Erriapus (pronounced /ˌɛriˈæpəs/, ERR-ee-AP-əs, 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[4][9] or to be a fragment of Albiorix[10].


1. ^ Discovery Circumstances (JPL)
2. ^ Mean orbital parameters from JPL
3. ^ a b Scott Sheppard pages
4. ^ a b Grav, T.; Holman, M. J.; Gladman, B. J.; Aksnes, K.; Photometric survey of the irregular satellites, Icarus, 166 (2003), pp. 33-45
5. ^ IAUC 7539: S/2000 S 10 December 7, 2000 (discovery)
6. ^ 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)
7. ^ IAUC 8177: Satellites of Jupiter, Saturn, Uranus August 8, 2003 (naming the moon)
8. ^ USGS: Spelling of Saturn XXVIII
9. ^ 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
10. ^ Grav, T.; and Bauer, J.; A deeper look at the colors of Saturnian irregular satellites

* Ephemeris from IAU-MPC NSES

External links

* David Jewitt pages

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