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Erriapus
Erriapus ( ; Latin: ''Erriapus, Erriappus''), also Saturn XXVIII (28), is a prograde irregular satellite of Saturn. It was discovered by Brett Gladman, John J. Kavelaars and colleagues in 2000, and given the temporary designation S/2000 S 10.〔(IAUC 7539: ''S/2000 S 10'' ) December 7, 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)〕 It was named Erriapo in August 2003〔(IAUC 8177: ''Satellites of Jupiter, Saturn, Uranus'' ) August 8, 2003 (naming the moon)〕 after Erriapus, a giant in Gaulish mythology; the name was changed from dative ''Erriapo'' to nominative ''Erriapus'' per IAU conventions in late 2007.〔(USGS: Spelling of Saturn XXVIII )〕〔(IAUC 9191: ''SATURN XXVIII (ERRIAPUS)'' ) January 11, 2011〕
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〔〔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〕 or to be a fragment of Albiorix.〔Grav, T.; and Bauer, J.; (''A deeper look at the colors of Saturnian irregular satellites'' )〕
== References ==
*Ephemeris (from IAU-MPC NSES )
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