Sunspot drawing of 1973-5-20

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https://doi.org/10.7891/e-manuscripta-97462



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1973-05-20
08:15
Hs 1304.5:5069
https://doi.org/10.7891/e-manuscripta-97462
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
116 2 A -9.0 197.5
117/118 28 D 10.3 151.9
2 30