Himalia (moon)
Encyclopedia : H : HI : HIM : Himalia (moon)
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| Discovery | |||||||
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| Discovered by | C. D. Perrine | ||||||
| Discovered on | December 3, 1904 | ||||||
| Orbital characteristics | |||||||
| Mean radius | 11,432,430 km (0.07642 AU) | ||||||
| Eccentricity | 0.1443 | ||||||
| Periapsis | 9,782,900 km (0.065 AU) | ||||||
| Apoapsis | 13,082,000 km (0.087 AU) | ||||||
| Orbital period | 249.726 d (0.704 a) | ||||||
| Orbital circumference | 71,456,750 km (0.478 AU) | ||||||
| Orbital velocity | max: 3.850 km/s mean: 3.312 km/s min: 2.879 km/s | ||||||
| Inclination | 29.88° (to the ecliptic) 29.59° (to Jupiter's equator) | ||||||
| Is a satellite of | Jupiter | ||||||
| Physical characteristics | |||||||
| Mean diameter | 170 km | ||||||
| Surface area | ~90,800 km2 | ||||||
| Volume | ~2,570,000 km3 | ||||||
| Mass | kg | ||||||
| Mean density | 2.6 g/cm3 | ||||||
| Surface gravity | ~0.062 m/s2 (0.006 g) | ||||||
| Escape velocity | ~0.100 km/s | ||||||
| Rotation period | ~0.4 d (10 h) | ||||||
| Axial tilt | ?° | ||||||
| Albedo | 0.04 | ||||||
| Surface temp. |
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| Atmospheric pressure | 0 kPa | ||||||
On December 19, 2000, the Cassini spacecraft, en route to Saturn, captured a very low resolution image of Himalia, but it was too distant to show any surface details.
Himalia did not receive its present name until 1975; before then, it was simply known as Jupiter VI. It was sometimes called "Hestia".
It is the largest member of the group that bears its name, five moons orbiting between 11 and 13 Gm from Jupiter at an inclination of about 27.5°.
External links
- [Astronomical Journal, 24 (1905) 154B]
- [Astronomical Journal, 24 (1905) 160] (same as above)
- [Publications of the Astronomical Society of the Pacific, 17 (1905) 22]
- [Harvard College Observatory Bulletin, 173 (1905) 1]
- [Harvard College Observatory Bulletin, 175 (1905) 1]
- [Astronomische Nachrichten, 169 (1905) 43/44]
| [http://encycl.opentopia.com/ edit ] Jupiter (satellites) |
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| Inner satellites | Galilean moons | Themisto | Himalia group | Carpo |
| S/2003 J 12 | Ananke group | Carme group | Pasiphaë group | S/2003 J 2 |
| See also: | Rings of Jupiter |
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