Sunspot drawing of 2015-7-20

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https://doi.org/10.7891/e-manuscripta-158804



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2015-07-20
08:00
Hs 1304.6:10421
https://doi.org/10.7891/e-manuscripta-158804
Observer : Marco Cagnotti
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
180 1 3 J 10.2 311.2
182 12 17 D 15.7 271.6
2 13 20