(357439) 2004 BL86
(357439) 2004 BL86 is a bright sub-kilometer asteroid and binary system, classified as near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 300 meters (980 ft) in diameter. It was discovered on 30 January 2004 by astronomers of the Lincoln Near-Earth Asteroid Research at Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico. Its 70-meter (200 ft) moon was discovered during the asteroid's close approach to the Earth in January 2015.
Goldstone radar image of 2004 BL86 and its minor-planet moon | |
| Discovery | |
|---|---|
| Discovered by | LINEAR |
| Discovery site | Lincoln Lab's ETS |
| Discovery date | 30 January 2004 |
| Designations | |
MPC designation | (357439) 2004 BL86 |
Minor planet category | NEO · PHA · Apollo |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 4,863 d (13.31 yr) |
| Aphelion | 2.1070 AU |
| Perihelion | 0.8974 AU |
Semi-major axis | 1.5022 AU |
| Eccentricity | 0.4026 |
Orbital period (sidereal) | 673 d (1.84 yr) |
Mean anomaly | 169.27° |
Mean motion | 0° 32m 7.08s / day |
| Inclination | 23.775° |
Longitude of ascending node | 126.69° |
| 311.45° | |
| Known satellites | 1 |
| Earth MOID | 0.0092 AU (3.6 LD) |
| Physical characteristics | |
Mean diameter | 0.263±0.026 km 0.290±0.030 km 0.325±0.025 km |
Synodic rotation period | 2.620±0.001 h 2.6205±0.0003 h 2.637±0.024 h |
| 0.40 0.40±0.08 | |
| V | |
| 19.05 19.3 19.51±0.02 | |
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