Sunspot drawing of 2018-4-10

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https://doi.org/10.7891/e-manuscripta-159948



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2018-04-10
09:30
Hs 1304.6:11187
https://doi.org/10.7891/e-manuscripta-159948
Observer : Marco Cagnotti
Seeing (SIDC) : 1
No group