12052 Aretaon
12052 Aretaon /ærɪˈteɪɒn/ is a mid-sized Jupiter trojan from the Trojan camp, approximately 40 kilometers (25 miles) in diameter. It was discovered on 3 May 1997, by Belgian astronomer Eric Elst at ESO's La Silla Observatory in northern Chile. The dark Jovian asteroid has a rotation period of 8.05 hours. It was named after Aretaon from Greek mythology.
| Discovery | |
|---|---|
| Discovered by | E. W. Elst |
| Discovery site | La Silla Obs. |
| Discovery date | 3 May 1997 |
| Designations | |
MPC designation | (12052) Aretaon |
| Pronunciation | /ærɪˈteɪɒn/ |
Named after | Ἀρετάων Aretāōn (Greek mythology) |
Alternative designations | 1997 JB16 · 1977 UG5 1999 NE62 |
Minor planet category | Jupiter trojan Trojan · background |
| Orbital characteristics | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 40.60 yr (14,828 d) |
| Aphelion | 5.5958 AU |
| Perihelion | 4.8837 AU |
Semi-major axis | 5.2397 AU |
| Eccentricity | 0.0680 |
Orbital period (sidereal) | 11.99 yr (4,381 d) |
Mean anomaly | 197.23° |
Mean motion | 0° 4m 55.92s / day |
| Inclination | 11.463° |
Longitude of ascending node | 219.79° |
| 85.727° | |
| Jupiter MOID | 0.256 AU |
| TJupiter | 2.9550 |
| Physical characteristics | |
Mean diameter | 39.151±0.809 km 42.23 km (calculated) |
Synodic rotation period | 8.05 h |
| 0.057 (assumed) 0.073±0.013 | |
| C (assumed) | |
| 10.425±0.002 (R) 10.50 10.6 | |
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