Travelers In The Night

A stony asteroid 130m or about 430 feet in diameter has a mass of 3 billion Kg or 6.5 billion pounds. Such an object is likely to strike the Earth every 11,000 years or so creating a crater a mile in diameter crater and inflicting damage over a hurricane sized footprint on the surface of our planet. If one like this were found to be heading straight for us deflecting it would take some ingenuity. The key is early discovery so that perhaps a gentle nudge would do the trick. How do do we test such an idea before we are in a situation where the test occurs on an incoming impactor where failure is not a good option?