| Discovery | |||||||
|---|---|---|---|---|---|---|---|
| Discovered by | John J. Kavelaars, Brett J. Gladman, Matthew J. Holman, Jean-Marc Petit, and Hans Scholl | ||||||
| Discovered on | July 18, 1999 | ||||||
| Orbital characteristics | |||||||
| Mean radius | 17,418,000 km[1] | ||||||
| Eccentricity | 0.5914[1] | ||||||
| Orbital period | 2225.21 d | ||||||
| Inclination | 158° (to the ecliptic)[2] | ||||||
| Is a satellite of | Uranus | ||||||
| Physical characteristics | |||||||
| Mean diameter | ~48 km (estimate)[2] | ||||||
| Surface area | ~7,200 km² (estimate) | ||||||
| Volume | ~58,000 km³ (estimate) | ||||||
| Mass | ~7.5 × 1016 kg (estimate) | ||||||
| Mean density | ~1.3 g/cm³ (assumed) | ||||||
| Surface gravity | ~0.0063 m/s2 (estimate) | ||||||
| Escape velocity | ~0.0204 km/s (estimate) | ||||||
| Rotation period | ? | ||||||
| Axial tilt | ?° | ||||||
| Albedo | 0.04 (assumed)[2] | ||||||
| Surface temp. |
| ||||||
| Atmospheric pressure | 0 kP | ||||||
Setebos (pronounced /ˈsɛtɨbʌs/ SET-ə-bus) is one of the outermost retrograde irregular satellites of Uranus. It was discovered on 1999-07-18 by John J. Kavelaars et al. and provisionally designated S/1999 U 1.[3]
Confirmed as Uranus XIX it is named after the god worshipped by Caliban and Sycorax in William Shakespeare's play The Tempest.
The orbital parameters suggest that it may belong, together with Sycorax and Prospero to the same dynamic cluster, suggesting common origin.[4] However, this suggestion does not appear to be supported by the observed colours. The satellite appears neutral (grey) in the visible light (colour indices B-V=0.77, R-V=0.35),[5] similar to Prospero but different from Sycorax (which is light red).
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