천문학논총 (Publications of The Korean Astronomical Society)
- 제10권1호
- /
- Pages.57-66
- /
- 1995
- /
- 1225-1534(pISSN)
- /
- 2287-6936(eISSN)
1994년 흑점 상대수
THE RELATIVE SUNSPOT NUMBERS IN 1994
초록
We analyze 271 data of the daily sunspot observations during the period of January 1 to December 31 in 1994 and present the daily relative sunspot numbers. During the 1994, the preliminary annual average of the relative sunspot numbers is found to be 32.9 based on 12.4 distinct spots in a single group for 2.2 spot groups. According to the appearance of 146 spot groups, our analysis shows that the mean life time of spot group is about 4 day and 19.2 hours.
키워드