Ananke (moon)
| discovery | |
|---|---|
| discoverer | S. B. Nicholson |
| date of the discovery | 28. September 1951 |
| data of the orbit | |
| middle course radius | 21.276.000 km |
| course eccentricity | 0.2435 |
| scan time | 629,77 days |
| inclination | 148,889° |
| natural satellite | of the Jupiter |
| physical data | |
| of middle diameters | 28 km |
| surface | 2500 km 2 |
| mass | ~3×10 16 kg |
| of density | 2.6 (?) g/cm 3 |
| gravitation at the surface | ~0.010 m/s 2 |
| escape velocity | ~20 m/s |
| Sideri rotation | unknown |
| inclination of the rotation axle | unknown |
| albedo | 0.04 |
| apparent brightness | 18.8 m |
| surface temperature | |
| atmospheric pressure | |
Ananke (Jupitermond XII) is one of the outside moons of the planet Jupiter.
Table of contents |
discovery
Ananke became to 28. September 1951 of the astronomer Seth Barnes Nicholson at the Mount Wilson observatory in California discovers.
The moon was designated after Ananke, a loving of the Zeus from the Greek mythology. It received their official name 1975, it simply as Jupitermond XII was before designated, since it discovered the twelfth moon with Jupiter was.
Jupiter
in a middle distance from 21.276.000 km circles course data Ananke in 629 days, 18 hours and 29 minutes. The course exhibits an eccentricity of 0,2435. With an inclination from 148,889° the course is retrograd, is called the moon moves against the rotation direction of the Jupiter around the planet.
Ananke is the Namensgeberin of a group of moons, which move on similar courses around Jupiter. The Ananke group covers eight to sixteen moons, whereby Ananke is the largest member.
physical data
Ananke has a middle diameter of approximately 28 km. Their density becomes estimated on 2,6 g/cm 3. It is probably predominantly composed of silikatischem rock. Ananke exhibits a very dark surface with an albedo of 0,04, that is called only 4% of the irradiated sunlight is reflected. Their apparent brightness amounts to 18.8 m.
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Adrastea | Aitne | Amalthea | Ananke | Aoede | Ark | Autonoe | Callirrhoe | Carme | Carpo | Chaldene | Cyllene | Elara | Erinome | Euanthe | Eukelade | Euporie | Europe | Eurydome | Ganymed | Harpalyke | Hegemone | Helike | Hermippe | Himalia | IO | Iocaste | Isonoe | Kale | Kallichore | Kallisto | Kalyke | Leda | Lysithea | Megaclite | Metis | Mneme | Orthosie | Pasiphae | Pasithee | Praxidike | Sinope | Sponde | Taygete | Thebe | Thelxinoe | Themisto | Thyone
Unnamed satellites: S/2000 J 11 | S/2003 J 2 | S/2003 J 3 | S/2003 J 4 | S/2003 J 5 | S/2003 J 9 | S/2003 J 10 | S/2003 J 12 | S/2003 J 14 | S/2003 J 15 | S/2003 J 16 | S/2003 J 17 | S/2003 J 18 | S/2003 J 19 | S/2003 J 23
