Everything about 2004 Fh totally explained
2004 FH is a
near-Earth asteroid that was discovered on
March 15,
2004 by the
NASA-funded LINEAR asteroid survey. The object is roughly 30 metres in diameter and passed just 43,000 km (26,000 miles) above the
Earth's surface on
March 18,
2004 at 22:08
UTC; making it the
fourth or fifth closest approach to Earth recorded
as of 2006 (see the diagram below). For comparison,
geostationary satellites orbit Earth at 35,790 km.
2004 FH is an
Aten family asteroid, although by some definitions it should be called a
meteoroid, since it's smaller than 50 metres in diameter. 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 ground level effect. Despite its relatively small size (about 30 metres), it's still the third largest asteroid detected coming closer to the Earth than the Moon.
The asteroid won't make another close approach to Earth until
2044 when it'll be no closer than 1.4 Gm (1.4 million kilometres). 2004 FH also has the distinction of having the lowest
inclination of any known near-earth asteroids.
Further Information
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