The meteor entered the atmosphere at 40,000 miles per hour. By comparison, the speed of the space shuttle was 17,000 mph.
Measuring about 50 feet wide, the meteor weighed about 7,700 tons, a little heavier than a U.S. nuclear-powered Los Angeles class submarine.
The energy released along its shallow trajectory was estimated to be about 300 to 500 kilotons, or the equivalent of 20 to 30 Hiroshima-sized bombs.
Although most of the meteor’s energy was consumed more than nine miles above the Earth’s surface, the resulting shockwaves collapsed roofs, shattered windows and injured some 1,200 people in Russia.
How to tell an asteriod from a meteorite
Asteroid A relatively small, inactive, rocky body orbiting the sun.
Comet A relatively small, at times active, object whose ices can vaporize in sunlight forming an atmosphere (coma) of dust and gas and, sometimes, a tail of dust and/or gas.
Meteoroid A small particle from a comet or asteroid orbiting the Sun.
Meteor The light phenomenon that results when a meteoroid enters the Earth's atmosphere and vaporizes; a shooting star.
Meteorite A meteoroid that survives its passage through the Earth's atmosphere and lands upon the Earth's surface.