Sunspot drawing of 1987-4-13

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https://doi.org/10.7891/e-manuscripta-142845



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1987-04-13
07:30
Hs 1304.6:1876
https://doi.org/10.7891/e-manuscripta-142845
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
25 7 12 C -24 178
26 28 40 D -31 130
27 4 7 C -32 138
29 10 12 C -7 125
31 9 8 B -32 119
32 2 3 J 24 73
6 60 82