2004 FH
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. 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.
Flyby of asteroid 2004 FH | |
| Discovery | |
|---|---|
| Discovered by | LINEAR |
| Discovery site | Lincoln Lab's ETS |
| Discovery date | 16 March 2004 |
| Designations | |
MPC designation | 2004 FH |
Alternative designations | 2004 FH |
Minor planet category | NEO · Aten |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 5 | |
| Observation arc | 3 days |
| Aphelion | 1.0545 AU |
| Perihelion | 0.5816 AU |
Semi-major axis | 0.8180 AU |
| Eccentricity | 0.2891 |
Orbital period (sidereal) | 0.74 yr (270 days) |
Mean anomaly | 302.96° |
Mean motion | 1° 19m 55.56s / day |
| Inclination | 0.0210° |
Longitude of ascending node | 290.98° |
| 36.622° | |
| Earth MOID | 0.00002265 AU 0.0088 LD · (3390 km) |
| Physical characteristics | |
| Dimensions | 24 m (calculated) 30 m (estimate) |
Synodic rotation period | 0.0504 h (3.02 min) |
| 0.20 (assumed) | |
| S (assumed) | |
| 25.7 | |
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