(65407) 2002 RP120
From Biocrawler, the free encyclopedia.
| Discovery A (http://cfa-www.harvard.edu/iau/lists/NumberedMPs.html) | |
|---|---|
| Discoverer | Brian A. Skiff/LONEOS |
| Discovery date | September 4 2002 |
| Alternate designations | B (http://cfa-www.harvard.edu/iau/MPDes.html) |
| Category | Damocloid asteroid, Scattered disk object |
| Orbital elements C (http://asteroid.lowell.edu/) Epoch July 14, 2004 (JD 2453200.5) | |
| Eccentricity (e) | 0.956 |
| Semi-major axis (a) | 8368.303 Gm (55.939 AU) |
| Perihelion (q) | 369.948 Gm (2.473 AU) |
| Aphelion (Q) | 16366.658 Gm (109.404 AU) |
| Orbital period (P) | 152,815.148 d (418.39 a) |
| Mean orbital speed | 3.98 km/s |
| Inclination (i) | 119.112° |
| Longitude of the ascending node (Ω) | 39.194° |
| Argument of perihelion (ω) | 358.002° |
| Mean anomaly (M) | 1.523° |
| Physical characteristics | |
| Dimensions | 10-20 km |
| Mass | 3.1×1015 kg |
| Density | 2 ? g/cm³ |
| Surface gravity | 0.0040 m/s² |
| Escape velocity | 0.0076 km/s |
| Rotation period | 8.3? d 1 (http://obswww.unige.ch/~behrend/page5cou.html) |
| Spectral class | ? |
| Absolute magnitude | 12.3 |
| Albedo | 0.1 ? |
| Mean surface temperature | ~37 K |
(65407) 2002 RP120 holds the dubious distinction of being the most eccentric of the numbered asteroids (as of July 2004). It is also a member of the very exclusive group of retrograde asteroids, which has only two numbered members (the other one is 20461 Dioretsa). Its classification is uncertain, as it is at once a Damocloid (a highly eccentric, highly inclined object likely to be an extinct comet) and a scattered disk object (a Trans-Neptunian object with a very eccentric orbit, likely ejected from the ecliptic by Neptune).
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