During the final stage of satellite formation, multiple small satellites tend to form near the outer edge of the ring. (sciencedaily.com)
Make sure that the inner edge of your ring aligns with the outher edge of the printed circle. (onecklace.com)
During its dive, Cassini swooped to within 3,000 kilometers of the planet's atmosphere and 300 kilometers of the innermost edge of the rings at 124,000 kilometers per hour. (sciencenews.org)