4:15 PM - 4:30 PM
[PPS03-03] Constraints on global distribution of regolith deposits on the asteroid 162173 Ryugu
Keywords:Ryugu, regolith, gravitational potential
In this report, we will investigate distributions of the gravitational potential and inferred regolith deposits on the asteroid Ryugu with our model. Ryugu is a target of the Japanese asteroid exploration mission Hayabusa2. The distribution of regolith deposits on the asteroid is of interest not only scientifically but also from the engineering point of view because regions with smooth regolith deposits could be candidates for safe landing sites of the spacecraft. The total amount of regolith produced by impact events on Ryugu is estimated with an ejecta velocity distribution model by Michikami et al. (2007). Then the distribution of the effective gravitational potential field on the asteroid is explored. The latest information on physical properties of Ryugu including the shape and the rotation period are provided by Müller et al. (2016).