Article Title

Modeling and analysis of Hayabusa2 touchdown


contact dynamics, resistive force theory (RFT), astrodynamics, Hayabusa2, planetary exploration


The Hayabusa2 asteroid explorer mission focuses principally on the touchdown and samplingon near-Earth asteroid 162173 Ryugu. Hayabusa2 successfully landed on its surface andejected a projectile for sample collection on February 22, 2019. Hayabusa2 later landed neara crater formed by an impactor and executed the sampling sequence again on July 11, 2019.For a successful mission, a thorough understanding and evaluation of spacecraft dynamicsduring touchdown were crucial. The most challenging aspect of this study was the modelingof such spacecraft phenomena as the dynamics of landing on a surface with unknownproperties. In particular, a Monte Carlo analysis was used to determine the parameters ofthe operational design for the final descent and touchdown sequence. This paper discussesthe dynamical modeling of the simulation during the touchdown of Hayabusa2.


Tsinghua University Press