I figger we won’t see the one that gets us until it is too late. You may enjoy this, on Netflix.
https://www.netflix.com/title/81211003
Oh, we’ll know alright.
It will be discovered by amateur astronomers all over the Earth.
What will happen when word gets out that it will definitely hit us?
Total chaos and mayhem.
In every country, every city and every neighborhood.
We may not survive even before it hits...................
I have always wondered whatever happened to humans before the last Ice Age?
People were still humans 50,000 years ago and had to have shelter, food and clothing.
Yet we find no traces of civilizations anywhere older than about 5000 years ago - 10,000 max.............................