The mineral composition of a near-Earth asteroid with a slight chance of striking our planet in 2036 has been determined for the first time. By analyzing sunlight reflected off its surface, scientists say the asteroid Apophis is a „good match“ for a rare type of stony meteorite known as a type LL chondrite. This group of space rocks represents just 7 percent of the known meteorites that fall to Earth.

http://www.space.com/4495-makeup-potentially-threatening-asteroid-determined.html