I believe that their target was still in it’s stable orbit, so they knew exactly where it was.
It could also have been still broadcasting some kind of signal that would allow it to be homed in on.
Thanks for the post. Someone else had said that the Chinese also shot theirs from a land based platform. Looks like we just showed the Chinese/Russians a thing or two about American ingenuity!!
For cryin out loud, even the English and French libbies were complaining about this mission. But if an asteroid is ever headed straight towards for their countries....who do you think they are going to call? (eye roll)