Sunspot drawing of 1973-4-20

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https://doi.org/10.7891/e-manuscripta-97347



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1973-04-20
07:30
Hs 1304.5:5045
https://doi.org/10.7891/e-manuscripta-97347
Observer : Araldo Pittini
Seeing (SIDC) : 2
Group Not Weighted Weighted Type Latitude Carrington Longit.
95 18 D 11.0 151.0
96 4 J 9.4 147.4
97 18 C -15.8 182.6
3 40