Sunspot drawing of 1987-3-25

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https://doi.org/10.7891/e-manuscripta-142906



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1987-03-25
08:30
Hs 1304.6:1862
https://doi.org/10.7891/e-manuscripta-142906
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
20 9 12 C 24 78
22 1 3 J 5 294
2 10 15