Sunspot drawing of 1974-4-2

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https://doi.org/10.7891/e-manuscripta-97948



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1974-04-02
09:00
Hs 1304.5:5330
https://doi.org/10.7891/e-manuscripta-97948
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
37 3 B -11.4 285.4
39 5 B 11.8 256.8
2 8