The fireball lit up the sky over North America
Using eyewitness accounts, photographs, videos, and satellite data of the rock's fiery and dramatic entrance into the Earth's atmosphere, the researchers have also calculated where the meteorite came from.
Its trajectory indicates that the space rock originated from the middle of the asteroid belt which lies between the orbits of Mars and Jupiter (about 300 million to 600 million kilometres/186 million to 370 million miles from the Sun).
http://news.bbc.co.uk/2/hi/science/nature/968749.stm