Iocaste (moon)

Iocaste
Provisional or systematic name	S / 2000 J 3
Central body	Jupiter
Properties of the orbit
Major semi-axis	21,269,000 km
Periapsis	16,674,900 km
Apoapsis	25,863,100 km
eccentricity	0.216
Orbit inclination	149.4 °
Orbital time	631.5 d
Mean orbital velocity	2.45 km / s
Physical Properties
Albedo	0.04
Apparent brightness	21.8 mag
Medium diameter	5 km
Dimensions	1.9 × 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

Iocaste (also Jupiter XXIV) is one of the smaller outer moons of the planet Jupiter .

discovery

Iocaste was discovered by astronomers at the University of Hawaii on November 23, 2000 . It was initially given the provisional designation S / 2000 J 3.

The moon was named after Iokaste , the mother of Oedipus from Greek mythology .

Orbit data

Iocaste orbits Jupiter at a mean distance of 21,269,000 km in 631 days and 12 hours. The track has an eccentricity of 0.216. With an inclination of 149.4 ° from the local Laplace plane , the orbit is retrograde, i.e. that is, the moon moves around the planet against the direction of rotation of Jupiter.

Due to its orbital properties, Iocaste is assigned to the Ananke group , named after the Jupiter moon Ananke .

Physical data

Iocaste has a diameter of about 5 km. Their density is estimated at 2.6 g / cm³. It is presumably composed mainly of silicate rock and 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 21.8 ^m .

Web links

• IAUC 7555: Satellites of Jupiter January 5, 2001 (discovery)
• MPEC 2001-A28: S / 2000 J 2, S / 2000 J 3, S / 2000 J 4, S / 2000 J 5, S / 2000 J 6 January 5, 2001 (discovery)
• MPEC 2001-W07: S / 2000 J 3 November 16, 2001 (rediscovery)
• IAUC 7998: Satellites of Jupiter October 22, 2002 (numbering and naming)

before	Jupiter moons	after that
Kalyke	Iocaste	Erinome