Thyone (moon)

Thyone
Provisional or systematic name	S / 2001 J 2
Central body	Jupiter
Properties of the orbit
Major semi-axis	20,940,000 km
Periapsis	16,144,800 km
Apoapsis	25,735,300 km
eccentricity	0.229
Orbit inclination	148.5 °
Orbital time	627.3 d
Mean orbital velocity	2.43 km / s
Physical Properties
Albedo	0.04
Apparent brightness	22.3 mag
Medium diameter	4 km
Dimensions	9.0 × 10 13 kg
Acceleration of gravity on the surface	≈ 0 m / s 2
Escape speed	≈ 0 m / s
discovery
Explorer	IFA Hawaii
Date of discovery	December 11, 2001

Thyone (also Jupiter XXIX) is one of the smallest known outer moons of the planet Jupiter .

discovery

Thyone was discovered by astronomers at the University of Hawaii on December 11, 2001 . It was initially given the provisional designation S / 2001 J 2.

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

Orbit data

Thyone orbits Jupiter at an average distance of 20,940,000 km in 627 days and 7 hours. The track has an eccentricity of 0.229. With an inclination of 148.5 ° 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, Thyone is assigned to the Ananke Group , named after the Jupiter moon Ananke .

Physical data

Thyone has a mean diameter of about 4 km. Their density is estimated at 2.6 g / cm³. It is probably made up mainly of silicate rock. Thyone 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 22.3 ^m .

Web links

• MPEC 2002-J54: Eleven new Satellites of Jupiter May 15, 2002 (discovery)
• IAUC 7900: Satellites of Jupiter May 16, 2002 (discovery)
• MPEC 2002-V06: S / 2001 J 2, 2001 J 3 November 1, 2002 (rediscovery)
• IAUC 8177: Satellites of Jupiter, Saturn, Uranus August 8, 2003 (numbering and naming)

before	Jupiter moons	after that
Autonoe	Thyone	Hermippe