Sunspot drawing of 2017-1-3

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https://doi.org/10.7891/e-manuscripta-159505



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2017-01-03
08:30
Hs 1304.6:10831
https://doi.org/10.7891/e-manuscripta-159505
Observer : Marco Cagnotti
Seeing (SIDC) : 1
No group