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Astrodynamics 2020, 4(2): 119-135 https://doi.org/10.1007/s42064-020-0073-x
Research Article | Issue | Published: 16 June 2020

Modeling and analysis of Hayabusa2 touchdown

Show Author's Information Kent Yoshikawa1( ),  Hirotaka Sawada1,  Shota Kikuchi1,  Naoko Ogawa1,  Yuya Mimasu1,  Go Ono1,  Yuto Takei1,  Fuyuto Terui1,  Takanao Saiki1,  Seiji Yasuda2,  Kota Matsushima2,  Tetsuya Masuda2,  Yuichi Tsuda1
Japan Aerospace Exploration Agency, Sagamihara 252-5210, Japan
NEC Corporation, Fuchu 183-8501, Japan
Keywords:
astrodynamics, Hayabusa2, contact dynamics, resistive force theory (RFT), planetary exploration
Cite this article:
Yoshikawa K, Sawada H, Kikuchi S, et al. Modeling and analysis of Hayabusa2 touchdown. Astrodynamics, 2020, 4(2): 119-135. https://doi.org/10.1007/s42064-020-0073-x
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Abstract Full text About this article

The Hayabusa2 asteroid explorer mission focuses principally on the touchdown and sampling on near-Earth asteroid 162173 Ryugu. Hayabusa2 successfully landed on its surface and ejected a projectile for sample collection on February 22, 2019. Hayabusa2 later landed near a 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 dynamics during touchdown were crucial. The most challenging aspect of this study was the modeling of such spacecraft phenomena as the dynamics of landing on a surface with unknown properties. In particular, a Monte Carlo analysis was used to determine the parameters of the operational design for the final descent and touchdown sequence. This paper discusses the dynamical modeling of the simulation during the touchdown of Hayabusa2.


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About this article

Modeling and analysis of Hayabusa2 touchdown

Show Author's information Kent Yoshikawa1( ), Hirotaka Sawada1, Shota Kikuchi1, Naoko Ogawa1, Yuya Mimasu1, Go Ono1, Yuto Takei1, Fuyuto Terui1, Takanao Saiki1, Seiji Yasuda2, Kota Matsushima2, Tetsuya Masuda2, Yuichi Tsuda1
Japan Aerospace Exploration Agency, Sagamihara 252-5210, Japan
NEC Corporation, Fuchu 183-8501, Japan

Abstract

The Hayabusa2 asteroid explorer mission focuses principally on the touchdown and sampling on near-Earth asteroid 162173 Ryugu. Hayabusa2 successfully landed on its surface and ejected a projectile for sample collection on February 22, 2019. Hayabusa2 later landed near a 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 dynamics during touchdown were crucial. The most challenging aspect of this study was the modeling of such spacecraft phenomena as the dynamics of landing on a surface with unknown properties. In particular, a Monte Carlo analysis was used to determine the parameters of the operational design for the final descent and touchdown sequence. This paper discusses the dynamical modeling of the simulation during the touchdown of Hayabusa2.

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

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Publication history
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Publication history

Received: 28 January 2020
Accepted: 23 March 2020
Published: 16 June 2020
Issue date: June 2020

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