2004 FH
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| Lua error in package.lua at line 80: module 'Module:InfoboxImage/data' not found. Flyby of asteroid Template:Mp;[a] the object that flashes by is a man-made satellite. | |
| Discovery[1][2] | |
|---|---|
| Discovered by | LINEAR |
| Discovery site | Lincoln Lab's ETS |
| Discovery date | 16 March 2004 |
| Designations | |
| 2004 FH | |
| NEO · Aten[1] | |
| Orbital characteristics[1] | |
| Epoch 21 Nov 2025 (JD 2461000.5) | |
| Uncertainty parameter 1 | |
| Observation arc | 6184 days (16.93 years) |
| Aphelion | 1.0559 AU |
| Perihelion | 0.5826 AU |
| 0.8193 AU | |
| Eccentricity | 0.2888 |
| 0.7415 yr (270.84 days) | |
| 333.74° | |
| Template:Deg2DMS / day | |
| Inclination | 0.0549° |
| 258.20° | |
| 69.180° | |
| Earth MOID | 0.000484 AU |
| Physical characteristics | |
| Dimensions | 24 m (calculated)[3] 30 m (estimate)[4] |
| Template:Cvt[3] | |
| 0.20 (assumed)[3] | |
| S (assumed)[3] | |
| 25.7[1] | |
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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]
Orbit and classification
Template:Mp is an Aten asteroid. It passed 43,000 km from the Earth on 18 March 2004. For comparison, geostationary satellites orbit Earth at 35,790 kilometers. Despite its small size, it is still the fourth-largest asteroid detected coming closer to the Earth than the Moon.
Had this object hit Earth, it would probably have detonated high in the atmosphere. It might have produced a blast measured in hundreds of kilotons of TNT, but may not have produced any effect on the ground. It could also have been an Earth-grazing fireball if it had been much closer but not close enough to impact.[citation needed]
On 17 March 2044 the asteroid will pass no closer than 0.0116 AU (1.74 million km; 1.08 million mi) from the Earth.[5] Template:Mp also has the distinction of having the lowest inclination of any known near-Earth asteroids.
Two weeks later another asteroid approached even closer, Template:Mpl, which was smaller; and a few years later Template:Mpl, which was closer in size, passed by at similar distance.
Physical characteristics
Template:Mp is an assumed stony S-type asteroid.[3]
Rotation period
In March 2004, two rotational lightcurves of Template:Mp were obtained from photometric observations by astronomers Petr Pravec, Stefano Sposetti and Raoul Behrend. Lightcurve analysis gave a rotation period of 0.0504 hours (3.02 minutes) with a brightness amplitude of 1.16 and 0.75 magnitude, respectively (U=3/2+).[3][6]
This makes this object a fast rotator, currently among the Top 100 known to exist. The photometric observations also revealed that Template:Mp is a tumbler with a non-principal axis rotation.[3]
Diameter and albedo
2004 FH has been estimated to measure approximately 30 meters (98 feet) in diameter.[4] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 24 meters based on an absolute magnitude of 25.7.[3]
Notes
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- ^ Flyby of asteroid 2004 FH (center dot being followed by the sequence). The other object that flashes by is an artificial satellite. Images were taken by Stefano Sposetti and composited by Raoul Behrend of Geneva Observatory.
- ^ Rankings depend on definitions of meteoroid and approach. The 2–10 m 1972 grazer was at 57 km, the 44 kg 1990 grazer was about 100 km, possible 2006 grazer size and altitude not available. See List of asteroid close approaches to Earth.
References
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- ^ a b c d Page Module:Citation/CS1/styles.css has no content."JPL Small-Body Database Browser: (2004 FH)" (2004-03-19 last obs.). Jet Propulsion Laboratory. Retrieved 23 November 2017.
- ^ a b Page Module:Citation/CS1/styles.css has no content."2004 FH". Minor Planet Center. Retrieved 23 November 2017.
- ^ a b c d e f g h Template:Cite LCDB
- ^ a b Page Module:Citation/CS1/styles.css has no content.Chesley, Steven R.; Chodas, Paul W. (17 March 2004). "Recently Discovered Near-Earth Asteroid Makes Record-breaking Approach to Earth". NASA's Near Earth Object Program Office. Retrieved 23 November 2017.
- ^ Page Module:Citation/CS1/styles.css has no content."JPL Close-Approach Data: (2004 FH)" (last observation: 2004-03-19; arc: 3 days; uncertainty: 3). Retrieved 23 March 2016.
- ^ Page Module:Citation/CS1/styles.css has no content.Behrend, Raoul. "Asteroids and comets rotation curves – (2004 FH)". Geneva Observatory. Retrieved 23 November 2017.
External links
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- MPEC 2004-F24
- Images of 2004 FH at Klet
- Asteroid Lightcurve Database (LCDB), query form (info Script error: No such module "webarchive".)
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Template:NeoDys
- Template:ESA-SSA
- 2004 FH at the JPL Small-Body DatabaseTemplate:Edit at Wikidata
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