Sunspot drawing of 2017-9-1

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https://doi.org/10.7891/e-manuscripta-159509



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2017-09-01
08:30
Hs 1304.6:11026
https://doi.org/10.7891/e-manuscripta-159509
Observer : Marco Cagnotti
Seeing (SIDC) : 2
Group Not Weighted Weighted Type Latitude Carrington Longit.
67 1 6 J 8.5 224.4
69 1 3 J -8.5 119.5
72 12 20 E 12.9 103.7
73 4 7 C -7.1 177.7
4 18 36