Sunspot drawing of 2019-2-16

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https://doi.org/10.7891/e-manuscripta-160461



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2019-02-16
09:00
Hs 1304.6:11441
https://doi.org/10.7891/e-manuscripta-160461
Observer : Marco Cagnotti
Seeing (SIDC) : 4
No group