Motion reconstruction of the small carry-on impactor aboard Hayabusa2

作     者：Takanao Saiki Yuya Mimasu Yuto Takei Manabu Yamada Hirotaka Sawada K azunori Ogawa Naoko Ogawa Hiroshi Takeuchi Akira Miura Yuri Shimaki Koji Wada Rie Honda Yasuhiro Yokota Kei Shirai Naruhisa Sano Hirohito Ohtsuka Go Ono Kent Yoshikawa Shota Kikuchi Chikako Hirose Yukio Yamamoto Takahiro Iwata Masahiko Arakawa Seiji Sugita Satoshi Tanaka Fuyuto Terui Makoto Yoshikawa Satoru Nakazawa Sei-ichiro Watanabe Yuichi Tsuda 

作者机构：Japan Aerospace Exploration AgencySagamihara 252-5210Japan Chiba Institute of TechnologyNarashino 275-0016Japan Kobe UniversityK obe 657-8501Japan The Graduate University for Aduanced StudiesSagamihara 252-5210Japan Kochi UniversityKochi 780-8520Japan IHI Aerospace Co.LtdTomioka 370-2398Japan The University of TokyoTokyo 113-0033Japan Nagoya UniversityNagoya 464-8601Japan 

出 版 物：《Astrodynamics》 (航天动力学（英文）)

年 卷 期：2020年第4卷第4期

页      面：289-308页

核心收录：

学科分类：0709[理学-地质学] 07[理学] 0708[理学-地球物理学] 070401[理学-天体物理] 0802[工学-机械工程] 0825[工学-航空宇航科学与技术] 0704[理学-天文学] 

基　　金：Japan Society for the Promotion of Science  JSPS  (18K11610) 

主　　题：small body exploration Hayabusa2 kinetic impact artificial crater motion reconstruction 

摘      要：Subsurface exploration is one of the most ambitious scientific objectives of the Hayabusa2 mission.A small device called small carry-on impactor(SCI)was developed to create an artificial crater on the surface of asteroid *** enables us to sample subsurface materials,which will provide a window to the *** physical properties of the resulting crater are also useful for understanding the internal structure of *** understanding of the crater and ejecta properties,including the depth of excavation of subsurface materials,requires accurate information on impact *** particular,the impact angle is a critical factor because it greatly influences the size and shape of the *** April 5,2019,the Hayabusa2 spacecraft deployed the SCI at 500 m of altitude above the asteroid *** SCI gradually reduced its altitude,and it shot a 2 kg copper projectile into the asteroid 40 min after *** the position of the released SCI is essential for determining the impact *** study describes the motion reconstruction of the SCI based on the actual operation *** results indicate that the SCI was released with high accuracy.