(18281) Tros
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Asteroid (18281) Tros |
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|---|---|
| Properties of the orbit ( animation ) | |
| Orbit type | Jupiter Trojan (L 5 ) |
| Major semi-axis | 5.1862 AU |
| eccentricity | 0.1053 |
| Perihelion - aphelion | 4.6402 AU - 5.7322 AU |
| Inclination of the orbit plane | 9.5456 ° |
| Length of the ascending node | 171.2417 ° |
| Argument of the periapsis | 169.8798 ° |
| Sidereal period | 11.81 a |
| Mean orbital velocity | 13.09 km / s |
| Physical Properties | |
| Absolute brightness | 12.5 mag |
| history | |
| Explorer |
Cornelis Johannes van Houten , Ingrid van Houten-Groeneveld , Tom Gehrels |
| Date of discovery | October 16, 1977 |
| Another name | 4317 T-3 , 1988 RK 12 |
| Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items. | |
(18281) Tros is an asteroid belonging to the group of Jupiter Trojans . This describes asteroids that orbit the sun on the Lagrange points on the orbit of the planet Jupiter . It is assigned to the Lagrange point L 5 , that is, (18281) Tros follows Jupiter by 60 ° in its orbit around the sun.
The asteroid was discovered on October 16, 1977 by the Dutch astronomer couple Cornelis Johannes van Houten and Ingrid van Houten-Groeneveld . The discovery took place during the 3rd Trojan survey, during which Tom Gehrels surveyed field plates recorded by the 120 cm Oschin Schmidt telescope of the Palomar observatory at the University of Leiden , 17 years after the start of the Palomar-Leiden- Surveys .
(18281) Tros was named after Tros , a grandson of Dardanos and ancestor of the Trojans . In the case of asteroids, trailing Trojans are named after Trojan heroes. It was named on March 9, 2001. As early as 1979, an impact crater on Jupiter's moon Ganymede was named after Tros: Ganymede crater Tros .
Web links
- (18281) Tros in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (18281) Tros in the Small-Body Database of the Jet Propulsion Laboratory (English).
- Discovery Circumstances of (18281) Tros according to the Minor Planet Center of the International Astronomical Union at the Harvard-Smithsonian Center for Astrophysics in Cambridge , Massachusetts (English)
Individual evidence
- ↑ The Ganymedkrater Tros in the Gazetteer of Planetary Nomenclature of the IAU (WGPSN) / USGS