Sunspot drawing of 2015-7-21

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https://doi.org/10.7891/e-manuscripta-158891



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2015-07-21
08:30
Hs 1304.6:10422
https://doi.org/10.7891/e-manuscripta-158891
Observer : Marco Cagnotti
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
180 2 4 C 9.7 310.4
182 13 14 C 15.8 271.2
2 15 18