Sunspot drawing of 1973-4-13

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https://doi.org/10.7891/e-manuscripta-97326



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1973-04-13
07:30
Hs 1304.5:5038
https://doi.org/10.7891/e-manuscripta-97326
Observer : Sergio Cortesi
Seeing (SIDC) : 2
Group Not Weighted Weighted Type Latitude Carrington Longit.
86 1 A -10.2 355.6
88 40 D -8.3 324.3
2 41