2920 Automedon
| Discovery | |
|---|---|
| Discovered by | Edward L. G. Bowell |
| Discovery date | May 3, 1981 |
| Designations | |
Named after | Automedon |
| 1981 JR | |
| Jupiter Trojan | |
| Orbital characteristics | |
| Epoch February 4, 2008 (JD 2454500.5) | |
| Aphelion | 785.896 Gm (5.253 AU) |
| Perihelion | 743.603 Gm (4.971 AU) |
| 764.750 Gm (5.112 AU) | |
| Eccentricity | 0.028 |
| 4221.719 d (11.56 a) | |
Average orbital speed | 13.17 km/s |
| 266.253° | |
| Inclination | 21.119° |
| 230.955° | |
| Physical characteristics | |
| Dimensions | 111.0 km |
| Mass | 1.4×1018 kg |
Mean density | 2.0 g/cm³ |
Equatorial surface gravity | 0.0310 m/s² |
Equatorial escape velocity | 0.0587 km/s |
| 0.10 | |
| Temperature | ~123 K |
| 8.8 | |
|
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2920 Automedon is a Jupiter Trojan asteroid that orbits in the L4 Lagrangian point of the Sun-Jupiter system, in the "Greek Camp" of Trojan asteroids. It was named after the Greek hero Automedon, who fought during the Trojan War. It was discovered by Edward L. G. Bowell at the Anderson Mesa station of the Lowell Observatory on May 3, 1981.
Photometric observations of this asteroid during 1994 were used to build a light curve showing a rotation period of 10.220 ± 0.004 hours with a brightness variation of 0.12 ± 0.01 magnitude.[1]
References
- ↑ Mottola, Stefano; Di Martino, Mario; Erikson, Anders; Gonano-Beurer, Maria; Carbognani, Albino; Carsenty, Uri; Hahn, Gerhard; Schober, Hans-Josef; Lahulla, Felix; Delbò, Marco; Lagerkvist, Claes-Ingvar (May 2011). "Rotational Properties of Jupiter Trojans. I. Light Curves of 80 Objects". The Astronomical Journal 141 (5): 170. Bibcode:2011AJ....141..170M. doi:10.1088/0004-6256/141/5/170.
External links
- Discovery Circumstances: Numbered Minor Planets
- Orbital simulation from JPL (Java)
- Ephemeris
- 2920 Automedon at the JPL Small-Body Database
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