Sunspot drawing of 1987-4-22

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https://doi.org/10.7891/e-manuscripta-142766



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1987-04-22
07:30
Hs 1304.6:1885
https://doi.org/10.7891/e-manuscripta-142766
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
37 4 3 A -26 2
38 2 3 B 26 31
39 2 4 J 4 297
3 8 10