Erriapus (moon)
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| Discovery [1] | |
|---|---|
| Discovered by | John J. Kavelaars et al. |
| Discovered | in 2000 |
| Mean Orbital elements [2] | |
| Epoch 2000 Feb. 26.00 | |
| Semi-major axis | 17.343 Gm |
| Eccentricity | 0.4724 |
| Inclination | 34.692° * |
| Orbital period | 871.2 d (2.38 yr) |
| Physical characteristics | |
| Mean diameter | 10 km[3] ** |
| Rotation period | ? |
| Albedo | 0.04 [3] assumed |
| Color | light red B-V=0.83 R-V=0.49[4] |
| Spectral type | ? |
| *to the ecliptic **based on the albedo | |
Erriapus (pronounced /ˌɛriˈæpəs/ ERR-ee-AP-əs,[citation needed] or as Latin Erriapus, Erriappus), also Saturn XXVIII, is a prograde irregular satellite of Saturn. It was discovered by Brett Gladman, John J. Kavelaars, et al. in 2000, and given the temporary designation S/2000 S 10.[5][6] It was named Erriapo in August 2003[7] after Erriapus, a giant in Gaulish mythology; the name was changed from dative Erriapo to nominative Erriapus per IAU conventions in late 2007.[8]
Erriapus is about 10 kilometres in diameter, and orbits Saturn at an average distance of 17,3 Gm in 871 days.
Member of the Gallic group of irregular satellites, sharing a similar orbit and displaying a similar light-red colour, Erriapus is thought to have its origin in a break-up of a common progenitor of the group[9][4] or to be a fragment of Albiorix[10].
[edit] References
- ^ Discovery Circumstances (JPL)
- ^ Mean orbital parameters from JPL
- ^ a b Scott Sheppard pages
- ^ a b Grav, T.; Holman, M. J.; Gladman, B. J.; Aksnes, K.; Photometric survey of the irregular satellites, Icarus, 166 (2003), pp. 33-45
- ^ IAUC 7539: S/2000 S 10 2000 December 7 (discovery)
- ^ MPEC 2000-Y14: S/2000 S 3, S/2000 S 4, S/2000 S 5, S/2000 S 6, S/2000 S 10 2000 December 19 (discovery and ephemeris)
- ^ IAUC 8177: Satellites of Jupiter, Saturn, Uranus 2003 August 8 (naming the moon)
- ^ USGS: Spelling of Saturn XXVIII
- ^ 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 (2001 July 12), pp. 163–166
- ^ Grav, T.; and Bauer, J.; A deeper look at the colors of Saturnian irregular satellites
- Ephemeris from IAU-MPC NSES
[edit] External links
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