  The determination of the trajectory of Chelyabinsk bolide according to the
video records is performed and the results of the simulation of the fragment
motion in the atmosphere are showed including its state at that moment. The
methods of distortion compensation and adjusting of the video images with the
calibration images and the iterative method of the trajectory improvement by
azimuths and altitudes are developed. These methods allow improving the
precision of the trajectory tracing to the hundreds of meters in space and to
the tens of arc minutes in the angular measure.
