(85640) 1998 OX4
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| Discovery | |
|---|---|
| Discovered by | Spacewatch |
| Discovery date | July 26, 1998 |
| Designations | |
| MPC designation | (85640) 1998 OX4 |
| Minor planet category |
Apollo asteroid,[1][2] Earth crosser, Mars crosser |
| Orbital characteristics[2][3][4] | |
| Epoch April 18, 2013 (JD 2456400.5) | |
| Aphelion | 2.348437173 AU |
| Perihelion | 0.8124537 AU |
| Semi-major axis | 1.580445446 AU |
| Eccentricity | 0.4859337 |
| Orbital period | 1.986907 y (725.717659 d) |
| Mean anomaly | 91.719970° |
| Inclination | 4.51343° |
| Longitude of ascending node | 299.72307° |
| Argument of perihelion | 117.09683° |
| Physical characteristics | |
| Dimensions | 300-600 m[a][5] |
| Absolute magnitude (H) | 21.1[2] |
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(85640) 1998 OX4, also written 1998 OX4, is an Apollo asteroid and a Mars crosser. It was discovered on July 26, 1998 by the Spacewatch program and subsequently lost. It was re-discovered by the Near-Earth Asteroid Tracking (NEAT) project on August 31, 2002 as 2002 PJ34. It was removed from the Sentry Risk Table on 8 August 2002.[6] It has a well determined orbit with an observation arc of more than 10 years. It is included in the Minor Planet Center list of Potentially Hazardous Asteroids (PHAs) as it comes to within 0.05 AU of Earth periodically.
See also
Notes
- ^ This is assuming an albedo of 0.25–0.05.
References
- ↑ List Of Apollo Minor Planets
- ↑ 2.0 2.1 2.2 (85640) 1998 OX4 at the JPL Small-Body Database
- Discovery · Orbit diagram · Orbital elements · Physical parameters Retrieved 2013-03-19
- ↑ AstDys-2 on 1998 OX4 Retrieved 2013-03-19
- ↑ NEODyS-2 on 1998 OX4 Retrieved 2013-03-19
- ↑ Absolute-magnitude conversion table (H)
- ↑ "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. Retrieved 2014-02-01.
External links
- 1998 OX4 data at MPC
- List of Potentially Hazardous Asteroids (PHAs)
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