Sunspot drawing of 1974-5-28

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https://doi.org/10.7891/e-manuscripta-97846



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1974-05-28
13:15
Hs 1304.5:5381
https://doi.org/10.7891/e-manuscripta-97846
Observer : Sergio Cortesi
Seeing (SIDC) : 2
Group Not Weighted Weighted Type Latitude Carrington Longit.
72 17 D -15.7 342.9
75 2 A 5.2 324.4
2 19