Sunspot drawing of 1974-9-21

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https://doi.org/10.7891/e-manuscripta-97665



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1974-09-21
08:00
Hs 1304.5:5489
https://doi.org/10.7891/e-manuscripta-97665
Observer : Araldo Pittini
Seeing (SIDC) : 2
Group Not Weighted Weighted Type Latitude Carrington Longit.
149 12 D 9.1 267.2
1 12