Sunspot drawing of 2017-2-22

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https://doi.org/10.7891/e-manuscripta-159586



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2017-02-22
09:00
Hs 1304.6:10864
https://doi.org/10.7891/e-manuscripta-159586
Observer : Marco Cagnotti
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
17 7 7 B 19.7 110.0
18 3 5 C 17.2 106.8
2 10 12