Hati_(moon)

Hati (moon)

Hati (moon)

Moon of Saturn

Hati /ˈhɑːti/ or Saturn XLIII is a natural satellite of Saturn. Its discovery was announced by Scott S. Sheppard, David C. Jewitt, Jan Kleyna, and Brian G. Marsden on 4 May 2005, from observations taken between 12 December 2004 and 11 March 2005.

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Hati is about 5 kilometers in diameter, and orbits Saturn at an average distance of 19,697 Mm in 1040 days, at an inclination of 164° to the ecliptic, in a retrograde direction and with an eccentricity of 0.375, somewhat similar to Mundilfari's orbit.[1] In March 2013, the synodic rotational period was measured by Cassini to about 5.45±0.04 hours. This is the fastest known rotation of all of Saturn's moons,[2] and in fact the fastest known among all moons (including asteroid moons) for which a rotation period has been reliably measured. Like Mundilfari, it is very elongated in shape.[3]

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

References

  1. [1]
    "Planetary Satellite Mean Elements". ssd.jpl.nasa.gov. Retrieved 2024-02-08.
  2. [2]
    Denk, T.; Mottola, S. (2019). Cassini Observations of Saturn's Irregular Moons (PDF). 50th Lunar and Planetary Science Conference. Lunar and Planetary Institute.
  3. [3]
    Denk, Tilmann; Mottola, Stefano; Tosi, Frederico; Bottke, William F.; Hamilton, Douglas P. (2018). "The Irregular Satellites of Saturn" (PDF). In Schenk, Paul M.; Clark, Roger N.; Howett, Carly J. A.; Verbiscer, Anne J.; Waite, J. Hunter (eds.). Enceladus and the Icy Moons of Saturn. Space Science Series. Vol. 322. Tucson, AZ: The University of Arizona Press. pp. 409–434. Bibcode:2018eims.book..409D. doi:10.2458/azu_uapress_9780816537075-ch020. ISBN 9780816537075.
  4. [4]
    Denk, Tilmann; Mottola, S. (2013-10-01). "Irregular Saturnian Moon Lightcurves from Cassini-ISS Observations: Update". p. 406.08. Bibcode:2013DPS....4540608D.
  5. [5]
    Abstract Book Correlating to the Online Bulletin of the American Astronomical Society (PDF). 45th Annual Meeting Division for Planetary Sciences. Vol. 45. American Astronomical Society. October 2013. p. 170.
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