| Discovery | |
|---|---|
| Discovered by | Scott S. Sheppard |
| Discovery date | 2003 |
| Designations | |
Designation | Jupiter XLV |
| Pronunciation | /ˈhɛlɪkiː/[1][2] |
Named after | Ἑλίκη Helicē |
| S/2003 J 6 | |
| Adjectives | Helikean /hɛlɪˈkiːən/[3] |
| Orbital characteristics [4] | |
Semi-major axis | 21263000 km |
| Eccentricity | 0.156 |
| −634.8 days | |
| 36.2° | |
| Inclination | 154.8° |
| 100.3° | |
Argument of perihelion | 314.7° |
| Satellite of | Jupiter |
| Group | Ananke group |
| Physical characteristics | |
Mean diameter | 4 km |
Apparent magnitude | 22.6 |
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 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
- ^ "Helice". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
- ^ as 'Helice' in Noah Webster (1884) A Practical Dictionary of the English Language
- ^ 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
- ^ S.S. Sheppard (2019), Moons of Jupiter, Carnegie Science, on line
- ^ Daniel W. E. Green (March 4, 2003). "IAUC 8087: Satellites of Jupiter". International Astronomical Union.
- ^ 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.
- ^ 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.
- ^ Daniel W. E. Green (March 30, 2005). "IAUC 8502: Satellites of Jupiter". International Astronomical Union.