Sunspot drawing of 1977-12-18

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https://doi.org/10.7891/e-manuscripta-98832



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1977-12-18
08:30
Hs 1304.5:6473
https://doi.org/10.7891/e-manuscripta-98832
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
174 4 B 15.7 46.2
175 4 C -23.3 58.2
177 1 A 14.2 36.0
179 6 C 21.2 324.2
4 15