Is there a way to calculate if an impact from a given asteroid (say 5 miles in diameter, solid rock to which we know the mass) would start an impact winter? If yes, I would like to see a real example of an existing asteroid, if possible some calculations, and the conclusion that an impact winter would be imminent.
I'm not sure if I'm not forcing the boundaries of available knowledge, but I would like to be able to understand and deduce if a given asteroid impact would start an impact winter. I know what that is, and I've read the Wikipedia article Impact winter. I'm interested in a specific example, if possible.