An Etymological Dictionary of Astronomy and Astrophysics

The outermost of Uranus’ large satellites and the second largest. It has a diameter of 523 km and orbits 583,420 km from its planet.
Compared to Uranus’ moons Ariel, Titania, and Miranda, Oberon is heavily cratered.
Like all of Uranus’ large moons, Oberon is composed of roughly half ice and half rock. Oberon was discovered by Herschel in 1787.

See also: Oberon is the King of the Fairies and husband of Titania in Shakespeare’s Midsummer-Night’s Dream.