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 | |
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 |