Sunspot drawing of 1991-4-20

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https://doi.org/10.7891/e-manuscripta-145852



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1991-04-20
09:00
Hs 1304.6:3132
https://doi.org/10.7891/e-manuscripta-145852
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
171 1 3 J -25 263
180 30 39 D 8 244
188 14 11 D 13 214
191 4 5 B -19 241
192 13 15 D -10 191
194 6 7 C -24 174
195 1 2 A -7 186
197 4 7 C 16 224
198 4 5 B -26 219
201 4 4 B -17 181
202 1 1 A 6 130
203 3 3 A -12 220
204 3 2 B -13 201
205 1 1 A -26 182
14 89 105