Setebos (moon)

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Setebos
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 17,501,000 km
Orbital eccentricity 0.5843
Orbital period 2234.77 d
Inclination 158° (to the ecliptic)[1]
Is a moon of Uranus
Physical characteristics
Mean diameter ~24 km (estimate)[1]
Surface area ~2,000 km² (estimate)
Volume ~7,000 km³ (estimate)
Mass ~2.1×1016 kg (estimate)
Mean density ~1.5 g/cm³ (estimate)
Surface gravity ~0.0063 m/s2 (estimate)
Escape velocity ~0.014 km/s (estimate)
Rotation period  ?
Axial tilt  ?°
Albedo 0.04 (assumed)[1]
Surface temp.
min mean max
~64 K (estimate)
Atmospheric pressure 0 kPa

Setebos is one of the farthest retrograde non-spherical moons of Uranus. It was found on 1999-07-18 by John J. Kavelaars et al. and designated S/1999 U 1.[2]

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.[3] However, this suggestion does not appear to be supported by the observed colours. The moon appears grey in the visible light,[4] similar to Prospero but different from Sycorax (which is light red).

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References[change | change source]

  1. 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
  2. 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
  3. Grav, Tommy; Holman, Matthew J.; Gladman, Brett J.; Aksnes, Kaare Photometric survey of the irregular satellites,Icarus, 166,(2003), pp. 33-45. Preprint
  4. Tommy Grav, Matthew J. Holman, and Wesley C. Fraser Photometry of Irregular Satellites of Uranus and Neptune,The Astrophysical Journal, 613, (2004), pp. L77–L80. Preprint
  1. Ephemeris (IUA)[1]
  2. ""Planetary Satellite Mean Orbital Parameters"". http://ssd.jpl.nasa.gov/?sat_elem. Retrieved October 26, 2007.

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