Mimas, Prometheus, and rings in motion

Here's an entry from the "just plain cool" department: an animation of 20 recent Cassini images, watching Mimas occult Prometheus as the shadowed face of the rings moves across the background. Cassini takes these "mutual event" movies mostly to refine the precision of orbital information of the various bodies. But I like to think that they also get just a little bit of priority because they look so cool.