Praxidike (moon)

Practice
Provisional or systematic name	S / 2000 J 7
Central body	Jupiter
Properties of the orbit
Major semi-axis	21,147,000 km
Periapsis	16,283,200 km
Apoapsis	26,010,800 km
eccentricity	0.230
Orbit inclination	149.0 °
Orbital time	625.3 d
Mean orbital velocity	2.46 km / s
Physical Properties
Albedo	0.04
Apparent brightness	21.2 mag
Medium diameter	7 km
Dimensions	4.3 × 10 14 kg
Acceleration of gravity on the surface	≈ 0 m / s 2
Escape speed	≈ 0 m / s
discovery
Explorer	IFA Hawaii
Date of discovery	November 23, 2000

Praxidike (also Jupiter XXVII) is one of the smaller outer moons of the planet Jupiter .

discovery

Praxidike was discovered by astronomers at the University of Hawaii on November 23, 2000 . It was initially given the provisional designation S / 2000 J 7.

The moon was named after Praxidike , a mistress of Zeus from Greek mythology .

Orbit data

Praxidike orbits Jupiter at an average distance of 21,147,000 km in 625 days and 7 hours. The track has an eccentricity of 0.230. With an inclination of 149.0 ° from the local Laplace plane , the orbit is retrograde; that is, the moon moves around the planet against the direction of rotation of Jupiter.

Due to its orbital properties, Praxidike is assigned to the Ananke Group , named after the Jupiter moon Ananke .

Physical data

Praxidike has an average diameter of about 7 km. Their density is estimated at 2.6 g / cm³. It is probably made up mainly of silicate rock. Praxidike has a very dark surface with an albedo of 0.04, i.e. that is, only 4% of the incident sunlight is reflected. Their apparent brightness is 21.2 ^m .

Web links

• IAUC 7555: Satellites of Jupiter January 5, 2001 (discovery)
• MPEC 2001-A29: S / 2000 J 7, S / 2000 J 8, S / 2000 J 9, S / 2000 J 10, S / 2000 J 11 January 5, 2001 (discovery)
• MPEC 2002-A27: S / 2000 J 7 January 8, 2002 (rediscovery)
• IAUC 7998: Satellites of Jupiter October 22, 2002 (numbering and naming)

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