Sunspot drawing of 2019-2-23

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https://doi.org/10.7891/e-manuscripta-160413



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2019-02-23
08:45
Hs 1304.6:11448
https://doi.org/10.7891/e-manuscripta-160413
Observer : Marco Cagnotti
Seeing (SIDC) : 3
No group