Stephano

Also known as Uranus XX, S/1999 U 2

moon of Uranus

Key facts

Discovered by: John J. Kavelaars Brett J. Gladman Matthew J. Holman Jean-Marc Petit Hans Scholl
Discovery date: July 18, 1999
Designation: Uranus XX
Pronunciation: / ˈ s t ɛ f ən oʊ / STEF -ən-oh
Adjectives: Stephanonian / ˌ s t ɛ f ə ˈ n oʊ n i ə n / STEF -ə- NOH -nee-ən
Mean orbit radius: 7 951 400 km
Orbital period sidereal: 677 d
Inclination: 143.6° (to the ecliptic )
Satellite of: Uranus
Group: Caliban group
Mean radius: 16 km (estimate)
Surface area: ~3200 km (estimate)
Volume: ~17 000 km (estimate)
Mass: ~ 2.2 × 10 kg (estimate)
Mean density: ~1.3 g/cm (assumed)
Surface gravity: ~0.006 m/s (estimate)
Escape velocity: ~0.014 km/s (estimate)
Synodic rotation period: ?

via Wikipedia infobox

Wikidata facts

Radius: 16
Mass: 25
Orbital period: 677.37
Image: Stephano - Uranus moon.jpg

Show 9 more facts

provisional designation: S/1999 U 2
time of discovery or invention: 1999-07-18
orbital eccentricity: 0.2292
semi-major axis of an orbit: 8004000
orbital inclination: 141.81
volume as quantity: 20000
albedo: 0.040
temperature: 64
Commons category: Stephano (moon)

Sources (4)

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Article

Stephano (/ˈstɛfənoʊ/ STEF-ən-oh) is a retrograde irregular satellite of Uranus. It was discovered by Brett J. Gladman, et al. in 1999, and given the provisional designation S/1999 U 2.

Confirmed as Uranus XX, it was named after the drunken butler in William Shakespeare's play The Tempest in August 2000.