At www.sciencedaily.com/releases/2013/11/131106164150.htm … there is a report on research done of the airburst event on February 15th 2013 and it claims to have revolutionised scientists' understanding of the phenomenon. The report, by Peter Jennisken in the journal Science (Nov 7th), following a field study led by Olga Popova of the Russian Academy of Sciences in Moscow, has worked out the meteor was travelling at 19km a second and fragmented as it entered the atmosphere, peaking at 30km above the surface. At that point the light from the meteor appeared to be brighter than the Sun – even from 100km away. Due to extreme heat many of the pieces vapourized before falling out of what became a glowing orange cloud of debris. Some 900 to 13000 pounds of meteorites are calculated to have reached the ground, including one fragment 1400 pounds in weight retrieved from Lake Chebarkal in October.
The same story is at http://phys.org/print302965253.html … the explosed was equivalent to 600,000 tons of TNT. Popova expalined the different terms used – a meteoroid being the original object, the meteor the shooting star seen in the sky, and the meteorite is the object that reached the ground. No mention is made of a possible relationship with the larger asteroid that passed close to the Earth at the same time.