And I cannot believe that with modern targeting computers we would miss. It’s not like that thing will take evasive action.
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That was my first thought too: use an ICBM. But how far up can one of those babies go? If it can’t reach very far, then you’re pulverizing the rock pretty close to Earth. Would that put a giant dust cloud into our atmosphere? Would that become another “Year Without Summer?” Or (I’m not a scientist, I just like science fiction! LOL!) could an exploding ICBM high in the atmosphere knock out electronics, etc.? Perhaps the ICBM scenario is not workable after all.
The average volcano eruption dumps more dirt into the atmosphere than a rock that size would ever do if nuked. Plus the nuke would literally vaporize a good portion of it assuming a direct hit.
I’m sure there would be some negatives, but they all beat the impact scenario.
ICBM’s can’t even get into orbit.