Hati (moon)

Hati (/ˈhɑːti/ HAH-tee) or Saturn XLIII (provisional designation S/2004 S 14) 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 11, 2005.

Hati is about 6 kilometers in diameter, and orbits Saturn at an average distance of 20,303 Mm in 1080 days, at an inclination of 163° to the ecliptic (165° to Saturn's equator), in a retrograde direction and with an eccentricity of 0.291. In March 2013, the synodic rotational period was measured by the Cassini spacecraft to about 5.5 hours. This is the fastest known rotation of all moons in the solar system.

It was named in April 2007 after Hati, a giant wolf from Norse mythology, son of Fenrisúlfr and twin brother of Sköll.

References

• Scott Sheppard's Giant Planet Satellites Page (Saturn Satellite Data)
• Dave Jewitt: 12 new Satellites of Saturn May 3, 2005
• 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)
• Denk, T., Mottola, S. (2013): Irregular Saturnian Moon Lightcurves from Cassini-ISS Observations: Update. Abstract 406.08, DPS conference 2013, Denver (Colorado), October 10, 2013 (synodic rotation period)