Farbauti (pronounced /fɑrˈbaʊti/ far-BOW-tee) or Saturn XL (provisional designation S/2004 S 9) 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 12, 2004 and March 9, 2005.

Farbauti is about 5 kilometres in diameter, and orbits Saturn at an average distance of 20,291 Mm in 1079.099 days, at an inclination of 58° to the ecliptic (131° to Saturn's equator), in a retrograde direction and with an eccentricity of 0.209.

It was named in April 2007 after Fárbauti, a storm giant from Norse mythology, father of Loki.


* Institute for Astronomy Saturn Satellite Data
* Jewitt's New Satellites of Saturn page
* IAUC 8523: New Satellites of Saturn May 4, 2005 (discovery)
* MPEC 2005-J13: Twelve New Satellites of Saturn May 3, 2005 (discovery and ephemeris)
* IAUC 8826: Satellites of Jupiter and Saturn April 5, 2007 (naming the moon)

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