Sunspot drawing of 2009-4-7

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https://doi.org/10.7891/e-manuscripta-155521



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2009-04-07
08:30
Hs 1304.6:8676
https://doi.org/10.7891/e-manuscripta-155521
Observer : Marco Cagnotti
Seeing (SIDC) : 4
No group