Sunspot drawing of 2018-12-12

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https://doi.org/10.7891/e-manuscripta-160011



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2018-12-12
08:30
Hs 1304.6:11386
https://doi.org/10.7891/e-manuscripta-160011
Observer : Marco Cagnotti
Seeing (SIDC) : 3
No group