S / 2003 J 19
| S / 2003 J 19 | |
|---|---|
| Central body | Jupiter |
| Properties of the orbit | |
| Major semi-axis | 23,535,000 km |
| Periapsis | 17,512,000 km |
| Apoapsis | 29,558,000 km |
| eccentricity | 0.256 |
| Orbit inclination | 165.154 ° |
| Orbital time | 740.43 d |
| Mean orbital velocity | 2.31 km / s |
| Physical Properties | |
| Albedo | ≈ 0.04 |
| Apparent brightness | 23.7 mag |
| Medium diameter | ≈ 2 km |
| Dimensions | ≈ 1.5 × 10 13 kg |
| Medium density | ≈ 2.6 g / cm 3 |
| Acceleration of gravity on the surface | ≈ 0 m / s 2 |
| Escape speed | ≈ 0 m / s |
| discovery | |
| Explorer | |
| Date of discovery | February 6, 2003 |
S / 2003 J 19 (also Jupiter LXI) is one of the smallest moons on the planet Jupiter .
discovery
S / 2003 J 19 was discovered by astronomers at the University of Hawaii on February 6, 2003 . The moon has not yet received an official name - the moons of Jupiter are usually female figures from Greek mythology - but is provisionally referred to as S / 2003 J 19 in accordance with the system of the International Astronomical Union (IAU).
Orbit data
S / 2003 J 19 orbits Jupiter at an average distance of 23,533,000 km in 740 days, 10 hours and 5 minutes. The track has an eccentricity of 0.2478. With an inclination of 165.153 ° to the ecliptic , the orbit is retrograde, i.e. that is, the moon moves around the planet against the direction of rotation of Jupiter.
Due to its orbit characteristics, S / 2003 J 19 is assigned to the Carme Group , named after the Jupiter moon Carme .
Physical data
From the apparent brightness of 23.7 m and the estimated albedo of 0.04 - d. H. 4% of the irradiated sunlight is reflected - a diameter of about 2 km is derived for S / 2000 J 19.
The estimates of the mean density are even more uncertain: There is much to suggest that the dwarf moon resembles the bodies of the asteroid belt . From this, a structure is derived mainly from silicate rock, which in turn suggests an estimated density of 2.6 g / cm³ in the case of a compact body. However, if the moon resembles a conglomerate of cosmic debris, such as the asteroid Mathilde , this value can only be just over 1 g / cm³.
Web links
- MPEC 2003-G64: S / 2003 J 19 April 12, 2003 (discovery)
- IAUC 8125: S / 2003 J 19 and S / 2003 J 20 April 30, 2003 (discovery)
- MPC 111804: Numbering of Natural Satellites September 25, 2018 (numbering)
| before | Jupiter moons | after that |
| S / 2003 J 16 | S / 2003 J 19 |
S / 2003 J 23 |