Sunspot drawing of 2017-9-11

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https://doi.org/10.7891/e-manuscripta-159439



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2017-09-11
08:00
Hs 1304.6:11033
https://doi.org/10.7891/e-manuscripta-159439
Observer : Marco Cagnotti
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
72 2 5 C 16.2 94.0
77 1 1 A 17.4 42.9
78 1 3 J 9.3 315.8
3 4 9