Sunspot drawing of 1974-4-1

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https://doi.org/10.7891/e-manuscripta-97720



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1974-04-01
10:45
Hs 1304.5:5329
https://doi.org/10.7891/e-manuscripta-97720
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
37 7 B -12.3 288.6
38 1 A -9.7 285.8
39 5 B 12.3 255.9
3 13