- The meteoroid likely started out being about 19 meters in diameter, around 62 feet, and had a mass of 12,000 to 13,000 tons. It entered the atmosphere at a speed of more than 40,000 miles per hour.
- The first shock wave formed at 55 miles above the surface.
- 19 miles above the surface, the meteor peaked in heat and brightness, shining brighter than the sun for people up to 62 miles away. The explosion was equal to about 500,000-600,000 tons of TNT.
- An impact from as long as 4.4 billion years ago created shock veins in the asteroid, making it easier for the rock to break apart.
- 9,000 to 13,000 pounds of meteorite fell to the ground, including the 1,400 pound fragment found in Lake Chebarkul. More than 75 percent of the rock evaporated.
- That biggest fragment created a 23-foot-wide hole in the ice covering Lake Chebarkul, which was more than 2 feet thick at the time.
What We Now Know About The Chelyabinsk Meteor
A set of newly released papers reconstruct the fireball's impact.