Sunspot drawing of 1987-2-25

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https://doi.org/10.7891/e-manuscripta-143053



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1987-02-25
10:00
Hs 1304.6:1834
https://doi.org/10.7891/e-manuscripta-143053
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
12 1 3 J 37 315
1 1 3