S/2003 J 18

IFA Hawaii

S/2003 J 18 is one of the smaller moons of the planet Jupiter.

Discovery

S/2003 J 18 was discovered on February 6, 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 18 denotes.

Path data

S/2003 J 18 orbits Jupiter at an average distance of 20,426,000 km in 596.58 days. The track has an eccentricity of 0.060. With an inclination of 145.9 ° to the local Laplace plane the web is retrograde, that is, the moon moves against the direction of rotation of Jupiter around the planet.

Because of its web properties is S/2003 J 18 of the Ananke group, named after Jupiter's moon Ananke assigned.

Physical data

S/2003 J 18 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.