexposures at ISO 100 were stacked.

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