Caliban (moon)

Caliban

Discovery image of Caliban
Discovery
Discovered by	Philip D. Nicholson Brett J. Gladman Joseph A. Burns John J. Kavelaars using the Hale telescope
Discovery date	September 6, 1997
Designations
Adjectives	Calibanian
Orbital characteristics
Mean orbit radius	7,231,000 km
Eccentricity	0.1812
Orbital period	579.73 d
Average orbital speed	0.91 km/s
Inclination	120.28° (to Uranus' equator) 140.878° (to the local Laplace plane) 139.89° (to the ecliptic)
Satellite of	Uranus
Physical characteristics
Mean radius	36 km (estimate)
Surface area	~16,000 km² (estimate)
Volume	~200,000 km³ (estimate)
Mass	~2.5×1017kg (estimate)
Mean density	~1.3 g/cm³ (assumed)
Rotation period	2.7h
Axial tilt	?
Albedo	0.04 (assumed)
Temperature	~65 K (estimate)

Caliban (/ˈkælᵻbæn/ KAL-i-ban or /ˈkælᵻbən/ KAL-ə-bən) is the second-largest retrograde irregular satellite of Uranus. It was discovered on 6 September 1997 by Brett J. Gladman, Philip D. Nicholson, Joseph A. Burns, and John J. Kavelaars using the 200-inch Hale telescope together with Sycorax and given the temporary designation S/1997 U 1.

Designated Uranus XVI, it was named after the monster character in William Shakespeare's play The Tempest.