Sunspot drawing of 1977-12-20

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https://doi.org/10.7891/e-manuscripta-98771



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1977-12-20
08:50
Hs 1304.5:6475
https://doi.org/10.7891/e-manuscripta-98771
Observer : Araldo Pittini
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
179 8 C 21.5 324.5
182 2 A -26.5 355.8
2 10