Sunspot drawing of 1987-4-16

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https://doi.org/10.7891/e-manuscripta-143017



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1987-04-16
07:15
Hs 1304.6:1879
https://doi.org/10.7891/e-manuscripta-143017
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
26 25 26 D -32 128
27 7 6 B -32 135
29 3 5 C -7 125
32 10 7 B 23 70
33 3 5 B -17 109
34 2 3 B -5 97
6 50 52