QUOTE (volcanopele @ Oct 12 2005, 10:39 AM)
You wouldn't necessarily need another moon to eclipse Enceladus to get a good long exposure for plume searches. An eclipse by Saturn would do the trick.
Hmmm. I hadn't thought of that. Would an eclipse by Saturn completely darken Enceladus while leaving some of the space around it in bright sunlight? I'm thinking of Saturn's atmosphere; there's gotta be some "fuzzing" there.
Anyways, I went forward in time (on the Solar System Simulator) to see if it was possible to find a moon-moon eclipse just by searching for them around the time of solar ring-plane crossing. I did find one: Dione eclipses Enceladus on August 10th, 2009 at 07:58:00 UTC. The Simulator doesn't seem to render Dione's shadow on Enceladus; you have to select a view of Dione seen from Enceladus to see that it does indeed happen.
(On second thought, this eclipse stuff is kind of off topic for this thread. If anyone wants to follow this further, we ought to create a new thread for it.)