Cassini Potato Pair

Pandora and Prometheus, the shepherding moons of the F ring, orbit inside and outside the thin ring.The elongated, potato-like shapes of the two moons are both visible here. Pandora (81 kilometers, 50 miles across) orbits outside the F ring and, with the inner shepherd moon Prometheus, helps to keep the narrow lanes of the F ring in check. The gravity of Prometheus (86 kilometers, 53 miles across