Gravitation effect on a flux of sporadic micrometeoroids in the vicinity of near-Earth orbits

► The new approach to gravitation effect determination is proposed. ► The technique is based on integration of the equations of motion. ► The technique and results of calculation of the gravitational focusing factor are presented. ► The values of this coefficient depend on the initial velocity direction. ► The distribution of various directions relative to spacecrafts is non-uniform.