Sunspot drawing of 1987-4-25

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https://doi.org/10.7891/e-manuscripta-142903



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1987-04-25
08:00
Hs 1304.6:1888
https://doi.org/10.7891/e-manuscripta-142903
Observer : Marco Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
38 4 12 C 27 31
39 1 3 J 3 298
2 5 15