Sunspot drawing of 1974-12-31

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https://doi.org/10.7891/e-manuscripta-97893



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1974-12-31
09:30
Hs 1304.5:5574
https://doi.org/10.7891/e-manuscripta-97893
Observer : Sergio Cortesi
Seeing (SIDC) : 1
Group Not Weighted Weighted Type Latitude Carrington Longit.
211 8 D -9.0 242.0
1 8