They had thought this thing was 10 tons, now 10,000 tons? Quite a difference. We are lucky it exploded at 15 miles up. They couldn’t see it because it approached Earth from the direction of the sun. The article says it is the smaller ones they can’t detect, but I have to believe they can be well larger than this and go unseen.
Doesn’t 10,000 tons sound a little high for a rock 45 ft. across? I don’t know how to do the math to determine the density for that. Yet they say it wasn’t ‘dense’ like nickel or iron.
They caught the thing on camera. That adds ten pounds right off the bat.