Sunspot drawing of 1987-4-12

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https://doi.org/10.7891/e-manuscripta-142894



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1987-04-12
07:30
Hs 1304.6:1875
https://doi.org/10.7891/e-manuscripta-142894
Observer : Marco Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
25 7 13 C -23 178
26 17 35 D -30 131
27 5 8 D -32 138
29 10 16 C -6 125
31 3 4 A -31 119
32 1 3 J 25 72
6 43 79