Sunspot drawing of 2017-9-6

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https://doi.org/10.7891/e-manuscripta-159603



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2017-09-06
08:30
Hs 1304.6:11030
https://doi.org/10.7891/e-manuscripta-159603
Observer : Marco Cagnotti
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
69 21 38 D -9.4 118.8
72 20 38 F 13.5 103.6
75 10 7 A 17.8 50.0
76 1 2 C 10.7 43.8
4 52 85