Estimating the origin and composition of the body matrix of 2013 Chelyabinsk bolide

Based on preliminary measurements of Chelyabinsk bolide trajectory we estimated conditions of bolide disintegration. The bolide body was shown to be ice matrix with meteorite matter intrusions. With the assumption that the Chelyabinsk bolide body is the fragment of second generation cometary nucleus, the forecast has been made that radioisotopic age of meteorites found after the fall is more than 4 billion years, and the exposition age (the time of exposure by cosmic rays) has to be zero. We assumed that large bodies such as cometary nucleus fragments can be a part of meteor and bolide swarms, although the direct relationship between Chelyabinsk bolide orbit and orbits of well-known meteor streams was not found. The inspection of their orbits can provide an early detection of bodies of Chelyabinsk bolide type or of higher type.