While the asteroid is about half the length of a football field, the exploding meteor “is probably about on the 15-yard line,” he said.
“Now that’s pretty big. That’s typically a couple times bigger than the normal influx of meteorites that create these fireballs,” he said in an interview on NASA TV.
“These fireballs happen about once a day or so, but we just don’t see them because many of them fall over the ocean or in remote areas. This one was an exception.”