Sunspot drawing of 2017-4-18

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https://doi.org/10.7891/e-manuscripta-159618



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2017-04-18
08:00
Hs 1304.6:10910
https://doi.org/10.7891/e-manuscripta-159618
Observer : Marco Cagnotti
Seeing (SIDC) : 2
Group Not Weighted Weighted Type Latitude Carrington Longit.
32 2 2 B 11.8 166.8
33 2 6 D 11.6 69.6
2 4 8