Sunspot drawing of 1987-1-20

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https://doi.org/10.7891/e-manuscripta-142973



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1987-01-20
08:30
Hs 1304.6:1810
https://doi.org/10.7891/e-manuscripta-142973
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
6 1 2 A -22 85
1 1 2