Callirrhoe (moon)
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Callirrhoe (kə-lirr'-oe-ee, IPA: /kəˈlɪrəʊi/; Greek Καλλιρρόη), or Jupiter XVII, is one of Jupiter's outermost named natural satellites. It was discovered by Spacewatch on October 6, 1999 and originally designated as an asteroid (1999 UX18).[1] It was discovered to be in orbit around Jupiter by Tim Spahr on July 18, 2000, and then given the designation S/1999 J 1.[2][3]
Callirrhoe is about 8.6 kilometers in diameter, and orbits Jupiter at an average distance of 24.356 million kilometers in 776.543 days, at an inclination of 141° to the ecliptic (140° to Jupiter's equator), in a retrograde direction and with an eccentricity of 0.264.
It was named in October 2002 after Callirhoe, daughter of the river god Achelous, one of Zeus' (Jupiter's) many conquests.[4]
It belongs to the Pasiphaë group, irregular retrograde moons orbiting Jupiter at distances ranging between 22.8 and 24.1 million kilometers, and with inclinations ranging between 144.5° and 158.3°.
As a navigation exercise, the New Horizons spacecraft imaged it on January 10, 2007.
[edit] References
- ^ MPS 7418 (Minor Planet Circulars Supplement); not available on-line
- ^ IAUC 7460: S/1999 J 1 2000 July 20 (discovery)
- ^ MPEC 2000-Y16: S/1975 J 1 = S/2000 J 1, S/1999 J 1 2000 December 19 (discovery and ephemeris)
- ^ IAUC 7998: Satellites of Jupiter 2002 October 22 (naming the moon)
[edit] External links
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