On a possible mechanism of particles falling affecting an asteroid shape and angular momentun evolution. A numerical simulation

The simulation is focused on the specific acting of gravitational field of a very elongated rotating asteroid on the location of zones of the most intensive bombardment with falling particles provided that initially these are resting and uniformly distributed in the space. The asteroid shape is approximated by a triaxial ellipsoid one. The computations and appropriate figures show that at rotation period faster than 7-9 hour (at values of the asteroid density of about 2 g/cm³ - 4 g/cm³ correspondingly) the leading sides of the asteroid receive higher flux than the trailing ones while at slower period the situation changes to the opposite. The zones of possible erosion are determined. The conclusion is made also that falling out of particles slows down an asteroid rotation.