Author Affiliations +
Kenji Mitsui,1 Norio Okada,1 Mitsuhiro Fukushima,1 Tetsuo Nishino,1 Yoshiko Kataza Okamoto,2 Hirokazu Kataza,3 Takashi Onaka4
1National Astronomical Observatory of Japan (Japan)
2Ibaraki Univ. (Japan)
3Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
4The Univ. of Tokyo (Japan)