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Well that was close...
https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2020 QG;old=0;orb=1;cov=0;log=0;cad=1#cad
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.
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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.
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