Relying on videos of the meteor as it streaked across the sky over the Ural mountains, a pair of Colombian astronomers say they have reconstructed the space rock's orbit.
Relying on videos of the meteor from Chelyabinsk's Revolutionary Square and in the nearby city of Korkino, astronomers Jorge Zuluaga and Ignacio Ferrin at the University of Antioquia in Medellin, Colombia, triangulated the speed and position of the meteorite as it fell to Earth.
Zuluaga and Ferrin's conclusion rests on the assumptions that a 20-foot hole in the ice of Lake Chebarkul was caused by a fragment of the meteor, and that this fragment was traveling along the same trajectory as its parent body. Divers have yet to find a meteorite in the lake.
The pair were inspired by blogger Stefan Geens, who analyzed video of the shadows cast by light poles in Revolutionary Square as the blazing meteor passed overhead. Using simple trigonometry, Geens estimated the path of the meteor, noticing that it squared nicely with an image of the meteor's contrail that just happened to have been picked up by a European weather satellite.