On Feb. 15, the Urals region of Russia played host to a noisy cosmic visitor. A meteor entered the atmosphere and broke up over the city of Chelyabinsk, generating powerful shockwaves that slammed into the city, blowing out windows, causing 1,500 injuries and millions of dollars-worth of damage. Before it collided with Earth, however, the Chelyabinsk space rock was a 10,000 ton meteoroid and astronomers now think they know where it came from.
PHOTOS: Russian Meteor Strike Aftermath
Helped by the extensive coverage of eyewitness cameras, CCTV footage and a fortuitous observation made by the Meteosat-9 weather satellite, Jorge Zuluaga and Ignacio Ferrin of the University of Antioquia in Medellin, Colombia, have been able to reconstruct the most likely orbit of the space rock around the sun before the Earth got in its way. What's more, they know what type of space rock it was.
Using video evidence (most of which had precise timestamps), the location, speed and altitude of the fireball could be estimated. Add to that the location where a suspected meteorite fragment punched a hole into the ice of Lake Cherbakul and it's a case of using some simple math to learn the characteristics of the object. But to trace the meteoroid's path back out into space and assemble its orbital trajectory around the sun wasn't so straight forward, according to the arXiv blog.