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 /θˈn/ [2]
Named after
Θυώνη Thyōnē
S/2001 J 2
Adjectives Thyonean /ˌθəˈnən/ [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
4 km
Spectral type
B–V = 0.71 ± 0.06, V–R = 0.45 ± 0.04 [6]
22.3

    Thyone /θˈn/ , 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. [7] [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. [8]

    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. Graykowski, Ariel; Jewitt, David (2018-04-05). "Colors and Shapes of the Irregular Planetary Satellites". The Astronomical Journal. 155 (4): 184. arXiv: 1803.01907 . doi: 10.3847/1538-3881/aab49b . ISSN   1538-3881.
    7. IAUC 7900: Satellites of Jupiter 2002 May 16 (discovery)
    8. IAUC 8177: Satellites of Jupiter, Saturn, Uranus Archived 2008-07-09 at the Wayback Machine 2003 August (naming the moon)