2260 Neoptolemus
From Wikipedia, the free encyclopedia
|
Discovery[1] and designation
|
|
|---|---|
| Discovered by | Purple Mountain Observatory |
| Discovery date | November 26, 1975 |
|
Designations
|
|
| Alternative names[1] | 1975 WM1 |
| Minor planet category |
Jupiter Trojan |
| Epoch February 04, 2008 (JD 2454500.5) | |
| Aphelion | 811.004 Gm (5.421 AU) |
| Perihelion | 741.798 Gm (4.959 AU) |
| Semi-major axis | 776.401 Gm (5.190 AU) |
| Eccentricity | 0.045 |
| Orbital period | 4318.565 d (11.82 a) |
| Average orbital speed | 13.07 km/s |
| Mean anomaly | 294.676° |
| Inclination | 17.782° |
| Longitude of ascending node | 86.570° |
| Dimensions | 71.7 km |
| Mass | 3.9×1017 kg |
| Mean density | 2.0 g/cm³ |
| Equatorial surface gravity | 0.0200 m/s² |
| Equatorial escape velocity | 0.0379 km/s |
| Sidereal rotation period |
? d |
| Axial tilt | ?° |
| Pole ecliptic latitude | ? |
| Pole ecliptic longitude | ? |
| Geometric albedo | 0.10 |
| Temperature | ~122 K |
| Spectral type | ? |
| Absolute magnitude | 9.31 |
2260 Neoptolemus 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 Neoptolemus, the son of Achilles. It was discovered by the Purple Mountain Observatory in Nanjing, China on November 26, 1975.
[edit] External links
- Discovery Circumstances: Numbered Minor Planets
- Orbital simulation from JPL (Java) / Ephemeris
|
|||||
