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The contact binary Kuiper Belt object (486958) Arrokoth, targeted by NewHorizons mission, has a unique slope pattern, which is a result of itsirregular bilobate surface shape and high spin period. Thus, some peculiartopographic regions on its surface are predisposed to lose or accumulatematerial, as a long circular depression feature, an impact crater calledMaryland, on its small lobe. The equilibrium points of Arrokoth are alsodirectly related to the structure of the environment near these surfacefeatures. In this work, we performed numerical simulations around Arrokoth toexplore the fate of particles close to equilibrium points and their dynamicalconnection with its surface features. Our results suggest that most of theseparticles in a ring inside the Arrokoth's rotational Roche lobe fall near theequatorial region of the Maryland impact crater or close to the Bright spotsarea on the large lobe. Also, particles in a spherical cloud orbiting Arrokothaccumulate preferentially near low-mid-latitudes regions close to thelongitudes of Maryland crater and Bright spots area. In contrast, a fewparticles will fall in regions diametrically opposite to them, as in theLL_Term boundary on the large lobe. High-latitudes are those more empty ofimpacts, as in polar sites. In addition, particles larger than a couple ofmicrons are not significantly perturbed by solar radiation pressure in theenvironment around Arrokoth.

The fate of particles in the dynamical environment around Kuiper Belt object (486958) Arrokoth