Setebos (moon)
| File:Uranus - Setebos image.jpg Discovery image of Setebos (encircled) | |
| Discovery | |
|---|---|
| Discovered by | |
| Discovery date | July 18, 1999 |
| Designations | |
Designation | Uranus XIX |
| Pronunciation | /ˈsɛtɛbʌs/,[1] /-bɒs/[2] |
| Adjectives | Setebosian /ˌsɛtɛˈboʊsiən/[3] |
| Orbital characteristics | |
Mean orbit radius | 17,418,000 km[4][5] |
| Eccentricity | 0.5914[5] |
| 2225.21 d | |
| Inclination | 158° (to the ecliptic)[4] |
| Satellite of | Uranus |
| Physical characteristics | |
| 47 km <50 km[6] | |
| 4.255 ± 0.017 h[6] | |
| Albedo | 0.04 (Assumed) >0,03 [6] |
| 23,3 | |
| 10,6 | |
Setebos /ˈsɛtɛbʌs/ also known as Uranus XIX is a one of the largest retrograde irregular satellite of Uranus
Discovery and Naming
[edit | edit source]It was discovered on 18 July 1999 by John J. Kavelaars et al. and provisionally designated S/1999 U 1.[7]
Confirmed as Uranus XIX, it is named after the god Setebos worshipped by Caliban and Sycorax in William Shakespeare's play The Tempest.
A crater on Umbriel is also named after Setebos, but with the spelling Setibos.
Orbit
[edit | edit source]Setebos orbits Uranus at an average distance of 16,256,000 km, in 1978 days, at an inclination of about 152° to the ecliptic, in a retrograde direction and with an high eccentricity of 0.445. The orbital elements are continuously changing due to solar and planetary perturbations.
Physical characteristics
[edit | edit source]Setebos estimated diameter is 47 kilometers, assuming an albedo of 4%.
The satellite appears neutral (grey) in visible light (colour indices B−V=0.77, R−V=0.35),[8] similar to Prospero.
Measurements of Setebos's light curve by the Kepler space telescope indicate that its rotation period is about 4 hours and 15,3min.[6] which makes it one of the fastest-rotating moons in our solar system.
Origin
[edit | edit source]Setebos probably did not form near Uranus but was captured by Uranus later. The orbital parameters suggest that it may belong to the same dynamic cluster as Sycorax and Prospero, suggesting a common origin.[9] However, Sycorax has a much redder color than the other moons, which tend to be gray in color.
See also
[edit | edit source]References
[edit | edit source]- ^ Shakespeare Recording Society (1995) The Tempest (audio CD)
- ^ Benjamin Smith (1903) The Century Dictionary and Cyclopedia
- ^ Campbell, Pyre, Weaver (1932) Poetry and criticism of the romantic movement
- ^ a b Sheppard, Jewitt & Kleyna 2005, p. 523, Table 3.
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ 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), pages 320–324
- ^ Grav, Holman & Fraser 2004.
- ^ Grav, Tommy; Holman, Matthew J.; Gladman, Brett J.; Aksnes, Kaare Photometric survey of the irregular satellites, Icarus, 166, (2003), pp. 33–45. Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
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External links
[edit | edit source]- Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). via Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
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- Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
