Sunspot drawing of 2017-12-14

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https://doi.org/10.7891/e-manuscripta-159530



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2017-12-14
09:00
Hs 1304.6:11111
https://doi.org/10.7891/e-manuscripta-159530
Observer : Sergio Cortesi
Seeing (SIDC) : 2
No group