Tarvos (moon)
From Wikipedia, the free encyclopedia
| Discovery [1] | |
|---|---|
| Discovered by | John J. Kavelaars et al. |
| Discovered | in 2000 |
| Mean Orbital elements [2] | |
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| Semi-major axis | 17.983 Gm |
| Eccentricity | 0.5305 |
| Inclination | 33.825° * |
| Orbital period | 926.2 d (2.63 yr) |
| Physical characteristics | |
| Mean diameter | 15 km[3] ** |
| Rotation period | ? |
| Albedo | 0.04 [3] assumed |
| Color | light red B-V=0.0.77 R-V=0.57[4] |
| Spectral type | ? |
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| *to the ecliptic | **based on the albedo |
Tarvos IPA: [ˈtarvɒs], or Saturn XXI, is a prograde irregular satellite of Saturn. It was discovered by John J. Kavelaars, et al. in 2000, and given the temporary designation S/2000 S 4. The name is Gaulish.
Tarvos orbits Saturn at an average distance of 18 million km in 926 days and is about 15 km in diameter (assuming an albedo of 0.04).
It is a member of the Gallic group of irregular satellites.
Sharing similar orbit and displaying similar light-red colour, Tarvos is thought to have its origin in a break-up of a common progenitor [5] [4] or to be a fragment of Albiorix[6].
[edit] External links
[edit] References
- ^ Discovery Circumstances (JPL)
- ^ Mean orbital parameters from JPL
- ^ a b Scott Sheppard pages
- ^ a b Grav, Tommy; Holman; B. Gladman; Aksnes, Kaare Photometric survey of the irregular satellites, Icarus, 166,(2003), pp. 33-45. Preprint
- ^ B. Gladman, P. Nicholson, Burns, JJ Kavelaars, Brian G. Marsden, Holman, Grav T. et al. Discovery of 12 satellites of Saturn exhibiting orbital clustering., Nature, 412 (2001), p. 163
- ^ Tommy Grav and James Bauer A deeper look at the colors of Saturnian irregular satellites, Preprint
- Ephemeris from IAU
... | S/2006 S 4 | Tarvos | Hyrokkin | ...
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Generally listed in increasing distance from Saturn
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| Ring shepherds | Pan · Daphnis · Atlas · Prometheus · S/2004 S 6? · S/2004 S 4? · S/2004 S 3? · Pandora |
| Co-orbitals | Epimetheus · Janus |
| Inner large and Trojan | Mimas · Methone · Pallene · Enceladus · Tethys (trojans Telesto, Calypso) · Dione (trojans Helene, Polydeuces) |
| Outer large | Rhea · Titan · Hyperion · Iapetus |
| Inuit group | Kiviuq · Ijiraq · Paaliaq · Siarnaq |
| Norse group | Phoebe · Skathi · Skoll · S/2004 S 13 · S/2006 S 4 · Hyrokkin · Mundilfari · S/2006 S 6 · S/2006 S 1 · S/2004 S 17 · Narvi · Bergelmir · Aegir · Suttungr · S/2004 S 12 · Bestla · Farbauti · Hati · S/2004 S 7 · Thrymr · S/2006 S 3 · Surtur · Kari · Fenrir · Ymir · Loge · Fornjot |
| Gallic group | Albiorix · Bebhionn · Erriapo · Tarvos |
