摘要
1 INTRODUCTION The sunspot group 5395 was appeared in the east of the solar disc on 6 March anddisappeared in the west of the solar disc on 20 March in 1989. Its heliographiccoordinates were N34, L257. It has been the largest group according to its area since
出处
《天文研究与技术》
CSCD
1990年第4期25-27,319,共4页
Astronomical Research & Technology