*Takafumi Ootsubo¹, Hideyo Kawakita², Shinnaka Yoshiharu², Jun-ichi Watanabe³, Mitsuhiko Honda⁴ (1.Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 2.Kyoto Sangyo University, 3.National Astronomical Observatory of Japan, 4.Okayama University of Science)