Skathi (// SKAH-dhee), or Saturn XXVII, is a natural satellite of Saturn. It was discovered by Brett Gladman, Kavelaars and colleagues in 2000, and given the temporary designation S/2000 S 8. Skathi is about 8 kilometres in diameter and orbits Saturn at an average distance of 15.576 Gm in 725.784 days, at an inclination of 149° to the ecliptic (150° to Saturn's equator), in a retrograde direction and with an eccentricity of 0.246.
The name is given as Skadi by most sources. This is the name that was originally announced in 2003; however, the IAU Working Group on Planetary System Nomenclature (WGPSN) decided in early 2005 to use an alternative transliteration of the Norse spelling. The classical spelling is Skaði, with the letter Ð (eth), and the original form Skadi was a graphic approximation of that.
Skathi may have been formed from debris knocked off Phoebe by large impacts at some point in the Solar System's history.
- IAUC 7538: S/2000 S 7, S/2000 S 8, S/2000 S 9 7 December 2000 (discovery) Archived April 28, 2006, at the Wayback Machine.
- MPEC 2000-Y15: S/2000 S 1, S/2000 S 2, S/2000 S 7, S/2000 S 8, S/2000 S 9 19 December 2000 (discovery and ephemeris)
- IAUC 8177: Satellites of Jupiter, Saturn, Uranus 8 August 2003 (naming the moon) Archived July 9, 2008, at the Wayback Machine.
- IAUC 8471: Satellites of Saturn 21 January 2005 (naming the moon)