Sunspot drawing of 2018-3-23

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https://doi.org/10.7891/e-manuscripta-160040



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2018-03-23
10:00
Hs 1304.6:11175
https://doi.org/10.7891/e-manuscripta-160040
Observer : Marco Cagnotti
Seeing (SIDC) : 2
No group