천문학논총 (Publications of The Korean Astronomical Society)
- 제11권1호
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- Pages.251-261
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- 1996
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- 1225-1534(pISSN)
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- 2287-6936(eISSN)
1995년 흑점 상대수
THE RELATIVE SUNSPOT NUMBERS IN 1995
초록
We analyze 280 data of the daily sunspot observations during the period of January 1 to December 31 in 1995 and present the daily relative sunspot numbers. During the 1995, the preliminary annual average of the relative sunspot numbers is found to be 20.1 based on 7.9 distinct spots in a single group for 1.3 spot groups. According to the appearance of 366 spot groups, our analysis shows that the mean life time of spot group is about 5 day and 10.1 hours.
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