Sunspot drawing of 2017-4-19

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https://doi.org/10.7891/e-manuscripta-159458



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2017-04-19
08:30
Hs 1304.6:10911
https://doi.org/10.7891/e-manuscripta-159458
Observer : Marco Cagnotti
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
33 3 9 D 12.2 69.7
1 3 9