Sunspot drawing of 1981-4-2

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https://doi.org/10.7891/e-manuscripta-139213



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1981-04-02
07:45
Hs 1304.6:80
https://doi.org/10.7891/e-manuscripta-139213
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
144 13 28 D -43 98
147 1 3 J 22 98
148 3 5 C -12 67
152 11 12 B 17 41
155 1 2 A 9 95
156 15 17 C 25 24
157 2 3 A 3 20
158 1 3 J -4 13
159 5 5 B -11 30
160 22 18 C 12 21
161 2 3 A 10 14
162 7 10 J 17 347
163 11 9 B -16 335
164 2 6 J 6 329
165 1 3 J 9 313
15 97 127