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Discovered by John J. Kavelaars et al.
Orbital characteristics
Epoch 2000 Feb. 26.00
Eccentricity 0.4724
871.2 d
(2.38 yr)
Inclination 34.692
Physical characteristics
Dimensions 10 km[1]
Albedo 0.04 (assumed)[1]
Spectral type
light red
B−V=0.83, R−V=0.49[2]

Erriapus (/ˌɛriˈæpəs/ ERR-ee-AP-əs; Latin: Erriapus, Erriappus), also Saturn XXVIII (28), 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.[3][4] It was named Erriapo in August 2003[5] after Erriapus, a giant in Gaulish mythology; the name was changed from dative Erriapo to nominative Erriapus per IAU conventions in late 2007.[6][7]

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[2][8] or to be a fragment of Albiorix.[9]


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