Sunspot drawing of 2019-6-28

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https://doi.org/10.7891/e-manuscripta-160535



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2019-06-28
07:45
Hs 1304.6:11556
https://doi.org/10.7891/e-manuscripta-160535
Observer : Marco Cagnotti
Seeing (SIDC) : 2
No group