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Stephano (moon)




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Stephano
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.
min mean max
~64 K (estimate)
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.

Other pages

References

  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
  1. Ephemeris IAU-NSES
  2. Mean orbital parameters NASA JPL

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