Very cool. Now that is some serious dedication to capture an eclipse within a different planetary system. Makes our efforts to get a lunar eclipse here seem very tame by comparison. Sent from my iPad > On Jan 23, 2015, at 6:42 PM, Tom Polakis <tpolakis@xxxxxxx> wrote: > > As we pass through the orbital plane of Jupiter's moons, there are plenty of > mutual events, both occultations and eclipses. The deepest and most > favorable of these events occurred this morning, when Callisto's shadow > covered more than 80 percent of Ganymede. The geometry was such that the > distance between Callisto and Ganymede was 1.6 million miles at the time of > the eclipse. > > Seeing was very unsteady this morning, but I gave it a shot with the webcam > this morning. I used a 15-inch with a 2x Barlow lens, and further doubled > the scale in the post-processing. This time-lapse series runs 19 minutes, > and used a 1-minute interval between the finished frames. The shadow passed > north of (above) center, which is evident in the sequence. > > I'd complain more about the seeing conditions on this January night, but it > could be worse; we could be in Buffalo. > > http://www.pbase.com/polakis/image/158918439/original > > Tom > > > > > -- > See message header for info on list archives or unsubscribing, and please > send personal replies to the author, not the list. > -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.