Sunspot drawing of 1974-4-4

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https://doi.org/10.7891/e-manuscripta-97690



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1974-04-04
07:30
Hs 1304.5:5332
https://doi.org/10.7891/e-manuscripta-97690
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
37 4 B -11.2 287.1
39 7 B 11.0 258.5
2 11