Saturn.
An average of 48 frames from a video taken with a SAC-IV QuickCam based CCD camera mounted on an 203.2mm f/6.3 Meade LX200 Schmidt-Cassegrain Telescope with a TeleVue 5x PowerMate at 1:51 AM on October 20, 2002 in Ellenville, NY. An averaged dark frame was subtracted from each of the frames and they were aligned and averaged using Keith's Image Staker on my 600MHz iBook. The notch on the lower right of the C ring is from a dust donut, the unfocused shadow of a speck of dust on one of the optical surfaces most likely the clear window in front of the CCD chip in my camera.