This is what has Russia somewhat worried... A computer model, that's nowhere near accurate (because the orbit of the asteroid is a calculation, not entirely as precise as it could be w/o a tracking device on the rock). If the asteroid fell into Earth on the 2036 encounter these are the estimated landing points depending on where the Earth is rotated. As I said before, it's not exactly an accurate portrayal of what will happen that far out. They're using orbital simulation models. More precise information like how dense the object, if the rock is rotating, and what angle, are there any other objects nearby it might pass by to make slight changes in the rock's orbit... and like 10,000 other variables: