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Elara, Moon of Jupiter

Elara is a Moon that orbits round the planet Jupiter. Its orbit circumference, the total distance it travels round its planetary parent is 72,891,344.30 km. The furthest it gets from its orbital parent (apoasis) is 14,293,493 km. Its mass is estimated/calculated at being 869,227,691,196,372,000 kg. Its density has been calculated at being 2.6 g/cm3. Its volume is 333,038 km3. It was discovered in the year 1905 by Charles Dillon Perrine. Its orbital period, i.e. the period it takes to complete an orbit round Jupiter is 259.64 days. The figure is also known as the sidereel period. The figure comes from N.A.S.A..

The Semi-Major Axis of the orbit is 11,741,000 km, which is the furthest point from the centre to the edge of an elliptical point.

The mass of the object is calculated at being 869,227,691,196,372,000 kg. The equatorial circumference of Elara is 43.0 km. The mean radius of Elara is 43.0 (assuming an albedo of 0.04) km. The surface area of Elara is 23,235.22 km2. The surface gravity of the said item is 0.031 m/s2. The average orbit velocity, that is the speed at which it orbits is 11,697.5 km/h.

The orbital inclination, the angle at which Elara orbits in relation to the orbital plane is 26.627 degrees. The orbital eccentricity is 0.2174, it is the degree at which Elara orbits close to a circular (0) orbit as opposed to an elliptical (1) orbit.

Even though the moon is eighth largest, it is still only about 2% the size of Europa which is the smallest of the moons that Galileo discovered. It is believed to have been the remnants of an asteroid that was destroyed. Other moons such as Leda, Himalia and Lysithea are similar type moons and are believed to be all from the same asteroid if they were from an asteroid. Those four moons are referred to as Himalia moons, the name coming from the largest of the group.

Legend of Elara

The moon, the eighth largest Jovian moon is named after one of Zeus, the King of the Gods' lovers. Zeus is the Greek equivalent to the Roman god Jupiter. Elara became pregnant with Zeus' child and was hidden by Zeus in the underworld from Hera, Zeus's wife.

The name was chosen because it ended in the letter "a" which according to the International Astronomical Unions guidelines for Jovian moons, orbits in the same direction as Jupiter. Those moons that are retrograde end with the letter "e" such as Autonoe. NASA

Elara Facts


TypeMoon
Orbital Circumference72,891,344.30 km
Furthest from parent (Apoasis)14,293,493 km
Mass869,227,691,196,372,000 kg
Density2.6 g/cm3
Volume333,038 km3
Year of Discovery1905
DiscovererCharles Dillon Perrine
Orbital Period259.64
Semi-Major Axis11,741,000 km
Mass869,227,691,196,372,000 kg
Equatorial Circumference43.0 km
Mean Radius43.0 (assuming an albedo of 0.04) km
Surface Area23,235.22 km2
Surface Gravity0.031 m/s2
Average Orbit Velocity11,697.5 km/h
Orbital Inclination26.627
Orbital Eccentricity0.2174


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