S/2003 J 4
University of Hawaii
S/2003 J 4 is one of the smaller moons of the planet Jupiter.
Discovery
S/2003 J 4 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 4 respectively.
Path data
S/2003 J 4 orbits Jupiter at an average distance of 23.93 million km in 755 days, 5 hours and 46 minutes. The track has an eccentricity of 0.3618. With an inclination of 149.581 ° 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 4 of the Pasiphae group, named after Jupiter's moon Pasiphae assigned.
Physical data
S/2003 J 4 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 brightness is 23.0 m.