S / 2003 J 23

S / 2003 J 23
Central body	Jupiter
Properties of the orbit
Major semi-axis	23,566,000 km
Periapsis	17,114,000 km
Apoapsis	30,018,000 km
eccentricity	0.274
Orbit inclination	146.397 °
Orbital time	732.45 d
Mean orbital velocity	2.34 km / s
Physical Properties
Albedo	≈ 0.04
Apparent brightness	23.6 mag
Medium diameter	≈ 2 km
Dimensions	≈ 1.5 × 10 13 kg
Medium density	≈ 2.6 g / cm 3
Acceleration of gravity on the surface	≈ 0 m / s 2
Escape speed	≈ 0 m / s
discovery
Explorer	IFA Hawaii
Date of discovery	February 6, 2003

S / 2003 J 23 is one of the smaller moons of the planet Jupiter .

discovery

Image taken in 2003 from the Mauna Kea Observatory .

S / 2003 J 23 was discovered by astronomers at the University of Hawaii on February 6, 2003 . The moon has not yet been given an official name - the moons of Jupiter are usually female figures from Greek mythology - and is therefore provisionally referred to as S / 2003 J 23 in accordance with the system of the International Astronomical Union (IAU).

Orbit data

S / 2003 J 23 orbits Jupiter at a mean distance of 23,563,000 km in 732 days, 10 hours and 34 minutes. The track has an eccentricity of 0.2714. With an inclination of 146.314 ° to the ecliptic , the orbit is retrograde; that is, the moon moves around the planet against the direction of rotation of Jupiter.

Due to its orbital properties, S / 2003 J 23 is assigned to the Pasiphae group , named after the Jupiter moon Pasiphae . Its name, like all retrograde moons, will end with an 'e'.

Physical data

S / 2000 J 23 has a diameter of about 2 km. Its density is estimated at 2.6 g / cm³. It is probably made up mainly of silicate rock. It has a very dark surface with an albedo of 0.04, i.e. that is, only 4% of the incident sunlight is reflected. Its apparent brightness is 23.6 ^m .

Web links

• MPEC 2004-B81: S / 2003 J 23 January 31, 2004 (discovery)
• IAUC 8281: S / 2003 J 23 February 4, 2004 (discovery)

before	Jupiter moons	after that
S / 2003 J 19	S / 2003 J 23	S / 2011 J 1