Hi, thank you for detailed scientific explanation.
You seem to know a lot about Astrophysics about which I am totally unfamiliar with.
Referring to Armageddon, I remembered that they intended to ”split" the asteroid by explosion, and its broken pieces narrowly miss the Earth(if it was done in time). And that critical timing was named Zero Barrier.
In the world we live in, 6000km something is a huge distance.
But on a cosmic scale, it looks fairly tiny figure, doesn't it?
And it determines the fate of our world.