Sunspot drawing of 2017-1-4

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https://doi.org/10.7891/e-manuscripta-159507



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2017-01-04
08:30
Hs 1304.6:10832
https://doi.org/10.7891/e-manuscripta-159507
Observer : Marco Cagnotti
Seeing (SIDC) : 1
No group