Ananke

Ananke is an irregular moon of Jupiter. It was discovered by Seth Barnes Nicholson at Mount Wilson Observatory in 1951. It was named after the Greek mythological Anagkē, the personification of necessity, and the mother of the Moirai (Fates) by Zeus.
Ananke gives its name to the Ananke group, retrograde irregular moons which orbit Jupiter between 19.3 and 22.7 Gm, at inclinations of roughly 150°.
== Orbit ==
The orbital elements are as of January 2000. They are continuously changing due to solar and planetary perturbations. The diagram illustrates Ananke's orbit in relation to other retrograde irregular satellites of Jupiter. The eccentricity of selected orbits is represented by the yellow segments (extending from the pericentre to the apocentre). The outermost regular satellite Callisto is located for reference.
Given these orbital elements and the physical characteristics known so far, Ananke is thought to be the largest remnant of an original break-up, forming the Ananke group.
== Physical Characteristics ==
In the visible spectrum, Ananke appears neutral to light-red. The infrared spectrum is similar to P-type asteroids and a possible indication of water on it.
Category:Moons
Category:Jovian Moons
Category:Irregular Satellites of Jupiter
Category:Ananke Group
Category:Outer Moon of Jupiter
Category:Objects with No Atmosphere
Category:Objects Not in Hydrostatic Equilibrium
Category:Outer Solar System Object
Category:Retrograde Satellite
Category:Numbered Objects
Category:Numbered Moons
Category:Named Moons
Category:Named Objects