1. National Astronomical Observatory, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
2. SOKENDAI, The Graduate University for Advanced Studies, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
3. Changwon Science High School, 30, Pyungsanro 159th, Uichang, Changwon, 641-500, Republic of Korea
4. Korea Astronomy and Space Science Institute, 776, Daedeokdae-Ro, Youseong-Gu, Daejeon 34055, Republic of Korea
5. Korea University of Science and Technology, 217, Gajeong-ro Yuseong-gu, Daejeon 34113, Republic of Korea