Helike (moon)

Helike /ˈhɛlɪkiː/, also known as Jupiter XLV, is a moon of Jupiter. It was discovered by a team of astronomers from the University of Hawaii led by Scott S. Sheppard in 2003, and given the temporary designation S/2003 J 6.[5][6][7]

Helike
Discovery
Discovered byScott S. Sheppard
Discovery date2003
Designations
Designation
Jupiter XLV
Pronunciation/ˈhɛlɪkiː/[1][2]
Named after
Ἑλίκη Helicē
S/2003 J 6
AdjectivesHelikean /hɛlɪˈkiːən/[3]
Orbital characteristics [4]
21263000 km
Eccentricity0.156
−634.8 days
36.2°
Inclination154.8°
100.3°
314.7°
Satellite ofJupiter
GroupAnanke group
Physical characteristics
Mean diameter
4 km
22.6

    Helike is about 4 kilometres in diameter, and orbits Jupiter at an average distance of 20.54 million kilometres in 601.402 days, at an inclination of 155° to the ecliptic (156° to Jupiter's equator), in a retrograde direction and with an eccentricity of 0.1375. Its average orbital speed is 2.48 km/s.

    It was named in March 2005 after Helike, one of the nymphs that nurtured Zeus (Jupiter) in his infancy on Crete.[8]

    Helike belongs to the Ananke group.

    References
    1. "Helice". Oxford English Dictionary (3rd ed.). Oxford University Press. September 2005. (Subscription or UK public library membership required.)
    2. as 'Helice' in Noah Webster (1884) A Practical Dictionary of the English Language
    3. Hutchinson (1980) "Base Metal Sulfides", The Continental Crust and Its Mineral Deposits: The Proceedings of a Symposium Held in Honour of J. Tuzo Wilson, Held at Toronto, May 1979, p. 679
    4. S.S. Sheppard (2019), Moons of Jupiter, Carnegie Science, on line
    5. Daniel W. E. Green (March 4, 2003). "IAUC 8087: Satellites of Jupiter". International Astronomical Union.
    6. Brian G. Marsden (March 4, 2003). "MPEC 2003-E11 : S/2003 J 1, 2003 J 2, 2003 J 3, 2003 J 4, 2003 J 5, 2003 J 6, 2003 J 7". International Astronomical Union Minor Planet Center.
    7. Brian G. Marsden (March 7, 2003). "MPEC 2003-E29 : S/2003 J 9, 2003 J 10, 2003 J 11, 2003 J 12; S/2003 J 1, 2003 J 6". International Astronomical Union Minor Planet Center.
    8. Daniel W. E. Green (March 30, 2005). "IAUC 8502: Satellites of Jupiter". International Astronomical Union.


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