Studies of early intense cratering and possible saturation effects.

Crater counts on Rhea were completed, to be compared and combined with independent counts by Steve Squyres; the material is now being integrated into a study of cratering on Rhea and other Saturn satellites by Squyres, Lissauer, and Hartmann. Special attention is being paid to lighting and other effects on the apparent changes in crater density from one region to another. An earlier proposal by the author on crater density was further tested. Brief preliminary results are given.