Sunspot drawing of 1977-2-4

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https://doi.org/10.7891/e-manuscripta-98710
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1977-02-04
08:00
Hs 1304.5:6210
https://doi.org/10.7891/e-manuscripta-98710
Observer : Araldo Pittini
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
13 20 B 24.8 257.5
1 20