1647 Menelaus
From Wikipedia, the free encyclopedia
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Discovery[1] and designation
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| Discovered by | Seth Barnes Nicholson |
| Discovery date | June 23, 1957 |
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Designations
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| Alternative names[1] | 1957 MK |
| Minor planet category |
Jupiter Trojan |
| Epoch February 04, 2008 (JD 2454500.5) | |
| Aphelion | 799.903 Gm (5.347 AU) |
| Perihelion | 765.616 Gm (5.118 AU) |
| Semi-major axis | 782.759 Gm (5.232 AU) |
| Eccentricity | 0.022 |
| Orbital period | 4371.724 d (11.97 a) |
| Average orbital speed | 13.02 km/s |
| Mean anomaly | 160.599° |
| Inclination | 5.644° |
| Longitude of ascending node | 240.368° |
| Dimensions | 72.0 km |
| Mass | 3.9×1017 kg |
| Mean density | 2.0 g/cm³ |
| Equatorial surface gravity | 0.0201 m/s² |
| Equatorial escape velocity | 0.0381 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 | 10.3 |
1647 Menelaus 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 Menelaus. It was discovered by Seth Barnes Nicholson on June 23, 1957 in Palomar, California at the Palomar Observatory.
[edit] External links
- Discovery Circumstances: Numbered Minor Planets
- Orbital simulation from JPL (Java) / Ephemeris
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