2004 FH

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2004 FH
Synodic rotation period
0.0504 h (3.02 min)[3]
0.20 (assumed)[3]
S (assumed)[3]
25.7[1]

2004 FH is a micro-

Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico.[2]

Orbit and classification

Trajectory of 2004 FH in the Earth–Moon system

2004 FH is an

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

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 (1,740,000 km; 1,080,000 mi) from the Earth.

inclination
of any known near-Earth asteroids.

Two weeks later another asteroid approached even closer, 2004 FU162, which was smaller, and a few years later 2009 DD45, which was closer in size passed by at similar distance.

Physical characteristics

2004 FH is an assumed stony S-type asteroid.[3]

Rotation period

In March 2004, two rotational

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 2004 FH is a tumbler with a non-principal axis rotation.[3]

Diameter and albedo

has been estimated to measure approximately 30 meters (100 feet) in diameter.

albedo for stony asteroids of 0.20 and calculates a diameter of 24 meters based on an absolute magnitude of 25.7.[3]

Notes

  1. Raoul Behrend of Geneva Observatory
    .
  2. ^ 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

  1. ^ a b c d "JPL Small-Body Database Browser: (2004 FH)" (2004-03-19 last obs.). Jet Propulsion Laboratory. Retrieved 23 November 2017.
  2. ^ a b "2004 FH". Minor Planet Center. Retrieved 23 November 2017.
  3. ^ a b c d e f g h "LCDB Data for (2004)". Asteroid Lightcurve Database (LCDB). Retrieved 23 November 2017.
  4. ^ a b Steven R. Chesley; Paul W. Chodas (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.
  5. uncertainty
    : 3). Retrieved 23 March 2016.
  6. ^ Behrend, Raoul. "Asteroids and comets rotation curves – (2004 FH)". Geneva Observatory. Retrieved 23 November 2017.

External links

Wikimedia Commons has media related to 2004 FH.


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