Astronomers from the University of Antioquia in Medellin, Colombia, have traced the origin of the meteor that hit central Russia earlier this month, injuring about 1,000 people. They used the numerous amateur videos that were taken when the meteor hit the city of Chelyabinsk to piece together the meteor’s route through the Earth’s atmosphere. Camera phones, CCTV and car-dashboard cameras, and traffic footage with date stamps were used to track the trajectory of the meteor that blew out windows and rocked buildings across the Russian city. U.S. space agency NASA has estimated that the meteor’s mass came to between 7,000 and 10,000 tons, with a size of about 55ft.
BBC News - Russia meteor's origin tracked down