Disconcerting: Discovered 3 days *after* it passed 1/3 the moon's distance from Earth.
http://earthsky.org/space/asteroid-2017-oo1-close-pass-undetected
It was meeting with Russians?
>between 82 and 256 feet (between 25 and 78 meters)
>23,179 miles per hour (37,303 km/h)
If that hit in near a populated area it would have been devastating.
Edit:
Looks like someone on reddit did the math:
https://www.reddit.com/r/space/comments/6q0ekf/close_shave_from_an_undetected_asteroid/dktxhjq/
QuoteYou escape the air blast by being shock melted.
I love reddit.
If you are shock melted, you escape the air blast, AND you don't have to worry about the ear drum rupture. Seems like a good option. :D