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Action of solar wind on arbitrarily shaped interplanetary dust particle isinvestigated. The final relativistically covariant equation of motion of theparticle contains both orbital evolution and change of particle's mass.Non-radial solar wind velocity vector is also included. The covariant equationof motion reduces to the Poynting-Robertson effect in the limiting case whenspherical particle is treated, the speed of the incident solar wind corpusclestends to the speed of light and the corpuscles spread radially from the Sun.The results of quantum mechanics have to be incorporated into the physicalconsiderations, in order to obtain the limiting case. The condition for thesolar wind effect on motion of spherical interplanetary dust particle is$\vec{p}'_{out}$ $=$ (1 $-$ $\sigma'_{pr} / \sigma'_{tot}$) $\vec{p}'_{in}$,where $\vec{p}'_{in}$ and $\vec{p}'_{out}$ are incoming and outgoing radiationmomenta (per unit time) measured in the proper frame of reference of theparticle; $\sigma'_{pr}$ and $\sigma'_{tot}$ are solar wind pressure and totalscattering cross sections.  Real flux density of solar wind energy produces shift of perihelion ofinterplanetary dust particles. This result significantly differs from thestandard treatment of the action of the solar wind on dust particles, whenanalogy with the Poynting-Robertson effect is stressed. Moreover, the evolutionof the shift of perihelion depends on orbital position of the parent body atthe time of ejection of the particle.

Solar wind and motion of dust grains