(10247) Amphiaraos
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Asteroid (10247) Amphiaraos |
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|---|---|
| Properties of the orbit ( animation ) | |
| Orbit type | Jupiter Trojan (L 4 ) |
| Major semi-axis | 5.2482 AU |
| eccentricity | 0.0088 |
| Perihelion - aphelion | 5.2020 AU - 5.2945 AU |
| Inclination of the orbit plane | 4.1928 ° |
| Length of the ascending node | 162.5647 ° |
| Argument of the periapsis | 330.8959 ° |
| Sidereal period | 12.02 a |
| Mean orbital velocity | 12.92 km / s |
| Physical Properties | |
| Rotation period | 34.26 (± 0.01) h |
| Absolute brightness | 11.1 mag |
| history | |
| Explorer |
Cornelis Johannes van Houten , Ingrid van Houten-Groeneveld , Tom Gehrels |
| Date of discovery | September 24, 1960 |
| Another name | 6629 PL , 1994 PT 9 |
| 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. | |
(10247) Amphiaraos 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 4 , that is (10247) Amphiaraos is running 60 ° ahead of Jupiter in its orbit around the sun.
The asteroid was discovered on September 24, 1960 by the Dutch astronomer couple Cornelis Johannes van Houten and Ingrid van Houten-Groeneveld . The discovery came about as part of the Palomar-Leiden survey , during which Tom Gehrels examined field plates recorded at the University of Leiden with the 120 cm Oschin Schmidt telescope of the Palomar observatory .
The eccentricity of the asteroid is small at 0.0088, so that its orbit around the sun comes very close to an ideal circular orbit, similar to the eccentricity of the planet Neptune (0.0086). It is significantly less than the earth's eccentricity (0.0167).
The rotation period of (10247) amphiaraohs was determined by Robert Stephens in February and March 2011 during a guest stay at the Goat Mountain Astronomical Research Station (GMARS) in Rancho Cucamonga , California to be 34.26 (± 0.01) hours. This means that the asteroid rotates unusually slowly on itself.
(10247) Amphiaraos was named after Amphiaraos , a seer of Zeus and a general from Argos . The name was given on January 24, 2000. Trojans running ahead are named after Greek heroes.
Web links
- (10247) Amphiaraos in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (10247) Amphiaraos in the Small-Body Database of the Jet Propulsion Laboratory (English).
- Discovery Circumstances of (10247) Amphiaraos according to the Minor Planet Center of the International Astronomical Union at the Harvard-Smithsonian Center for Astrophysics in Cambridge , Massachusetts (English)
- Extrapolation of the orbit behavior ( memento of September 13, 2001 in the Internet Archive ) based on the Bulirsch-Stoer algorithm over 1500 years with regard to ecliptic and Lagrange point ( GIF , English)
Individual evidence
- ↑ Linda French, Robert Stephens, Daniel Coley, Ralph Megna, Lawrence Wasserman : Photometry of 17 Jovian Trojan Asteroids . Minor Planet Bulletin 39 (2012), page 138, bibcode : 2012MPBu ... 39..183F (English)