S / 2003 J 18 is the natural satellite of Jupiter.
| S / 2003 J 18 | |
|---|---|
| Jupiter's satellite | |
| Discovery story | |
| Discoverer | |
| opening date | February 6, 2003 |
| Orbital characteristics | |
| Eccentricity | 0.060 ° |
| Circulation period | 596.58 days |
| Orbital inclination | 147 ° ( ecliptic ) 149 ° ( equator to Jupiter) |
| physical characteristics | |
| Diameter | ~ 2 km |
| Weight | ~ 1,1⋅10 13 kg |
| Density | 2.6 g / cm³ |
| Albedo | 0.04 |
| Atmosphere | missing |
Content
Opening
It was discovered on February 6, 2003 by a group of astronomers from the University of Hawaii under the direction of Brett Gladman [1] [2] . The satellite has not yet received an official name.
Orbit
S / 2003 J 18 makes a complete revolution around Jupiter at an average distance of 20,426,000 km in 596.58 days. The orbit has an eccentricity of 0.060. The inclination of the retrograde orbit to the local Laplace plane is 145.9 °. Belongs to the Ananke group .
Physical Characteristics
The diameter of S / 2003 J 18 is about 2 km. The density is estimated at 2.6 g / cm³, since the satellite is supposedly composed primarily of silicate rocks. A very dark surface has an albedo of 0.04. The magnitude is 23.4 m .
Notes
- ↑ IAUC 8116: Satellites of Jupiter and Saturn . Archived on May 5, 2006. April 11, 2003 (Opening)
- ↑ MPEC 2003-G20: S / 2003 J 18 April 4, 2003 (Discovery and ephemeris)