Wunda (Umbriel)

Australian dark spirit.

Wunda is a large crater on the surface of Uranus' moon Umbriel. Wunda has a prominent albedo feature on its floor, which takes the shape of a ring of bright material at least 10 km in radial width. The reason for its brightness, which stands out from the very dark composition of the moon as a whole, is unknown. (wikipedia entry)

A crater is a circular depression likely created by an impact event. On Umbriel they are named after dark spirits (individual).