Sunspot drawing of 2011-7-21

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https://doi.org/10.7891/e-manuscripta-156863



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2011-07-21
06:30
Hs 1304.6:9359
https://doi.org/10.7891/e-manuscripta-156863
Observer : Marco Cagnotti
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
137 1 3 J 16.2 169.3
139 12 21 D -22.9 136.2
144 14 17 D 24.9 78.3
3 27 41