Sunspot drawing of 1974-9-27

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https://doi.org/10.7891/e-manuscripta-97951



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1974-09-27
07:30
Hs 1304.5:5495
https://doi.org/10.7891/e-manuscripta-97951
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
156 8 C 13.4 137.5
157 3 J 7.6 19.4
2 11