Sunspot drawing of 1964-1-21

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https://doi.org/10.7891/e-manuscripta-93839



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1964-01-21
08:30
Hs 1304.5:2187
https://doi.org/10.7891/e-manuscripta-93839
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
9 7 D 8.9 74.4
1 7