Looking at the comments at: http://ogleearth.com/2013/02/reconstructing-the-chelyabinsk-meteors-path-with-google-earth-youtube-and-high-school-math/ This one is from Korkino, close to Rosa/Roza (54.890703,61.398983): http://www.youtube.com/watch?v=odKjwrjIM-k - Robin