Fenrir (moon)

Fenrir (IPAEng|ˈfɛnrɪr "FEN-rirr)" or Saturn XLI (provisional designation S/2004 S 16) is a natural satellite of Saturn. Its discovery was announced by Scott S. Sheppard, David C. Jewitt, Jan Kleyna, and Brian G. Marsden on May 4, 2005, from observations taken between December 13, 2004, and March 5, 2005.

Fenrir is about 4 kilometres in diameter, and orbits Saturn at an average distance of 22,611 Mm in 1269.362 days, at an inclination of 163° to the ecliptic (143° to Saturn's equator), in a retrograde direction and with an eccentricity of 0.131.

It was named in April 2007 after Fenrisulfr, a giant wolf from Norse mythology, father of Hati and Skoll, son of Loki, destined to break its bonds for Ragnarök.

References

* [http://www.ifa.hawaii.edu/~sheppard/satellites/satsatdata.html Institute for Astronomy Saturn Satellite Data]
* [http://www.ifa.hawaii.edu/~jewitt/saturn2005.html Jewitt's New Satellites of Saturn page]
* [http://cfa-www.harvard.edu/iauc/08500/08523.html IAUC 8523: "New Satellites of Saturn"] May 4 2005 (discovery)
* [http://cfa-www.harvard.edu/mpec/K05/K05J13.html MPEC 2005-J13: "Twelve New Satellites of Saturn"] May 3 2005 (discovery and ephemeris)
* [http://cfa-www.harvard.edu/iauc/08800/08826.html IAUC 8826: "Satellites of Jupiter and Saturn"] (subscription-only) 2007 April 5 (naming the moon)

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