Hayabusa2 Landing Site Selection: Surface Topography of Ryugu and Touchdown Safety
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Hayabusa2 Landing Site Selection: Surface Topography of Ryugu and Touchdown Safety Shota Kikuchi1 · Sei-ichiro Watanabe2,1 · Takanao Saiki1 · Hikaru Yabuta3 · Seiji Sugita4,5,6 · Tomokatsu Morota4,2 · Naru Hirata7 · Naoyuki Hirata8 · Tatsuhiro Michikami9 · Chikatoshi Honda7 · Yashuhiro Yokota1 · Rie Honda10 · Naoya Sakatani1,11 · Tatsuaki Okada1 · Yuri Shimaki1 · Koji Matsumoto12 · Rina Noguchi1 · Yuto Takei1 · Fuyuto Terui1 · Naoko Ogawa1 · Kent Yoshikawa13 · Go Ono13 · Yuya Mimasu1 · Hirotaka Sawada1 · Hitoshi Ikeda13 · Chikako Hirose13 · Tadateru Takahashi1,14 · Atsushi Fujii1 · Tomohiro Yamaguchi1,15 · Yoshiaki Ishihara16,17 · Tomoki Nakamura18 · Kohei Kitazato7 · Koji Wada6 · Shogo Tachibana4,1 · Eri Tatsumi19,4 · Moe Matsuoka1 · Hiroki Senshu6 · Shingo Kameda20 · Toru Kouyama21 · Manabu Yamada6 · Kei Shirai1,22 · Yuichiro Cho4 · Kazunori Ogawa23,8 · Yukio Yamamoto1 · Akira Miura1 · Takahiro Iwata1 · Noriyuki Namiki12 · Masahiko Hayakawa1 · Masanao Abe1 · Satoshi Tanaka1 · Makoto Yoshikawa1 · Satoru Nakazawa1 · Yuichi Tsuda1 Received: 15 January 2020 / Accepted: 25 September 2020 / Published online: 15 October 2020 © Springer Nature B.V. 2020
Abstract One of the primary goals of Hayabusa2 is to land on the asteroid Ryugu to collect its surface materials. The key for a successful touchdown is to find a promising landing Note by the Editor: This is a Special Communication, linked to the Topical Volume on the Hayabusa2 mission published in Space Science Reviews (https://link.springer.com/journal/11214/208/1).
B S. Kikuchi
[email protected]
1
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
2
Department of Earth and Planetary Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8601, Japan
3
Department of Earth and Planetary Systems Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
4
Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
5
Research Center for Early Universe, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
6
Planetary Exploration Research Center, Chiba Institute of Technology, 2-17-1 Tsudanuma, Narashino, Chiba 275-0016, Japan
7
The University of Aizu, 90 Kami-iawase, Tsuruga, Ikki-machi, Aizu-Wakamatsu, Fukushima 965-8580, Japan
8
Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo 657-8501, Japan
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site that meets both scientific and engineering requirements. Due to the limited availability of pre-arrival information about Ryugu, the landing site selection (LSS) must be conducted based on proximity observations over a limited length of time. In addition, Ryugu was discovered to possess an unexpectedly high abundance of boulders with an absence of wide and flat areas, further complicating the LSS. To resolve these problems, we dev
