An Etymological Dictionary of Astronomy and Astrophysics

The outermost of Saturn’s known satellites, also known as
Saturn IX. It is 220 km in diameter and orbits Saturn in 550.5 days at a distance of 12,952,000 km.

See also: In Gk. mythology, Phoebe is the daughter of Uranus and Gaia; grandmother of Apollo and Artemis.