Stephano (moon)
moon of Uranus From Wikipedia, the free encyclopedia
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]
| 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. |
| ||||||
| Atmospheric pressure | 0 kPa | ||||||
Confirmed as Uranus XX, it is named after the drunken butler in William Shakespeare's play The Tempest.
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