Sunspot drawing of 2019-9-19

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https://doi.org/10.7891/e-manuscripta-160602



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2019-09-19
08:30
Hs 1304.6:11632
https://doi.org/10.7891/e-manuscripta-160602
Observer : Sergio Cortesi
Seeing (SIDC) : 3
No group