Sunspot drawing of 2017-1-9

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https://doi.org/10.7891/e-manuscripta-159470



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2017-01-09
09:00
Hs 1304.6:10836
https://doi.org/10.7891/e-manuscripta-159470
Observer : Sergio Cortesi
Seeing (SIDC) : 2
No group