Stephano (moon)

Stephano is a retrograde non-spherical moon of Uranus. It was found by Brett J. Gladman, et al. in 1999, and given the designation S/1999 U 2.^[2]

Stephano

Discovery
Discovered by	Brett J. Gladman, Matthew J. Holman, John J. Kavelaars, Jean-Marc Petit, and Hans Scholl
Discovered in	July 18, 1999
Orbital characteristics
Mean radius	8,004,000 km
Eccentricity	0.2295
Orbital period	677.37 d
Inclination	141.81° (to the ecliptic)144°)[1]
Is a moon of	Uranus
Physical characteristics
Mean diameter	~32 km (estimate)[1]
Surface area	~3000 km² (estimate)
Volume	~20,000 km3 (estimate)
Mass	~6.0×1015 kg (estimate)
Mean density	~1.5 g/cm3 (estimate)
Surface gravity	~0.0041 m/s2 (estimate)
Escape velocity	~0.0090 km/s (estimate)
Rotation period	?
Axial tilt	?°
Albedo	0.04 (assumed)[1]
Surface temp.	min mean max ~64 K (estimate)
Atmospheric pressure	0 kPa

Confirmed as Uranus XX, it is named after the drunken butler in William Shakespeare's play The Tempest.

Related pages

• List of Uranus' moons