1. Shandong Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, School of Space Science and Physics, Institute of Space Sciences, Shandong University, Weihai, Shandong 264209, China
2. Xinjiang Astronomical Observatory, 150 Science 1-Street, Urumqi 830011, China
3. Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education, Nanjing 210093, China
4. Nanjing Amateur Astronomers Associatio, 9 Bauhinia Road, Nanjing 210012, China
5. Wenzhou Astronomical Association, Beibaixiang Town,Yueqing, Zhejiang 325603, China