[P-PS03] Small Bodies in the Solar System: Current Understanding and Future Prospects

[PPS03-P16] Spectroscopic, spectrophotometric, and periodic observations for low delta-v near-Earth asteroids

*Sunao Hasegawa¹, Daisuke Kuroda², Kohei Kitazato³, Toshinori Kasuga⁴, Naruhisa Takato², Kentaro Aoki², Akira Arai⁵, Tetsuharu Fuse⁶, Takashi Hattori², Hidekazu Hanayama², Yang Hongu⁷, Nobunari Kashikawa², Kyoko Kawakami⁸, Daisuke Kinoshita⁹, Shogo Nagayama², Setsuko Nishihara⁸, Yohei Ohba⁸, Yoichi Oyama¹⁰, Yuki Sarugaku⁵, Tomohiko Sekiguchi¹¹, Yasuhiro Shimizu², Yuhei Takagi², Jun Takahashi¹², Hiroyuki Toda², Fumihiko Usui¹³, Makoto Watanabe¹⁴, Kenshi Yanagisawa², Michitoshi Yoshida², Masanao Abe², Masateru Ishiguro⁷ (1.Japan Aerospace Exploration Agency, 2.National Astronomical Observatory of Japan, 3.University of Aizu, 4.Kyoto University, 5.Kyoto Sangyo University, 6.National Institute of Information and Communications Technology, 7.Seoul National University, 8.University of Tokyo, 9.National Central University, 10.Academia Sinica Institute of Astronomy and Astrophysics, 11.Hokkaido University of Education, 12.University of Hyogo, 13.Kobe University, 14.Okayama University of Science)

Keywords:asteroids, observations

Hayabusa (MUSES-C) conducted sample return mission from the near-Earth asteroid 25143 Itokawa (1998 SF₃₆), and Hayabusa2 is under exploration to the near-Earth asteroid 162173 Ryugu (1999 JU₃).
It is indispensable to select candidate small bodies that will be the exploration and to know their physical characteristics in advance.
Before Hayabusa launched, we have done physical observation of candidate prospecting for asteroid exploration mission (Abe+2000, Ishibashi+2000a, +2000b, Ishiguro+2003, Kaasalainen+2003, Ohba+2003, Sekiguchi+2003, Cellino+2005, Lederer+2005, Nishihara+in-press, Müller+2005, Müller+2007, Hasegwa+2008, Müller+2011, Urakawa+2011, Kim+2013, Kuroda+2014, Ishiguro+2014, Müller+2014, Müller+2017, Perna+2017).
Currently, Hayabusa2 has already been launched, and the asteroid to be explored are determined to be the C-complex asteroid 162173 Ryugu.
For this reason, the observation for searching for a candidate for exploration candidate is now finished.
Therefore, we report on the physical properties of observed asteroids (5 Spectroscopic, 26 spectrophotometric, and 32 periodic observations) for the information of future exploration.