Sunspot drawing of 1971-3-9

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https://doi.org/10.7891/e-manuscripta-96954



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1971-03-09
08:30
Hs 1304.5:4400
https://doi.org/10.7891/e-manuscripta-96954
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
69 3 J 8.3 35.0
72 1 A -11.2 339.4
79 11 D -16.3 262.7
80 5 B -8.7 295.0
4 20