Single Status Update
Well that was close...
Closest approach was 2,900km and we didn't even see it until 6 hours after it went by. Probably 3-6m in diameter (about 1/3rd the size of the Chelyabinsk meteor) and travelling at 12.4km/second. Definitely would have made some noise and got people's attention.
The size was a factor, and also the trajectory. It came in from the sunward side. It was both smaller and slower than Chelyabinsk so in terms of energy this was probably less than a quarter of that. Though that one was maybe up to 500kilotons so even that much would have been significant. The first atomic bombs were "only" around 10-20kiltotons.