Sunspot drawing of 1987-4-11

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https://doi.org/10.7891/e-manuscripta-142977



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1987-04-11
07:30
Hs 1304.6:1874
https://doi.org/10.7891/e-manuscripta-142977
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
25 11 17 C -23 179
26 31 42 D -30 132
27 4 6 C -33 139
29 21 24 C -6 124
30 4 2 A -9 112
31 4 5 B -30 121
32 1 3 J 26 72
7 76 99