Sunspot drawing of 1973-9-19

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https://doi.org/10.7891/e-manuscripta-97623
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1973-09-19
08:00
Hs 1304.5:5181
https://doi.org/10.7891/e-manuscripta-97623
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
186 4 C 13.0 327.4
1 4