The dependence of the YORP effect on an asteroid shape

U. V. Pyrohova, O. A. Golubov


In this paper we deal with the problem of analytic calculation of the YORP effect of an asteroid in terms of itsshape. The calculations are made for spheroidal asteroids, whose shape slightly differs from a triaxial ellipsoid.We analytically describe a real asteroid as a triaxial ellipsoid perturbed with spherical harmonics. The results canbe applied to predict the YORP torque for asteroids with specified shape, as well as to understand contribution of roughness on different scales to the YORP effect.


asteroids; YORP effect


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