Asteroid Apophis may strike Earth in 2068: Scientists
PTI: Washington, Feb 26 2013, 21:14 IST
by the so-called Yarkovsky effect, a subtle non-gravitational perturbation due to thermal re-radiation of solar energy absorbed by the asteroid.
Notably, the potential impact in 2036 that had previously held the highest probability has been effectively ruled out since its probability has fallen to well below one chance in one million.
"Only one of the potential impacts has a probability of impact greater than 1-in-a-million, there is a 2-meter wide keyhole that leads to an impact in 2068, with impact odds of about 2.3 in a million," scientists said in the article.
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