Prometheus

Wikipedia: Prometheus (moon) - Wikipedia
Discovered by S.Collins and others in 1980, from Voyager 1 photographs

Named after one of the sons of Uranus and Gaea

Orbital size 139,353 km (about 86,600 miles) (just inside the F ring)

Orbital eccentricity 0%

Orbital inclination 0 degrees

Orbital period 14.7 hours

Diameter about 150 x 100 x 70 km (about 92 x 62 x 42 miles) (very elongated)

Mass, density and surface gravity all very uncertain

Albedo (reflectivity) 60%

Inner of two shepherd moons (outer is Pandora) which control Saturn's F ring