Sunspot drawing of 1971-9-11

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https://doi.org/10.7891/e-manuscripta-96828



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1971-09-11
07:30
Hs 1304.5:4568
https://doi.org/10.7891/e-manuscripta-96828
Observer : Araldo Pittini
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
260 4 B 17.2 95.8
267 3 J 13.2 318.7
2 7