Sunspot drawing of 2011-6-20

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https://doi.org/10.7891/e-manuscripta-156967



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2011-06-20
07:30
Hs 1304.6:9333
https://doi.org/10.7891/e-manuscripta-156967
Observer : Marco Cagnotti
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
121 16 17 D 16.8 167.1
123 2 1 A 16.1 146.8
2 18 18