I thought it was a comet which exploded in the air?
The Soviet scientitsts “proved” as much.
Whatever the impactor, if this rock chunk turns out to be part of it, the mid-air explosion idea will probably win out. The Barringer Crater/Meteor Crater in Arizona is 3/4 a mile across while the impactor was a hunk of stone about 75 feet across. On impact, the impactor (as well as about the same mass of the surface of the Earth) basically vaporized, with some of it condensing in the vicinity.