Sunspot drawing of 2010-4-19

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https://doi.org/10.7891/e-manuscripta-156475



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2010-04-19
08:00
Hs 1304.6:8993
https://doi.org/10.7891/e-manuscripta-156475
Observer : Sergio Cortesi
Seeing (SIDC) : 3
No group