Sunspot drawing of 1987-6-12

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https://doi.org/10.7891/e-manuscripta-142842



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1987-06-12
08:00
Hs 1304.6:1927
https://doi.org/10.7891/e-manuscripta-142842
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
53 3 3 B -19 83
54 1 4 A -11 65
55 1 1 A 28 335
3 5 8