Huge Asteroid Races Past Earth

PASADENA, Calif. (AP) - An asteroid about the size of one that
leveled more than 800 square miles of forest in Siberia a century
ago just buzzed the Earth.

The asteroid named 2009 DD45 was about 48,800 miles from Earth
when it zipped past early Monday, NASA's Jet Propulsion Laboratory

That is just twice as high as the orbits of some
telecommunications satellites and about a fifth of the distance to
the Moon.

"This was pretty darn close," astronomer Timothy Spahr of the
Harvard-Smithsonian Center for Astrophysics said Wednesday.

But not as close as the tiny meteoroid 2004 FU162, which came
within 4,000 miles in 2004.

The space rock measured between 69 feet and 154 feet in
diameter. The Planetary Society said that made it about the same
size as the asteroid that exploded over Siberia in 1908.

Scientists at the Siding Spring Observatory in Australia spotted
2009 DD45 and began tracking it in late February when it was about
1 million miles away.

Spahr said he knew within an hour of that discovery that it
would pose no threat to Earth.

Of the known space rocks, the next time an object will get
closer to Earth will be in 2029 when an 885-foot asteroid called
99942 Apophis comes within 20,000 miles, said Donald Yeomans of
NASA's Near-Earth Object Program at the Jet Propulsion Laboratory
in Pasadena.

Last year, the asteroid 2008 TC3 harmlessly burned up in Earth's
atmosphere over Africa 19 hours after it was discovered.
Astronomers gave a six-hour notice warning of that fiery plunge.
On the Net:
NASA's Near-Earth Object Program:

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