S / 2003 J 18

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S / 2003 J 18
Central body Jupiter
Properties of the orbit
Major semi-axis 20,426,000 km
Periapsis 19,198,000 km
Apoapsis 21,654,000 km
eccentricity 0.060
Orbit inclination 145.91 °
Orbital time 596.58 d
Mean orbital velocity 2.49 km / s
Physical Properties
Albedo 0.04
Apparent brightness 23.4 mag
Medium diameter ≈ 2 km
Dimensions ≈ 1.1 × 10 13 kg
Medium density asymp; 2.6 g / cm 3
Acceleration of gravity on the surface ≈ 0 m / s 2
Escape speed ≈ 0 m / s
discovery
Explorer

IFA Hawaii

Date of discovery February 6, 2003

S / 2003 J 18 (also Jupiter LV ) is one of the smaller moons of the planet Jupiter .

discovery

S / 2003 J 18 was discovered by astronomers at the University of Hawaii on February 6, 2003 . The moon has not yet been given an official name - the moons of Jupiter are usually female figures from Greek mythology - but is provisionally designated as S / 2003 J 18 in accordance with the system of the International Astronomical Union (IAU).

Orbit 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 orbit is retrograde; that is, the moon moves around the planet against the direction of rotation of Jupiter.

Due to its orbit characteristics, S / 2003 J 18 is assigned to the Ananke group , named after the Jupiter moon Ananke .

Physical data

S / 2003 J 18 has a diameter of about 2 km. Its density is estimated at 2.6 g / cm³. It is probably made up mainly of silicate rock. It has a very dark surface with an albedo of 0.04, i.e. that is, only 4% of the incident sunlight is reflected.

Web links

before Jupiter moons after that
S / 2016 J 1 S / 2003 J 18
S / 2011 J 2