What the derp?

Of course it's an experiment. It hasn't be done before. There are a lot of unknowns, namely what's the exact mass of that rock? How much energy will the impacter actually transfer to the asteroid, and how much will be lost to top layers of the rock fracturing and flying off into space?

All of the data on it's course is available to you. If you want to start learning orbital mechanics now, you should be good to go by 2015.

H.