Sunspot drawing of 1981-4-13

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https://doi.org/10.7891/e-manuscripta-139042



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1981-04-13
07:15
Hs 1304.6:90
https://doi.org/10.7891/e-manuscripta-139042
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
165 2 4 C 10 319
166 6 11 D 8 309
169 20 24 D 18 290
172 1 1 A -9 275
175 4 4 B 18 281
176 2 3 B 21 246
178 7 9 C 8 300
179 45 47 E 13 233
182 28 24 C 9 220
183 5 10 C -5 219
186 2 3 B 16 307
187 3 2 A -9 254
188 14 16 C -8 192
189 4 5 A -4 234
190 5 11 C 23 175
191 1 1 A 17 177
16 149 175