Meteoroid

Meteoroid that hit the atmosphere was one of near-Earth objects , and was part of a group of Apollo. The property has not been spotted by astronomers before its collapse . Its size was too small to be a good chance to discover it in the context of the space programs of observation , tracking movements of objects near Earth and potentially dangerous objects ( however, in 2008, discovered 2 -meter meteoroid 2008 TC3 for about 20 hours before it hit the Earth ) . In addition, a meteoroid came from the sun , making it more difficult to see it when approaching the Earth.

Collisions with Earth meteoroids are not uncommon . It is estimated that the daily flows in the Earth's atmosphere about 274 tons of space ( 108kg per annum ) , but most of these events go unnoticed because they are very small grains of rock . Larger meteoroids with a diameter of up to ten meters collide with the Earth at about an hour , but these events usually go unnoticed unless they occur over densely populated areas . Collisions of meteoroids of this size , as Chelyabinsk occur statistically according to various estimates of tens to 100 years , but about sizes larger than 100 meters - no more than a thousand years. Astronomers estimate that the same group of Apollo is located about 80 million objects the size of meteoroidu , which disintegrated over Russia .

The event coincided with the passage of near-Earth asteroid 2012 DA14 more . According to most surveys, including those from the European Space Agency , NASA , Sodankylä Geophysical Observatory and Russian sources , between the two objects is not related . In relation to the earth's surface in 2012 DA14 was moving toward the north , and the car Ural was directed approximately to the west.

Published in 2013 by computer analysis using the Monte Carlo method , superbolid could be discovered in the 2011 asteroid 2011 EO40 .