Sunspot drawing of 1974-12-17

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https://doi.org/10.7891/e-manuscripta-97704



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1974-12-17
08:30
Hs 1304.5:5560
https://doi.org/10.7891/e-manuscripta-97704
Observer : Araldo Pittini
Seeing (SIDC) : 2
Group Not Weighted Weighted Type Latitude Carrington Longit.
196 22 B 11.0 172.5
197 5 H 12.7 105.0
201 3 J 6.3 33.7
3 30