2456 Palamedes
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| Discovery and designation | |
|---|---|
| Discovered by | Purple Mountain Observatory |
| Discovery date | January 30, 1966 |
| Designations | |
| Alternative names | 1966 BA1 |
| Minor planet category | Jupiter Trojan |
| Orbital characteristics | |
| Epoch February 4, 2008 (JD 2454500.5) | |
| Aphelion | 826.050 Gm (5.522 AU) |
| Perihelion | 710.392 Gm (4.749 AU) |
| Semi-major axis | 768.221 Gm (5.135 AU) |
| Eccentricity | 0.075 |
| Orbital period | 4250.496 d (11.64 a) |
| Average orbital speed | 13.12 km/s |
| Mean anomaly | 272.936° |
| Inclination | 13.907° |
| Longitude of ascending node | 327.408° |
| Physical characteristics | |
| Dimensions | 91.7 km |
| Mass | 8.1×1017 kg |
| Mean density | 2.0 g/cm³ |
| Equatorial surface gravity | 0.0256 m/s² |
| Equatorial escape velocity | 0.0485 km/s |
| Geometric albedo | 0.10 |
| Temperature | ~123 K |
| Absolute magnitude (H) | 9.6 |
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2456 Palamedes 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 Palamedes. It was discovered by the Purple Mountain Observatory in Nanjing, China on January 30, 1966.
Photometric observations of this asteroid during 1995 were used to build a light curve showing a rotation period of 7.258 ± 0.004hours with a brightness variation of 0.05 ± 0.01 magnitude.[1]
References
- ↑ Mottola, S. et al. (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
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