Latest On Apophis 2004
Makeup of Potentially Threatening Asteroid Determined
Apophis is currently about 158 million miles (254 million kilometers) from Earth and will not be visible again for several years. On Apr. 13, 2029, it will pass within 22,000 miles (35,000 kilometers) of Earth, but there is a small possibility—about one chance in 45,000—that it could be on a collision course with our planet when it comes by again in 2036.
http://www.space.com/scienceastronomy/071015-apophis-makeup.html