It's also unlikely that this event would happen within 3, 000 miles of the Tunguska impact.

CNN: A meteor and asteroid: 1 in 100 million odds

If asteroids as big as DA14 pass close to Earth once every decade or two, and meteors as large as the Chelyabinsk one impact once every 100 years (a similar meteor having caused the Tunguska event in 1908), the chance of both events happening on any one day are indeed very small: 1 in 3, 650 days times 1 in 36, 500 days, or about 1 in 100 million -- not odds you would bet against.

CNN: A meteor and asteroid: 1 in 100 million odds