Ananke was discovered on 28/ September 1951 by Seth Barnes Nicholson.
The orbital period, i.e. the period it takes to complete an orbit round Jupiter is 629.8 days. The figure is also known as the sidereel period. The figure comes from N.A.S.A..
The Equatorial Radius of the object is 14km. The Equatorial Radius is based on the assumption of the Albedo value. The value is the radius in km of the said object at the Equator.
The albedo of the object is 0.04. The Albedo is the amount of radiation that is reflected back into space by the object.
The Escape Velocity of the object is 61 km/h. The Escape Velocity is the speed an object needs to be travelling in order to break free from the objects gravity. The larger an object is, the more velocity (speed) is needed to break free from the object.The Semi-Major Axis of the orbit is 21280, which is the furthest point from the centre to the edge of an elliptical point.
The equatorial circumference of Ananke is 88.0 km. The surface area of Ananke is 2,463.01. The surface gravity of the said item is 0.010. The Mean orbit velocity, that is the speed at which it orbits is 8712.00 km/h. The is the average distance in km of the object is from its parent 21276000.00.
The orbital inclination, the angle at which Ananke orbits in relation to the orbital plane is 148.9 degrees. The orbital eccentricity is 0.2435, it is the degree at which Ananke orbits close to a circular (0) orbit as opposed to an elliptical (1) orbit.
Ananke is from Ancient Greek legends as was common for most of the planetary moons out there. Ananke was one of the first goddess to appear. Ananke is the goddess of Necessity, Compulson and Inevitability. With her mate, Chronos (Time), they set about the creation of the universe, crushing the primal egg of creation. Theoi
Ananke group of Jovian moons are all believed to have the same source, probably the result of a asteroid collision. The remnants were caught by the immense gravitational pull of Jupiter and remain in orbit ever since. The name derives it name from the largest in the group. All the members of the group orbit in a retrograde orbit hence why they all finish with the letter 'e' in their name.
|Orbital Direction||Retrograde, opposite to the parents direction|
|Date of Discovery||28/ September 1951|
|Discoverer||Seth Barnes Nicholson|
|Orbital Period (days)||629.8|
|Equatorial Radius (km)||14|
|Escape Velocity (km/h)||61|
|Semi-Major Axis (10^3 km)||21280|
|Equatorial Circumference (km)||88.0|
|Surface Area (km^2)||2,463.01|
|Surface Gravity (m/s^2)||0.010|
|Mean Orbit Velocity (km/h)||8712.00|
|Average Orbit Distance (km)||21276000.00|
|Orbital Inclination (degrees)||148.9|
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