Erriapus (moon)

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Erriapus - Saturn XXVIII
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 (/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.[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][9]

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][10] or to be a fragment of Albiorix.[11]


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