Sunspot drawing of 2009-4-6

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https://doi.org/10.7891/e-manuscripta-155555



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2009-04-06
08:00
Hs 1304.6:8675
https://doi.org/10.7891/e-manuscripta-155555
Observer : Sergio Cortesi
Seeing (SIDC) : 4
No group