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Ananke (moon)

From Academic Kids

Ananke
Discovery
Discovered by S. B. Nicholson
Discovered on September 28, 1951
Orbital characteristics
Mean radius 20,815,230 km (0.13914 AU)
Eccentricity 0.3963
Periastron 12,567,000 km (0.084 AU)
Apastron 29,063,500 km (0.194 AU)
Orbital period 613.518491 d (1.680 a)
Orbital circumference 125,489,900 km (0.839 AU)
Orbital velocity max: 3.752 km/s
mean: 2.367 km/s
min: 1.622 km/s
Inclination 162.109 (to the ecliptic)
149.526 (to Jupiter's equator)
Is a satellite of Jupiter
Physical characteristics
Mean diameter 28 km
Surface area ~2500 km2
Volume ~11,500 km3
Mass 3.0×1016 kg
Mean density 2.6 g/cm3
Surface gravity 0.010 m/s2 (0.001 g)
Escape velocity ~0.017 km/s
Rotation period  ?
Axial tilt  ?°
Albedo 0.04
Surface temp.
min mean max
K ~124 K K
Atmospheric pressure 0 kPa

Ananke (a-nang'-kee, IPA ; Greek Ανάγκη) is one of Jupiter's moons. It was discovered by Seth Barnes Nicholson at Mount Wilson Observatory in 1951 and is named after the mythological Ananke, the mother of Adrastea by Jupiter.

Ananke did not receive its present name until 1975; before then, it was simply known as Jupiter XII. It was sometimes called "Adrastea". Note that Adrastea is now the name of another satellite of Jupiter.

It 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.

External links


... | S/2003 J 16 | Ananke | Praxidike | ...


Jupiter's natural satellites

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Metis | Adrastea | Amalthea | Thebe | Io | Europa | Ganymede | Callisto | Themisto | Leda | Himalia | Lysithea | Elara | S/2000 J 11 | Carpo | S/2003 J 12 | Euporie | S/2003 J 3 | S/2003 J 18 | Thelxinoe | Euanthe | Helike | Orthosie | Iocaste | S/2003 J 16 | Ananke | Praxidike | Harpalyke | Hermippe | Thyone | Mneme | S/2003 J 17 | Aitne | Kale | Taygete | S/2003 J 19 | Chaldene | S/2003 J 15 | S/2003 J 10 | S/2003 J 23 | Erinome | Aoede | Kallichore | Kalyke | Eurydome | S/2003 J 14 | Pasithee | Cyllene | Eukelade | S/2003 J 4 | Hegemone | Arche | Carme | Isonoe | S/2003 J 9 | S/2003 J 5 | Pasipha | Sinope | Sponde | Autonoe | Callirrhoe | Megaclite | S/2003 J 2
Amalthea group | Galilean moons | Himalia group | Ananke group | Carme group | Pasipha group
fr:Anank (lune)

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