Half-baked queston....

Last evening it occured to me that the astroid that hit Russia recently came in at a specific angle relative to our polar axis. Knowing the date and time it would seem to me that with modern astronomy programs(I don't have one) we should be able to go back to that date/time, and using the angle of impact determine what region of the sky it came from roughly....(due to suns gravitational field.). Then going back into recent history or prehistory see if there is further evidence of astrooids coming from a definite area of the sky. I am and have been consumed for a long time with the K-T event 65 MYA(Iridium layer)...and am suggesting that many of the "NEAR EARTH OBJECTS"(NEO's)...that present a real or potential danger to Earth may have a common SOURCE of higher probability. Again all of this is a half-baked thought...that might be worth pursuing... There was recent evidence of another hit in Africa I believe, if such information was organized and researched we might have a better idea of where to look for the higher probability astroids....which will trash all of our beautiful telescopes in a matter of seconds/hours and us with it. -LarryS.