Sunspot drawing of 1973-12-13

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https://doi.org/10.7891/e-manuscripta-97600



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1973-12-13
09:15
Hs 1304.5:5256
https://doi.org/10.7891/e-manuscripta-97600
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
232 3 J 1.9 305.1
1 3