*Sunao HASEGAWA¹, Seidai MIYASAKA², Hiroyuki MITO³, Yuki SARUGAKU¹, Tomohiko OZAWA⁴, Daisuke KURODA⁵, Michitoshi YOSHIDA⁶, Kenshi YANAGISAWA⁵, Yasuhiro SHIMIZU⁵, Shogo NAGAYAMA⁵, Hiroyuki TODA⁵, Kouji OKITA⁵, Nobuyuki KAWAI⁷, Tomohiko SEKIGUCHI⁸, Masateru ISHIGURO⁹, Masanao ABE¹ (1.Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 2.Tokyo Metropolitan Government, 3.Kiso Observatory, Institute of Astronomy, The University of Tokyo, 4.Misato Observatory, 5.Okayama Astrophysical Observatory, National Astronomical Observatory, 6.Hiroshima Astrophysical Science Center, Hiroshima University, 7.Graduate School of engineering, , Tokyo Institute of Technology, 8.Asahikawa Campus, Hokkaido University of Education, 9.Department of Physical and Astronomy, Seoul National University)

*Masateru ISHIGURO¹, Daisuke KURODA², Sunao HASEGAWA³, HAYABUSA 2, Observation sub-group ⁴ (1.Department of Physical and Astronomy, Seoul National University, 2.Okayama Astrophysical Observatory, National Astronomical Observatory of Japan, 3.Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 4.Japan Aerospace Exploration Agency)

*Daisuke KURODA¹, Masateru ISHIGURO², Naruhisa TAKATO³, Sunao HASEGAWA⁴, Masanao ABE⁴, Yuichi TSUDA⁴, Seiji SUGITA⁵, Fumihiko USUI⁶, Takashi HATTORI³, Ikuru IWATA³, Masatoshi IMANISHI³, Hiroshi TERADA³, Young-jun CHOI⁷, Sei-ichiro WATANABE⁸, Makoto YOSHIKAWA⁴ (1.Okayama Astrophysical Observatory, National Astronomical Observatory of Japan, 2.Department of Physics and Astronomy, Seoul National University, 3.Subaru Telescope, National Astronomical Observatory of Japan, 4.Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 5.Graduate School of Frontier Science, The University of Tokyo, 6.Graduate School of Science, The University of Tokyo, 7.Korea Astronomy and Space Science Institute, 8.Graduate School of Science, Nagoya University)