Sunspot drawing of 2019-10-4

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https://doi.org/10.7891/e-manuscripta-160557



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2019-10-04
07:00
Hs 1304.6:11646
https://doi.org/10.7891/e-manuscripta-160557
Observer : Marco Cagnotti
Seeing (SIDC) : 2
No group