[RayChuang88]

We have thirty-one years before impact. That's way more than enough time to drop a lander with an ion rocket on it, land it on the asteroid, and fire the ion rocket for about a month to "nudge" the asteroid into a safe orbit. Or if technology is advanced enough by then, use a powerful enough rocket to slow down the asteroid to park it in the L1 gravitational zone between the Earth and Moon and start mining it out afterwards.

[NonValueAdded]

We have thirty-one years before impact. That's way more than enough time to drop a lander with an ion rocket on it... for TROP to build some nukes and Apophis will bounce the rubble.