3 ms·

I think in this case it's referring to how early the asteroid was detected. Either it travelled so fast or our detection of asteroids is poor, because we only j

I think in this case it's referring to how early the asteroid was detected. Either it travelled so fast or our detection of asteroids is poor, because we only just detected it before it passed us.

ksaj 7y ago
It was coming from the general direction of the sun. Nobody could see it until it got really close.