Carme (moon)
From Wikipedia, the free encyclopedia
|
Discovery
|
|
|---|---|
| Discovered by | S. B. Nicholson |
| Discovery date | July 30, 1938[1] |
| Mean orbit radius | 23.4 million km[2] |
| Eccentricity | 0.25[2] |
| Orbital period | 702.28 d (2.045 a)[2] |
| Average orbital speed | 2.253 km/s |
| Inclination | 164.91° (to the ecliptic) 167.53° (to Jupiter's equator)[2] |
| Satellite of | Jupiter |
|
Physical characteristics
|
|
| Mean radius | 23 km |
| Surface area | ~6600 km² |
| Volume | ~51,000 km³ |
| Mass | 1.3×1017 kg |
| Mean density | 2.6 g/cm³ (assumed) |
| Equatorial surface gravity | ~0.017 m/s2 (0.0017 g) |
| Escape velocity | ~0.028 km/s |
| Albedo | 0.04 (assumed) |
| Temperature | ~124 K |
Carme (kar'-mee, IPA: /ˈkɑrmi/; Greek Κάρμη) is a retrograde irregular satellite of Jupiter. It was discovered by Seth Barnes Nicholson at Mount Wilson Observatory in California in July 1938.[1] It is named after the mythological Carme, mother by Zeus of Britomartis, a Cretan goddess.
Carme did not receive its present name until 1975;[3] before then, it was simply known as Jupiter XI. It was sometimes called "Pan"[4] between 1955 and 1975. Note that Pan is now the name of a satellite of Saturn.
It gives its name to the Carme group, made up of irregular retrograde moons orbiting Jupiter at a distance ranging between 23 and 24 Gm and at an inclination of about 165°. Its orbital elements are as of January 2000.[2] They are continuously changing due to Solar and planetary perturbations.
[edit] See also
[edit] References
- ^ a b Nicholson, S. B. (1938). "Two New Satellites of Jupiter". Publications of the Astronomical Society of the Pacific 50: pp.292–293.
- ^ a b c d e Jacobson, R. A. (2000). "The Orbits of Outer Jovian Satellites". Astronomical Journal 120: pp.2679-2686. doi:.
- ^ IAUC 2846: Satellites of Jupiter 1974 October 7 (naming the moon)
- ^ Payne-Gaposchkin, Cecilia; Katherine Haramundanis (1970). Introduction to Astronomy. Englewood Cliffs, N.J.: Prentice-Hall. ISBN 0-134-78107-4.
[edit] External links
|
||||||||||||||||||||||||||||||||||||||||
