10247 Amphiaraos
10247 Amphiaraos /ˌæmfiəˈreɪəs/ is Jupiter trojan from the Greek camp, approximately 27 kilometers (17 miles) in diameter. It was discovered on 24 September 1960, by Dutch astronomers Ingrid and Cornelis van Houten at Leiden, and Tom Gehrels at the Palomar Observatory in California. The X/D-type asteroid has a long rotation period of 34.26 hours and possibly an elongated shape. It was named after the seer Amphiaraus (Amphiaraos) from Greek mythology.
| Discovery | |
|---|---|
| Discovered by | C. J. van Houten I. van Houten-G. T. Gehrels |
| Discovery site | Palomar Obs. |
| Discovery date | 24 September 1960 |
| Designations | |
MPC designation | (10247) Amphiaraos |
| Pronunciation | /ˌæmfiəˈreɪəs, -ɒs/ |
Named after | Amphiaraus (Greek mythology) |
Alternative designations | 6629 P-L · 1994 PT9 |
Minor planet category | Jupiter trojan Greek · background |
| Orbital characteristics | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 57.01 yr (20,822 d) |
| Aphelion | 5.3043 AU |
| Perihelion | 5.2213 AU |
Semi-major axis | 5.2628 AU |
| Eccentricity | 0.0079 |
Orbital period (sidereal) | 12.07 yr (4,410 d) |
Mean anomaly | 182.20° |
Mean motion | 0° 4m 53.76s / day |
| Inclination | 4.1913° |
Longitude of ascending node | 162.52° |
| 343.92° | |
| Jupiter MOID | 0.2185 AU |
| TJupiter | 2.9950 |
| Physical characteristics | |
Mean diameter | 26.83±0.69 km 33.54 km (calculated) |
Synodic rotation period | 34.26±0.01 h |
| 0.057 (assumed) 0.098±0.015 | |
| X/D (Pan-STARRS) X/D (SDSS-MOC) C (assumed) | |
| 11.0 11.1 11.54±0.33 | |
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