Sunspot drawing of 2019-1-31

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https://doi.org/10.7891/e-manuscripta-160526



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2019-01-31
08:15
Hs 1304.6:11429
https://doi.org/10.7891/e-manuscripta-160526
Observer : Marco Cagnotti
Seeing (SIDC) : 3
No group