Prometheus shares shepherding duties with Pandora around Saturn’s F ring. These two small moons orbit on opposite sides of the narrow ring and exert gravitational effects that help confine and shape it.
Prometheus is the inner shepherd moon, while Pandora is the outer shepherd moon. Their repeated gravitational interactions contribute to the F ring’s braided, kinked, and sometimes changing appearance. The ring is especially dynamic compared with many broader, more uniform-looking planetary rings.
Both moons were discovered in Voyager-era imagery and were named after figures from Greek mythology. Prometheus is the Titan associated with giving fire to humanity, while Pandora is the woman whose jar releases evils into the world. Their mythological names are unrelated to their scientific roles, but both satellites became important examples of how small moons can organize ring material.