Tarvos (moon)

Tarvos
Discovery
Discovered by	B. J. Gladman, J. J. Kavelaars, R. L. Allen, T. Rigg, C. W. Hergenrother, S. M. Larson, A. Doressoundiram and J. Romon^[1]^[2]
Designations
Alternative names	S/2000 S 4, Saturn XXI
Orbital characteristics^[3]
Epoch 2000 Feb. 26.00
Semi-major axis	17.983
Eccentricity	0.5305^[3]
Orbital period	926.2 d (2.63 yr)
Inclination	33.825
Physical characteristics
Dimensions	15 km^[4]
Albedo	0.04^[4] assumed
Spectral type	light red B−V=0.0.77, R−V=0.57^[5]

Tarvos (/ˈtɑːrvoʊs/ TAR-vəs), or Saturn XXI, is a prograde irregular satellite of Saturn. It was discovered by John J. Kavelaars et al. on September 23, 2000, and given the temporary designation S/2000 S 4. The name, given in August 2003, is after Tarvos, a deity depicted as a bull god carrying three cranes alongside its back from Gaulish mythology.^[6]

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 has the most eccentric orbit around Saturn.^[3]

It is a member of the Gallic group of irregular satellites.

With a similar orbit and displaying a similar light-red colour, Tarvos is thought to have its origin in the break-up of a common progenitor^[5]^[7] or to be a fragment of Albiorix.^[8]

References

↑ IAUC 7513: S/2000 S 3 and S/2000 S 4 October 25, 2000 (discovery)
↑ MPEC 2000-Y14: S/2000 S 3, S/2000 S 4, S/2000 S 5, S/2000 S 6, S/2000 S 10 December 19, 2000 (discovery and ephemeris)
1 2 3 Jacobson, R.A. (2007) SAT270, SAT271 (2007-06-28). "Planetary Satellite Mean Orbital Parameters". JPL/NASA. Retrieved 2008-01-19.
1 2 Scott Sheppard. "Saturn's Known Satellites". Department of Terrestrial Magnetism. Retrieved 2007-03-06.
1 2 Grav, Tommy; Holman, Matthew J.; Gladman, Brett J.; Aksnes, Kaare; Photometric survey of the irregular satellites, Icarus, 166 (2003), pp. 33–45
↑ IAUC 8177: Satellites of Jupiter, Saturn, Uranus August 8, 2003 (naming the moon)
↑ Gladman, B. J.; Nicholson, P. D.; Burns, J. A.; Kavelaars, J. J.; Marsden, B. G.; Holman, M. J.; Grav, T.; Hergenrother, C. W.; Petit, J.-M.; Jacobson, R. A.; and Gray, W. J.; Discovery of 12 satellites of Saturn exhibiting orbital clustering, Nature, 412 (July 12, 2001), pp. 163–166
↑ Grav, Tommy; and Bauer, J.; A deeper look at the colors of Saturnian irregular satellites

Ephemeris IAU-MPC NSES

External links

Saturn's Known Satellites (by Scott S. Sheppard)

Moons of Saturn

Generally listed in increasing distance from Saturn. Temporary names in italics.

Ring shepherds	S/2009 S 1 Propeller moonlets Pan Daphnis Atlas Prometheus ?(S/2004 S 6 S/2004 S 4 S/2004 S 3) Pandora

Co-orbitals	Epimetheus Janus

G Ring	Aegaeon

Inner large (with trojans)	Mimas Enceladus Tethys Telesto Calypso Dione Helene Polydeuces

Alkyonides	Methone Anthe Pallene

Outer large	Rhea Titan Hyperion Iapetus

Inuit group	Kiviuq Ijiraq Paaliaq Siarnaq Tarqeq

Gallic group	Albiorix Bebhionn Erriapus Tarvos

Norse group	Phoebe Skathi S/2007 S 2 Skoll S/2004 S 13 Greip Hyrrokkin Mundilfari Jarnsaxa 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/2007 S 3 S/2006 S 3 Surtur Kari Fenrir Ymir Loge Fornjot

Rings of Saturn Cassini–Huygens Themis Chiron In fiction

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