S/2003 J 2

Astronomers at the University of Hawaii

S/2003 J 2 is one of the smaller moons of the planet Jupiter.

Discovery

S/2003 J 2 was discovered on February 5, 2003 by astronomers at the University of Hawaii. The moon has not yet received no official name - these are among the moons of Jupiter usually female figures from Greek mythology - but is in accordance with the Nomenclature of the International Astronomical Union ( IAU) tentatively identified as S/2003 J 2 respectively.

Path data

S/2003 J 2 is so far the outermost known moon of Jupiter. It orbits the planet at an average distance of 29,541,000 km in 979 days, 23 hours and 46 minutes. The track has an eccentricity of 0.2255. With an inclination of 160.638 ° the web is retrograde, that is, the moon moves against the direction of rotation of Jupiter around the planet.

He belongs to no known group of moons that orbit Jupiter on shared paths.

The boundary of Jupiter's gravitativem influence is defined by the Hill sphere whose radius is about. Here, and Jupiter's semi-major axis and mass, and the mass of the sun. This results in a radius of about 52 million kilometers. S 2003 J 2 away on its eccentric orbit, up to 36 million km from Jupiter. Maybe go even farther moons lost.

Physical data

S/2003 J 2 has a diameter of about 2 km. Its density is estimated to be 2.6 g / cm ³. He is probably made ​​up predominantly of silicate rock. It has a very dark surface with an albedo of 0.04, i.e., only 4% of the incident sunlight is reflected. Its apparent magnitude is 23.2 m.

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