Sunspot drawing of 2019-2-11

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https://doi.org/10.7891/e-manuscripta-160653



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2019-02-11
08:30
Hs 1304.6:11437
https://doi.org/10.7891/e-manuscripta-160653
Observer : Marco Cagnotti
Seeing (SIDC) : 2
No group