Sunspot drawing of 2007-12-31

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https://doi.org/10.7891/e-manuscripta-154233



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2007-12-31
08:30
Hs 1304.6:8300
https://doi.org/10.7891/e-manuscripta-154233
Observer : Sergio Cortesi
Seeing (SIDC) : 2
No group