Europa

The satellite discovered by Charles Dillon Perrin in 1905

Ganymede (English: Elara) is surrounded by Jupiter Running one satellite 。 In 1905, it was Lick Observatory Discovered by Charles Dillon Perrin. In 1975, the International Astronomical Association named it Elara. stay MYTHOS In Chinese, Ilala is the mother of the giant Titias. She gave birth to the child with Gaia.

Chinese name: Europa
Foreign name: Elara

Classification: satellite
Discovery time: January 2, 1905

catalog

*Discovery

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Discoverer Charles Dillon Palin

*Track characteristics

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Eccentricity 0.1723

9670500 km (0.065 AU) near the wooden point

13695700 km (0.092 AU) away from the wooden point

Track period 257.984888 days (0.706 years)

72859500 km (0.487 AU) of track circumference

The fastest average revolution speed: 3.919 kilometers per second

Average: 3.269 kilometers per second

Slowest: 2.767 kilometers per second

The intersection angle between the track and the ecliptic is 29.20 °

Track and Jupiter Equatorial angle 30.66 °

Planet Jupiter

*Physical characteristics

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Average diameter: 86 km

The surface area is about 23200 square kilometers

The volume is about 333000 cubic kilometers

Mass 8.7 × 1017 kg

Average specific gravity 2.6 g/cm3

surface Gravitational acceleration About 0.031 meters per square second (0.003 grams)

Escape speed is about 0.052 kilometers per second

Rotation period is about 0.5 day (12 hours)

The inclination of rotation axis is unknown

Reflectance 0.04

Minimum average maximum surface temperature

Unknown Unknown About 124 Kelvin

Atmospheric pressure 0 Pascal

brief introduction

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Elara is a satellite orbiting Jupiter. In 1905, it was Lick Observatory Discovered by Charles Dillon Palin. In 1975, the International Astronomical Association named it Elara. In Greek mythology, Ilala is the mother of the giant Titias. She had the baby with Gaia.

other

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Ganymede is one of the members of Ganymede satellite group. This constellation includes five satellites orbiting Jupiter. They are within 11 to 13 million kilometers of Jupiter. The inclination of their rotation axis is about 27.5 degrees.

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