Sunspot drawing of 2009-3-31

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https://doi.org/10.7891/e-manuscripta-155709



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2009-03-31
07:00
Hs 1304.6:8669
https://doi.org/10.7891/e-manuscripta-155709
Observer : Marco Cagnotti
Seeing (SIDC) : 3
No group