Adrastea is a Moon that orbits round the planet Jupiter. Its orbit circumference, the total distance it travels round its planetary parent is 810,530.25 km. The furthest it gets from its orbital parent (apoasis) is 129,232 km. Its mass is estimated/calculated at being 7,493,342,165,485,970 kg. Its density has been calculated at being 3 g/cm3. Its volume is 2,310 km3.
It was discovered in the year 1979 by D. Jewitt,.
The orbital period, i.e. the period it takes to complete an orbit round Jupiter is 0.298 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 129,000 km, which is the furthest point from the centre to the edge of an elliptical point.
The equatorial circumference of Adrastea is 51.5 km. The mean radius, that is the average radius of Adrastea is 8.2 km. The surface area of Adrastea is 844.96 km2. The surface gravity of the said item is 0.007 m/s2. The average orbit velocity, that is the speed at which it orbits is 113,329.2 km/h.
The orbital inclination, the angle at which Adrastea orbits in relation to the orbital plane is 0.054 degrees. The orbital eccentricity is 0.0018, it is the degree at which Adrastea orbits close to a circular (0) orbit as opposed to an elliptical (1) orbit.
Adrastea is the smallest of the four inner Jovian moons. The others being Metis, Amalthea and Thebe. All four moons are not big enough to be spherical shaped, instead being irregular shaped. the moon was discovered by the Voyager Probe team.
Adrastea is a nymph from Greek mythology who had been asked by Rhea, mother of Zeus to look after Zeus. Adrastea had been tasked because if Cronus, Zeus's father had found him, Cronus would eat his son to maintain his rule.
Galilean Moons are the four largest moons that orbit Jupiter. All four were discovered by Galileo Galilei when he looked up at Jupiter. Galileo is the Italian Astronomer who is credited with inventing the telescope.
|Orbital Circumference||810,530.25 km|
|Furthest from parent (Apoasis)||129,232 km|
|Year of Discovery||1979|
|Semi-Major Axis||129,000 km|
|Equatorial Circumference||51.5 km|
|Mean Radius||8.2 km|
|Surface Area||844.96 km2|
|Surface Gravity||0.007 m/s2|
|Average Orbit Velocity||113,329.2 km/h|
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