Stephano (moon)
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| Discovery | |||||||
|---|---|---|---|---|---|---|---|
| Discovered by | Brett J. Gladman, Matthew J. Holman, John J. Kavelaars, Jean-Marc Petit, and Hans Scholl |
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| 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. |
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| Atmospheric pressure | 0 kPa | ||||||
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]
Confirmed as Uranus XX, it is named after the drunken butler in William Shakespeare's play The Tempest.
[change] See also
[change] References
- ↑ 1.0 1.1 1.2 Scott S. Sheppard, David C. Jewitt, and Jan Kleyna An Ultradeep Survey for Irregular Satellites of Uranus: Limits to Completeness, The Astronomical Journal, 129 (2005), pages 518–525 . Preprint
- ↑ B. Gladman, JJ Kavelaars, Matthew J. Holman, J-M. Petit, H. Scholl, P. Nicholson, J. A. Burnse The Discovery of Uranus XIX, XX, and XXI, Icarus, 147 (2000), pp. 320–324
[change] Other websites
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| Moons | Ariel ·Belinda ·Bianca ·Caliban ·Cordelia ·Cressida ·Cupid ·Desdemona ·Ferdinand ·Francisco ·Juliet ·Mab ·Margaret ·Miranda · Oberon ·Ophelia ·Perdita ·Portia ·Prospero ·Puck ·Rosalind ·Setebos ·Stephano ·Sycorax ·Titania ·Trinculo ·Umbriel Other: Arieal features ·Miranda features ·Oberon features ·Titania features ·Puck Craters ·Umbriel craters · Miranda's Verona Rupes ·Umbriel Crater Wunda |
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| Characteristics | Atmosphere ·Rings of Uranus | |
| Discovery | William Herschel ·William Lassell | |
| Exploration | Voyager program ·Voyager 2 | |
| Other | 15 Orionis ·Uranus-crosser asteroid ·In fiction | |
