Aphophis at the size of a mountain sounds like something we ought to begin work on yesterday for the 2029 pass. 1 in 250,000 or whatever is too damn large for me. I will be pretty old then but hopefully still on the “right side of the grass” as my dad used to say. I have ten grandchildren and they will all be young and enjoying life and I hope it stays that way.
It's better to be safe than sorry, I wholeheartedly agree. It's 1,210 feet in diameter (not a sphere, more of a turd shape) and it's probably a loose aggregation of smaller chunks, but that would definitely leave a mark as it arrived like a shotgun blast with an assumed mass of 671,000,000 tons, kind of a lot, really. It would be a big owie.