Sunspot drawing of 2017-4-28

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https://doi.org/10.7891/e-manuscripta-159428



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2017-04-28
08:15
Hs 1304.6:10916
https://doi.org/10.7891/e-manuscripta-159428
Observer : Marco Cagnotti
Seeing (SIDC) : 1
Group Not Weighted Weighted Type Latitude Carrington Longit.
33 1 3 J 11.4 67.6
35 1 3 J -8.7 26.7
2 2 6