Elara (moon)

Elara

Discovery
Discovered by	Charles Dillon Perrine[?]
Discovered in	1905
Orbital characteristics
Mean radius	11,716,000 km
Eccentricity	0.155-0.272
Orbital period	259.1d
Inclination	1.4-46.7°
Is a satellite of	Jupiter
Physical characteristics
Equatorial diameter	~86 km
Surface area	km2
Mass	8.7×1018 kg
Mean density	2.6 g/cm3
Surface gravity	0.031 m/s2
Rotation period	~0.5d
Axial tilt	?°
Albedo	0.03
Surface temp.	min mean max K K K
Atmospheric pressure	0 kPa

Elara (pronounced "EE lar uh") 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.