Helike (moon)
Helike (/ˈhɛlɪki/ HEL-i-kee; Greek: Ελίκη), 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.[1][2][3]
Discovery | |
---|---|
Discovered by | Scott S. Sheppard |
Discovery date | 2003 |
Orbital characteristics | |
Mean orbit radius | 20.5 million km |
601.402 days | |
Physical characteristics | |
Mean radius | ~2 km |
|
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.[4]
Helike belongs to the Ananke group.
References
- ↑ 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.
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