Carpo (moon)
| Carpo | |
|---|---|
| Provisional or systematic name | S / 2003 J 20 |
| Central body | Jupiter |
| Properties of the orbit | |
| Major semi-axis | 16,989,000 km |
| Periapsis | 9,688,827 km |
| Apoapsis | 24,289,173 km |
| eccentricity | 0.4297 |
| Orbit inclination | 51.395 ° |
| Orbital time | 456.30 d |
| Mean orbital velocity | 2.59 km / s |
| Physical Properties | |
| Albedo | 0.04 |
| Apparent brightness | 23.0 likes |
| Medium diameter | 3 km |
| Dimensions | ≈ 3.7 × 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 9, 2003 |
Carpo (also Jupiter XLVI) is one of the smaller moons of the planet Jupiter .
discovery
S / 2003 J 20 was discovered by astronomers at the University of Hawaii on February 9, 2003 . On March 30, 2005, the moon received the official name Carpo (after the Hore Carpo ) by the International Astronomical Union (IAU).
Orbit data
Carpo orbits Jupiter at an average distance of 16,989,000 km in 456 days, 2 hours and 24 minutes. The orbit has a large eccentricity of 0.4297 and Carpo is the outermost prograde (clockwise) Jupiter moon, i.e. H. Jupiter's outermost moon, which orbits Jupiter in the same direction as Jupiter rotates on its own axis.
Like Themisto , Carpo does not seem to belong to any of the usual groups of Jupiter's moons that have similar orbital properties. Its current orbit inclination of about 51.4 ° in relation to the ecliptic is above the minimum value of the Kozai effect , named after Yoshihide Kozai , who discovered this phenomenon in 1962 . This effect causes a periodic change between the eccentricity and the inclination. If the inclination is large enough, the eccentricity can become so great that the celestial body on its periapsis (closest distance from Jupiter ) comes close to the great Galilean moons ( Io , Europa , Ganymede and Callisto ). This could lead to Carpo colliding with one of the large moons or being thrown out of the Jupiter system by their gravitational forces.
Physical data
Carpo has a diameter of about 3 km. Its density is estimated at 2.6 g / cm³ if it should be composed mainly of silicate rock. It has a very dark surface with an albedo of 0.04, i.e. that is, only 4% of incident sunlight is reflected. Their mean apparent magnitude is 23.0 m .
Web links
- MPEC 2003-G67: S / 2003 J 20 April 14, 2003 (discovery)
- IAUC 8125: S / 2003 J 19 and S / 2003 J 20 April 30, 2003 (discovery)
- MPEC 2004-E39: S / 2003 J 20 March 13, 2004 (rediscovery)
- IAUC 8502: Satellites of Jupiter March 30, 2005 (numbering and naming)
| before | Jupiter moons | after that |
| Helike | Carpo |
Eukelade |