Wikipedia
Stephano (moon)
Stephano /ˈstɛfənoʊ/ is a retrograde irregular satellite of Uranus. It was discovered by Brett J. Gladman, et al. in 1999, and given the provisional designation S/1999 U 2.[7][8][9][10][11]
Discovery image of Stephano (encircled) | |
| Discovery | |
|---|---|
| Discovered by | |
| Discovery date | July 18, 1999 |
| Designations | |
Designation | Uranus XX |
| Pronunciation | /ˈstɛfənoʊ/[1][2] |
| Adjectives | Stephanonian /stɛfəˈnoʊniən/[3] |
| Orbital characteristics | |
Mean orbit radius | 8,004,000 km[4][5] |
| Eccentricity | 0.2292[5] |
| 677.37 d | |
| Inclination | 141.81° (to the ecliptic),144°[4] |
| Satellite of | Uranus |
| Physical characteristics | |
Mean radius | 16 km (estimate)[6] |
| ~3,000 km2 (estimate) | |
| Volume | ~20,000 km3 (estimate) |
| Mass | ~2.2×1016 kg (estimate) |
Mean density | ~1.3 g/cm3 (assumed) |
| ~0.0041 m/s2 (estimate) | |
| ~0.013 km/s (estimate) | |
| ? | |
| ? | |
| Albedo | 0.04 (assumed)[6] |
| Temperature | ~65 K (estimate) |
Confirmed as Uranus XX, it was named after the drunken butler in William Shakespeare's play The Tempest in August 2000.[12]
The orbital parameters suggest that it may belong to the same dynamic cluster as Caliban, suggesting common origin.[13]
Animation of Stephano's orbit around Uranus.
Uranus · Sycorax · Francisco · Caliban · Stephano · Trinculo
Uranus · Sycorax · Francisco · Caliban · Stephano · Trinculo
Animation of discovery images taken by the CFHT in July 1999
See also
References
- ^ Shakespeare Recording Society (1995) The Tempest (audio CD)
- ^ Benjamin Smith (1903) The Century Dictionary and Cyclopedia
- ^ Lessing (1914) How the Ancients Represented Death
- ^ a b Sheppard, Jewitt & Kleyna 2005, p. 523, Table 3.
- ^ a b Yeomans, Donald K. (2007-06-28). "Planetary Satellite Mean Orbital Parameters". JPL/NASA. Retrieved 2008-01-19.
- ^ a b Sheppard, Jewitt & Kleyna 2005, p. 523, Table 3 ... ri (km) ... 16 ... i Radius of satellite assuming a geometric albedo of 0.04.
- ^ Gladman, B. J.; Kavelaars, J. J.; Holman, M. J., Petit, J.-M.; Scholl, H.; Nicholson, P. D.; and Burns, J. A.; The Discovery of Uranus XIX, XX, and XXI, Icarus, 147 (2000), pp. 320–324
- ^ Marsden, Brian G.; Probable New Satellites of Uranus, IAUC 7230, 1999 July 27
- ^ Marsden, Brian G.; Probable New Satellites of Uranus, IAUC 7248, 1999 September 4
- ^ Marsden, Brian G.; S/1999 U 1, S/1999 U 2 and S/1999 U 3, IAUC 7385, 2000 March 24
- ^ Marsden, Brian G.; S/1999 U 2, IAUC 7473, 2000 August 5
- ^ Marsden, Brian G.; Satellites of Uranus, IAUC 7479, 2000 August 21
- ^ Grav, Tommy; Holman, Matthew J.; Gladman, Brett J.; and Aksnes, Kaare; Photometric survey of the irregular satellites,Icarus, 166 (2003), pp. 33-45. arXiv:astro-ph/0301016
External links
- by NASA's Solar System Exploration
- (by Scott S. Sheppard)
- MPC: Natural Satellites Ephemeris Service