Components of the radiative accelerations acting on a r_a = 2 μm particle at the height of H = 1 cm on the equator of D = 1 km model asteroid as a function of longitude (local time), for a) olivine; b) magnetite. The black horizontal lines show the gravity (dashed) and the effective gravity taking the centrifugal acceleration into account (solid). The absolute value of is used as it is negative. Both a_⊙ and a_ref turn off almost immediately after Sunset, which causes the spiky feature of at longitude of 270°. a_ther persists throughout the night thanks to nonzero thermal inertia.