Hegemone (moon)

IFA Hawaii

Hegemone ( Jupiter XXXIX) is one of the smaller moons of the planet Jupiter.

Discovery

Hegemone was discovered on February 8, 2003 by astronomers at the University of Hawaii, and was initially provided with the provisional designation S/2003 J 8. On 30 March 2005, the moon was awarded by the International Astronomical Union ( IAU) the official name Hegemone, according to one of the Graces of Greek mythology.

Path data

Hegemone orbits Jupiter at an average distance of 23,947,000 km in 739 days, 14 hours and 24 minutes. The track has an eccentricity of 0.3276. With an inclination of 155.214 ° the web is retrograde, that is, the moon moves against the direction of rotation of Jupiter around the planet.

Because of their web properties is Hegemone the Pasiphae group, named after Jupiter's moon Pasiphae assigned.

Physical data

Hegemone has a diameter of about 3 km. Their density is estimated to be 2.6 g / cm ³. It is probably made ​​up predominantly of silicate rock. It has a very dark surface with an albedo of 0.04, which means that only 4% of the incident sunlight is reflected. Their apparent brightness is 22.9 m.