Sunspot drawing of 1974-4-7

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https://doi.org/10.7891/e-manuscripta-97956



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1974-04-07
06:30
Hs 1304.5:5335
https://doi.org/10.7891/e-manuscripta-97956
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
39 19 D 11.5 259.0
40 5 B -11.4 185.2
2 24