NASA Cassini Image: F Ring (and Prometheus?)
Editor's note: I was wandering through Cassini's raw image collection last night and came across this peculiar image. According to the official description this image was "taken on October 29, 2004. The camera was pointing toward Saturn's rings at approximately 790,933 kilometers away." Just inside the ring there appears to be a small moon passing by. If you look at the enlarged version of this image you can see what appears to be disturbances in the ring which seem to be a direct result of the moon (Prometheus?) passing nearby. I have sent a request. Perhaps someone at JPL will tell us what we are looking at.