The Saturnian moon discovered in Voyager 1 images and named after the mythological figure is Pandora.
Voyager 1 photographed Pandora in 1980, and the moon received its official name from the International Astronomical Union. It is a small outer shepherd moon of Saturn’s narrow F Ring, orbiting near Prometheus, another moon whose name comes from Greek mythology.
Pandora’s irregular shape and low density are typical of many small outer Solar System moons. Its gravitational relationship with Prometheus helps influence the structure of Saturn’s F Ring, although Prometheus is generally considered the more prominent shepherd of the ring.
This astronomical Pandora is not connected to the fictional planet in the film Avatar. Astronomical naming follows mythological and literary traditions, while the Avatar setting uses Pandora as the name of a fictional moon orbiting a fictional planet.