Sunspot drawing of 2017-10-12

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https://doi.org/10.7891/e-manuscripta-159575



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2017-10-12
08:00
Hs 1304.6:11060
https://doi.org/10.7891/e-manuscripta-159575
Observer : Marco Cagnotti
Seeing (SIDC) : 3
No group