Sunspot drawing of 1987-10-20

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https://doi.org/10.7891/e-manuscripta-142957



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1987-10-20
09:15
Hs 1304.6:2041
https://doi.org/10.7891/e-manuscripta-142957
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
110 17 26 C 21 194
111 2 6 J -31 181
113 7 12 C -25 204
115 8 13 C -33 93
116 9 12 B -41 115
117 1 1 A 17 154
6 44 70