Erriapus (moon)

Irregular satellite
ref_discovery=Discovery Circumstances [http://ssd.jpl.nasa.gov/?sat_discovery (JPL)] ]

name=Erriapus - Saturn XXVIII
discoverer=John J. Kavelaars "et al."
discovery_date=in 2000
epoch=2000 Feb. 26.00
ref_orb_elems=Mean orbital parameters [http://ssd.jpl.nasa.gov/?sat_elem from JPL] ]
semimajor=17.343
eccentricity=0.4724
inclination=34.692
period=871.2 d (2.38 yr)
diameter=10 km [http://www.ifa.hawaii.edu/~sheppard/satellites/satsatdata.html Scott Sheppard pages] ]
albedo=0.04 "assumed"
color="light red" B-V=0.83 R-V=0.49Grav, T.; Holman, M. J.; Gladman, B. J.; Aksnes, K.; [http://arxiv.org/abs/astro-ph/0301016 "Photometric survey of the irregular satellites"] , Icarus, 166 (2003), pp. 33-45]

Erriapus (pronEng|ˌɛriˈæpəs "ERR-ee-AP-əs,"Fact|date=December 2007 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. [ [http://cfa-www.harvard.edu/iauc/07500/07539.html IAUC 7539: "S/2000 S 10"] 2000 December 7 (discovery)] [ [http://cfa-www.harvard.edu/mpec/K00/K00Y14.html 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)] It was named Erriapo in August 2003 [ [http://cfa-www.harvard.edu/iauc/08100/08177.html IAUC 8177: "Satellites of Jupiter, Saturn, Uranus"] 2003 August 8 (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. [ [http://astrogeology.usgs.gov/HotTopics/index.php?/archives/315-Spelling-of-Saturn-XXVIII.html USGS: Spelling of Saturn XXVIII] ]

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 groupGladman, 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.; [http://www.nature.com/nature/journal/v412/n6843/abs/412163a0.html "Discovery of 12 satellites of Saturn exhibiting orbital clustering"] , Nature, 412 (2001 July 12), pp. 163–166] or to be a fragment of AlbiorixGrav, T.; and Bauer, J.; [http://arxiv.org/abs/astro-ph/0611590 "A deeper look at the colors of Saturnian irregular satellites"] ] .

References

*Ephemeris [http://cfa-www.harvard.edu/iau/NatSats/NaturalSatellites.html from IAU-MPC NSES]

External links

* [http://www.ifa.hawaii.edu/~jewitt/irregulars.html David Jewitt pages]