 Flyby of asteroid 2004 FH [a] | |
| Discovery[1][2] | |
|---|---|
| Discovered by | LINEAR |
| Discovery site | Lincoln Lab's ETS |
| Discovery date | 16 March 2004 |
| Designations | |
| 2004 FH | |
| 2004 FH | |
| NEO · Aten[1] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 5 | |
| Observation arc | 3 days |
| Aphelion | 1.0545 AU |
| Perihelion | 0.5816 AU |
| 0.8180 AU | |
| Eccentricity | 0.2891 |
| 0.74 yr (270 days) | |
| 302.96° | |
| 1° 19m 55.56s / day | |
| Inclination | 0.0210° |
| 290.98° | |
| 36.622° | |
| Earth MOID | 0.00002265 AU 0.0088 LD · (3390 km) |
| Physical characteristics | |
| Dimensions | 24 m (calculated)[3] 30 m (estimate)[4] |
| 0.0504 h (3.02 min)[3] | |
| 0.20 (assumed)[3] | |
| S (assumed)[3] | |
| 25.7[1] | |
2004 FH is a micro-asteroid and near-Earth object of the Aten group, approximately 30 meters in diameter, that passed just 43,000 km (27,000 mi) above the Earth's surface on 18 March 2004, at 22:08 UTC. It was the 11th closest approach to Earth recorded as of 21 November 2008[update].[b] The asteroid was first observed on 16 March 2004, by astronomers of the Lincoln Near-Earth Asteroid Research at the Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico.[2]
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