(12538) 1998 OH
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| Discovery[1] and Designation | |
|---|---|
| Discovered by: | NEAT |
| Discovery date: | 1998-07-19 |
| Alternative names: [2] | none |
| Minor planet category: | Main belt |
| Orbital characteristics[3] | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion distance: | 324.262 Gm (2.168 AU) |
| Perihelion distance: | 136.964 Gm (0.916 AU) |
| Semi-major axis: | 230.613 Gm (1.542 AU) |
| Eccentricity: | 0.406 |
| Orbital period: | 699.095 d (1.91 a) |
| Avg. orbital speed: | 22.97 km/s |
| Mean anomaly: | 209.975° |
| Inclination: | 24.515° |
| Longitude of ascending node: | 220.817° |
| Argument of perihelion: | 321.621° |
| Physical characteristics | |
| Dimensions: | ~3 km |
| Mass: | ~2.8×1013 kg |
| Mean density: | 2.0? g/cm³ |
| Equatorial surface gravity: | ~0.0008 m/s² |
| Equatorial Escape velocity: | ~0.0016 km/s |
| Sidereal rotation period: | ? d |
| Axial tilt: | ?° |
| Pole ecliptic latitude: | ? |
| Pole ecliptic longitude: | ? |
| Geometric albedo: | 0.10? |
| Temperature: | ~224 K |
| Spectral type: | ? |
| Absolute magnitude: | 16.1 |
(12538) 1998 OH is an earth-crosser asteroid that was discovered in 1998. It has a diameter of 2-4 kilometers[1], and is expected to pass close to the Earth in 2042 and 2132. [4]
[edit] References
- ^ 12538 1998 OH in the EARN Near-Earth Asteroids Data Base
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