Skathi (moon)

Skathi /ˈskɑːði/, 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.[4][5] 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. Its rotation period is 11.1±0.02 hours.[3]

Skathi
Discovery images of Skathi (circled) taken by the CFHT in September 2000
Discovery
Discovery date2000
Designations
Designation
Saturn XXVII
Pronunciation/ˈskɑːði/[1]
Skaði
S/2000 S 8
Orbital characteristics [2]
15541000 km
Eccentricity0.270
−728.2 days
Inclination152.6°
Satellite ofSaturn
GroupNorse group
Physical characteristics
Mean diameter
8+50%
−30% km[3]
11.10±0.02 h[3]
23.6

    Skathi may have been formed from debris knocked off Phoebe by large impacts at some point in the Solar System's history.

    Name

    The name comes from Norse mythology, where Skaði is a giantess and the wife of the Vanir god Niord. The name of the moon was given as Skadi by early sources, with a ⟨d⟩ as a graphical approximation of the Icelandic letter ⟨ð⟩ eth. That was the spelling that had been announced in 2003;[6] however, the IAU Working Group on Planetary System Nomenclature (WGPSN) decided in early 2005 to instead use the transliteration ⟨th⟩.[7] The adjectival form "Skathian" is found in fiction.[8]

    References
    1. Merriam-Webster's Encyclopedia of Literature (1995).
      The 'a' vowel is actually transcribed as [a], a non-English vowel between English /æ/ and /ɑː/. The latter is consistent with other Old Norse names in English such as Vanir ("Vanir". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)).
    2. S.S. Sheppard (2019), Moons of Saturn, Carnegie Science, on line
    3. Denk, T.; Mottola, S. (2019). Cassini Observations of Saturn's Irregular Moons (PDF). 50th Lunar and Planetary Science Conference. Lunar and Planetary Institute.
    4. 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
    5. 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)
    6. IAUC 8177: Satellites of Jupiter, Saturn, Uranus 8 August 2003 (naming the moon) Archived July 9, 2008, at the Wayback Machine
    7. IAUC 8471: Satellites of Saturn 21 January 2005 (naming the moon)
    8. Cole (2010) Kresley Cole Immortals After Dark: The Clan MacRieve
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