Sunspot drawing of 1973-12-28

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https://doi.org/10.7891/e-manuscripta-97381



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1973-12-28
09:00
Hs 1304.5:5265
https://doi.org/10.7891/e-manuscripta-97381
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
234 4 H -18.0 194.9
1 4