not sure.. there was a recent report or study that said it was possibly a 60 meter wide object, nobody knows for sure,, it also made light of a lot of the forest being diseased so it may have been more easily blown away .. one of those mysteries that is hanging tough.
it may have been shockwaves preceding the thing that actually did the damage and the object itself pretty much went poof as it flew thru the atmosphere.. thus not much to find physically..
Have you heard any more about the exploration of that small lake that is supposed to have been the impact site?