Elara (Moon)

b>Elara
bgcolor="#ffc0c0" colspan="2" | Discovery
align="left" | Discovered by C. D. Perrine
align="left" | Discovered on January 2 1905
bgcolor="#ffc0c0" colspan="2" | Orbital characteristics
align="left" | Mean radius 11,716,000 km
align="left" | Eccentricity 0.155-0.272
align="left" | Orbital period 259.1d
align="left" | Inclination 1.4-46.7°
align="left" | Is a satellite of Jupiter
bgcolor="#ffc0c0" colspan="2" | Physical characteristics
align="left" | Mean diameter 86 km
align="left" | Surface area km2
align="left" | Mass 8.7×1018 kg
align="left" | Mean density 2.6 g/cm3
align="left" | Surface gravity 0.031 m/s2
align="left" | Rotation period ~0.5d
align="left" | Axial tilt
align="left" | Albedo 0.03
align="left" | Surface temp. {| cellspacing="0" cellpadding="2" border="0"
min !! mean !! max
K K K }
align="left" | Atmospheric pressure 0 kPa
Elara (ee-lair'-a) is a moon of Jupiter. It was discovered by Charles Dillon Perrine at Lick Observatory in 1905 and is named after the mother by Zeus of the giant Tityus. Elara did not receive its present name until 1975; before then, it was simply known as Jupiter VII. It was sometimes called "Hera". It belongs to the Himalia group, five moons orbiting between 11 and 13 Gm from Jupiter at an inclination of about 27.5.

External links


... | Lysithea | 'Elara' | S/2000 J 11 | ...

 

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