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Asteroid 2012 DA14

Asteroid 2012 DA14

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View bigger - Asteroid 2012 DA14 for Android screenshot
View bigger - Asteroid 2012 DA14 for Android screenshot
2012 DA14 is a near-Earth asteroid with an estimated diameter of about 45 meters (148 ft) and an estimated mass of about 130,000 metric tons. It was discovered on February 23, 2012, by the OAM Observatory, La Sagra in Spain seven days after passing (2,600,000 km; 1,620,000 mi) from Earth on February Calculations show that on February 15, 2013, the distance between the asteroid and Earth will be 0.000228 AU (34,100 km; 21,200 mi). The 2013 passage of 2012 DA14 by Earth is a record close approach for a known object of this size.

Risks

The asteroid will not impact Earth on February 15, 2013. The uncertainty region of 2012 DA14 during planetary encounters is well determined through 2134.
2012 DA14 was removed from the Sentry Risk Table on 7 February 2013.[11] There is no risk of impact in the next hundred years.
It is estimated that there are more than a million near-Earth asteroids smaller than 100 meters.

If it were to hit Earth in the distant future, it is estimated that it would enter the atmosphere at 12.7 km/s, and produce an air burst with the equivalent of 2.4 megatons of TNT[4] at an altitude of roughly 10 kilometers (33,000 ft).[14] The Tunguska event has been estimated at 3-20 megatons.[15] Asteroids about 50 meters in diameter are expected to impact Earth once every 1200 years or so.[16] Such an impact could be a city-killer, as asteroids larger than 35 meters across can pose a threat to a town or city.

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Comments and ratings for Asteroid 2012 DA14
  • (54 stars)

    by Marlboro Light on 10/02/2013

    I saw all about the asteroid on TV, but after reading about it here, it answered a lot of my questions. The app does what it says and therefore I give it 5* and a big thank you to the author.