S / 2003 J 12

S / 2003 J 12
Central body	Jupiter
Properties of the orbit
Major semi-axis	17,833,000 km
Periapsis	9,059,000 km
Apoapsis	26,607,000 km
eccentricity	0.4920
Orbit inclination	151.10 °
Orbital time	489.7 d
Mean orbital velocity	2.48 km / s
Physical Properties
Albedo	0.04
Apparent brightness	23 likes
Medium diameter	≈ 1 km
Dimensions	≈ 1.4 × 10 12 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 8, 2003

S / 2003 J 12 is one of the smaller moons of the planet Jupiter .

discovery

S / 2003 J 12 was discovered on February 8, 2003 by astronomers Scott S. Sheppard , David C. Jewitt , Yanga R. Fernández, and Eugene A. Magnier . The moon has not yet received an official name - the moons of Jupiter are usually female figures from Greek mythology - but is provisionally referred to as S / 2003 J 12 in accordance with the system of the International Astronomical Union (IAU).

Orbit data

S / 2003 J 12 orbits Jupiter at an average distance of 17,833,000 km in 489.7 days. The track has an eccentricity of 0.4920. With an inclination of 151.140 ° to the ecliptic, the orbit is retrograde; That is, the moon moves in the opposite direction to Jupiter's direction of rotation around the planet.

S / 2003 J 12 is the innermost of Jupiter's outer irregular moons . It does not belong to any of the groups of moons that orbit the planet in similar orbits.

Physical data

S / 2003 J 12 has a diameter of about 1 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 23.9 ^m .

Web links

• IAUC 8089: Satellites of Jupiter March 7, 2003 (discovery)
• MPEC 2003-E29: S / 2003 J 9, 2003 J 10, 2003 J 11, 2003 J 12; S / 2003 J 1, 2003 J 6 March 7, 2003 (discovery)

before	Jupiter moons	after that
S / 2003 J 10	S / 2003 J 12	S / 2003 J 16