January 10, 2013 - NASA Rules Out Earth Impact in 2036
NASA scientists revised the impact probability of Apophis to less than one in a million.
January 9, 2013 - Apophis Bigger Than Previously Thought
The Herschel Space Observatory discovered that Apophis is 325 meters (1,066 feet) wide, nearly 20 percent larger than the previous estimate. Its estimated mass increases to 47,250 metric tons.
December 30, 2009 - Russia Announces Apophis Project
Anatoly Perminov, the head of the Russian space agency, announced that a project to prevent Apophis from colliding with Earth was underway.
October 7, 2009 - NASA Downgrades 2036 Collision Probability
Using new techniques and data, NASA reduced its estimate of the probability of Apophis colliding with Earth in 2036 from 1 in 45,000 to 1 in 250,000.