Lysithea (moon)
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| Discovery | |||||||
|---|---|---|---|---|---|---|---|
| Discovered by | S. B. Nicholson | ||||||
| Discovered in | July 6, 1938 | ||||||
| Orbital characteristics | |||||||
| Mean radius | 11,653,230 km (0.07790 AU) | ||||||
| Eccentricity | 0.1132 | ||||||
| Periapsis | 10,334,100 km (0.069 AU) | ||||||
| Apoapsis | 12,972,300 km (0.087 AU) | ||||||
| Orbital period | 256.995 d (0.684 a) | ||||||
| Orbital circumference | 72,984,250 km (0.488 AU) | ||||||
| Orbital velocity | max: 3.695 km/s mean: 3.287 km/s min: 2.943 km/s |
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| Inclination | 27.78° (to the ecliptic) 25.77° (to Jupiter's equator) |
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| Is a satellite of | Jupiter | ||||||
| Physical characteristics | |||||||
| Mean diameter | 36 km | ||||||
| Surface area | ~4100 km2 | ||||||
| Volume | ~24,400 km3 | ||||||
| Mass | 6.3×1016 kg | ||||||
| Mean density | 2.6 g/cm3 | ||||||
| Surface gravity | ~0.013 m/s2 (0.001 g) | ||||||
| Escape velocity | ~0.022 km/s | ||||||
| Rotation period | ? | ||||||
| Axial tilt | ?° | ||||||
| Albedo | 0.04 | ||||||
| Surface temp. |
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| Atmospheric pressure | 0 kPa | ||||||
Lysithea (lye-sith'-ee-ə or lə-sith'-ee-ə, IPA: [laɪˈsɪθiə, ləˈsɪθiə]; Greek Λυσιθέα) is a prograde irregular satellite of Jupiter. It was discovered by Seth Barnes Nicholson in 1938 at Mount Wilson Observatory and is named after the mythological Lysithea, daughter of Oceanus and one of Zeus' lovers.
Lysithea did not receive its present name until 1975; before then, it was simply known as Jupiter X. It was sometimes called "Demeter".
It belongs to the Himalia group, five moons orbiting between 11 and 13 Gm from Jupiter at an inclination of about 27.5°.
[edit] External links
 edit Jupiter's natural 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: Pronunciation key | Rings of Jupiter |
