2456 Palamedes
From Wikipedia, the free encyclopedia
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Discovery[1] and designation
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| Discovered by | Purple Mountain Observatory |
| Discovery date | January 30, 1966 |
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Designations
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| Alternative names[1] | 1966 BA1 |
| Minor planet category |
Jupiter Trojan |
| Epoch February 04, 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° |
| 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 |
| Sidereal rotation period |
? d |
| Axial tilt | ?° |
| Pole ecliptic latitude | ? |
| Pole ecliptic longitude | ? |
| Geometric albedo | 0.10 |
| Temperature | ~123 K |
| Spectral type | ? |
| Absolute magnitude | 9.6 |
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.
[edit] External links
- Discovery Circumstances: Numbered Minor Planets
- Orbital simulation from JPL (Java) / Ephemeris
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