File:Stephano_-_Uranus_moon.jpg · Wikimedia Commons · See Wikimedia Commons
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
- Instance of
- moon of Uranus
- Parent body
- Uranus
- Radius
- 16
- Mass
- 25
- Orbital period
- 677.37
- Image
- Stephano - Uranus moon.jpg
Show 10 more facts
- discoverer or inventor
- Matthew J. Holman
- 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)
via Wikidata · CC0