Brother Moons Saturns small moons Atlas, Prometheus s night side. It seems fitting that they should do so since in Greek mythology, their namesakes were brothers. Prometheus ( 86 km across) is just inside the F ring, while Epimetheus (113 km across) is farther, due right of Prometheus. Atlas (30 km across) is between the A and F rings almost right below Epimetheus and is very faint.
