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PostSubject: NASA scrambles for better asteroid detection   Mon Feb 18, 2013 8:41 pm

AFP - NASA, universities and private groups in the US are working on asteroid warning systems that can detect objects from space like the one that struck Russia last week with a blinding flash and mighty boom.

But the US space agency reiterated that events like the one in the Urals, which shattered windows and injured nearly 1,000 people, are rare.

"We would expect an event of this magnitude to occur once every 100 years on average," said Paul Chodas of NASA's Near-Earth Object Program Office at the Jet Propulsion Laboratory in Pasadena, California.

NASA estimates that before entering the Earth's atmosphere above Russia, the asteroid measured 17 meters (56 feet) in diameter and weighed 10 tons.

Fragments of the asteroid caused an explosion equivalent to 500,000 tons of TNT when they hit.

The same day, a 45-meter in diameter asteroid known as 2012 14 whizzed harmlessly past the Earth, its passage overshadowed by the bright arc drawn across the Russian sky that same day.

But had it hit ground, 2012 DA14 could have obliterated a large city.

Ten years ago, NASA would not have been able to detect 2012 DA14, said Lindsey Johnson, near earth object (NEO) project manager at NASA said recently.

more here: http://www.france24.com/en/20130218-nasa-scrambles-better-asteroid-detection

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