On June 30, 1908 at about 0h 14.5m UTC what is known today as the Tunguska
Event (TE) occurred, most likely caused by the fall of a small rocky asteroid
of about 50-60 meters in diameter over the basin of the Tunguska River (Central
Siberia). Unfortunately the first expedition was made by Kulik 19 years after
the event and macroscopic meteorites have never been found in epicenter site.
After considering the Chelyabinsk event as a guide, because it is the most
energetic impact event observed after TE, we estimated the strewn field of
possible macroscopic fragments of the asteroid responsible of the TE: we have
reason to believe that there might be fragments with enough strength to survive
the airburst and reach the ground. The strewn field, which is located about 16
to 19 km North-West from the epicenter, should be considered for the search of
macroscopic bodies, even if the mud and vegetation could have made any trace
disappear. Cheko Lake, which by some authors is considered an impact crater,
falls several km outside these areas and, based on our results, it is unlikely
that it could be a real impact crater: only if the cosmic body's trajectory had
an azimuth of about 150ββ180β would be in the strewn field area,
but it is not consistent with the most likely trajectory.Comment: 13 pages, 5 figures, draft of a work in progres