Sunspot drawing of 1974-12-28

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https://doi.org/10.7891/e-manuscripta-97808



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1974-12-28
08:45
Hs 1304.5:5571
https://doi.org/10.7891/e-manuscripta-97808
Observer : Sergio Cortesi
Seeing (SIDC) : 2
Group Not Weighted Weighted Type Latitude Carrington Longit.
201 2 A 4.4 35.1
210 13 C 14.6 4.6
2 15