Sunspot drawing of 2011-5-20

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https://doi.org/10.7891/e-manuscripta-156901



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2011-05-20
08:15
Hs 1304.6:9309
https://doi.org/10.7891/e-manuscripta-156901
Observer : Marco Cagnotti
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
97 1 3 J -24.4 278.6
99 1 3 J -15.6 194.4
100 1 2 A -16.4 166.9
3 3 8