Sunspot drawing of 1987-4-27

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https://doi.org/10.7891/e-manuscripta-142918



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1987-04-27
07:45
Hs 1304.6:1890
https://doi.org/10.7891/e-manuscripta-142918
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
39 2 4 J 3 298
1 2 4