Helike (moon)

IFA Hawaii

Helice ( Jupiter XLV) is one of the smaller moons of the planet Jupiter.

Discovery

Helice was discovered on February 6, 2003 by astronomers at the University of Hawaii. It was initially provisional designation S/2003 J 6, and was on 30 March 2005 by the International Astronomical Union ( IAU) officially named after the ancient Greek city of Helice.

Path data

Helice orbits Jupiter at an average distance of 21,263,000 km in 634 days and 19 hours. The track has an eccentricity of 0.156. With an inclination of 154.8 ° 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 Helice the Ananke group, named after Jupiter's moon Ananke assigned.

Physical data

Helice has a diameter of about 4 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 22.6 m.

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