Sunspot drawing of 2019-2-22

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https://doi.org/10.7891/e-manuscripta-160488



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2019-02-22
08:45
Hs 1304.6:11447
https://doi.org/10.7891/e-manuscripta-160488
Observer : Marco Cagnotti
Seeing (SIDC) : 2
No group