Sunspot drawing of 1974-10-20

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https://doi.org/10.7891/e-manuscripta-97864



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1974-10-20
09:30
Hs 1304.5:5513
https://doi.org/10.7891/e-manuscripta-97864
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
169 14 B 7.3 214.9
1 14