Dust particle and solar radiation.

Influence of the solar radiation (electromagnetic and corpuscular - solar wind) on the motion of the interplanetary dust particle (IDP) is investigated. The ratio 'time of inspiralling toward the Sun: time of inspiraling neglecting the change of mass of the particle' is presented as a function of initial eccentricity for two cases of semi-major axis: 1. A(initial) = 3 AU approaches A(final) = 0.3 AU, 2. A(initial) = 1 AU approaches A(final) = 0.3 AU and for two different values characterizing the decrease of the IDP's size under the action of the solar wind.