Sunspot drawing of 1990-4-28

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https://doi.org/10.7891/e-manuscripta-145331



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1990-04-28
08:30
Hs 1304.6:2826
https://doi.org/10.7891/e-manuscripta-145331
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
227 12 13 B 26 245
228 7 14 D 16 267
231 3 7 J 13 215
232 4 9 G -4 214
234 13 15 D -20 262
239 5 6 B -18 248
240 1 3 J 21 163
7 45 67