Sunspot drawing of 1981-4-6

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https://doi.org/10.7891/e-manuscripta-139175



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1981-04-06
13:15
Hs 1304.6:83
https://doi.org/10.7891/e-manuscripta-139175
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
158A 4 4 A -6 4
160 2 3 A 14 18
162 4 8 J 18 346
164 1 3 J 7 331
165 4 5 J 8 316
166 28 32 C 9 303
169 42 52 E 19 288
170 18 18 D 4 334
171 5 5 B 5 319
172 1 1 A -8 274
10 109 131