Thyone (moon)

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Thyone
Thyone-discovery-CFHT-annotated.gif
Discovery images of Thyone by the Canada-France-Hawaii Telescope in December 2001
Discovery [1]
Discovered by Scott S. Sheppard et al.
Discovery site Mauna Kea Obs.
Discovery date11 December 2001
Designations
Designation
Jupiter XXIX
Pronunciation /θaɪˈoʊniː/ [2]
Named after
 Θυώνη Thyōnē
S/2001 J 2
Adjectives Thyonean /ˌθaɪəˈniːən/ [3]
Orbital characteristics   [4]
20940000 km
Eccentricity 0.229
−603.58 days [5]
26.6°
Inclination 148.5°
243.0°
89.1°
Satellite of Jupiter
Group Ananke group
Physical characteristics
Mean diameter
4 km
22.3

    Thyone /θaɪˈoʊniː/ , also known as Jupiter XXIX, is a retrograde irregular satellite of Jupiter. It was discovered by a team of astronomers from the University of Hawaii led by Scott S. Sheppard in 2001, and given the temporary designation S/2001 J 2. [6] [1]

    Thyone is about 4 kilometres in diameter, and orbits Jupiter at an average distance of 21,605,000 kilometres in 603.58 days, at an inclination of 147.28° to the ecliptic (146.93° to Jupiter's equator) with an eccentricity of 0.2526. Its average orbital speed is 2.43 km/s.

    It was named in August 2003 after Thyone, better known as Semele, mother of Dionysus in Greek mythology. [7]

    Thyone belongs to the Ananke group, retrograde irregular moons which orbit Jupiter between 19.3 and 22.7 million kilometres, at inclinations of roughly 150°.

    Thyone imaged by the CFHT on 10 December 2001, one day before its discovery Thyone-prediscovery-CFHT-annotated.gif
    Thyone imaged by the CFHT on 10 December 2001, one day before its discovery

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    References

    1. 1 2 MPEC 2002-J54: Eleven New Satellites of Jupiter 2002 May (discovery and ephemeris)
    2. ↑ Noah Webster (1884) A Practical Dictionary of the English Language
    3. ↑ E. R. Gregory (1989) Milton and the Muses, p. 50;
      Sidney Alexander (2016) The Complete Odes and Satires of Horace, p. 321
    4. ↑ S.S. Sheppard (2019), Moons of Jupiter, Carnegie Science, on line
    5. ↑ "M.P.C. 104798" (PDF). Minor Planet Circular. Minor Planet Center. 10 May 2017.
    6. ↑ IAUC 7900: Satellites of Jupiter 2002 May 16 (discovery)
    7. ↑ IAUC 8177: Satellites of Jupiter, Saturn, Uranus Archived 2008-07-09 at the Wayback Machine 2003 August (naming the moon)
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