Sunspot drawing of 1974-4-3

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https://doi.org/10.7891/e-manuscripta-97924



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1974-04-03
09:15
Hs 1304.5:5331
https://doi.org/10.7891/e-manuscripta-97924
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
37 3 A -12.2 290.0
39 5 B 11.2 257.9
2 8