Sunspot drawing of 2016-9-30

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https://doi.org/10.7891/e-manuscripta-159174



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2016-09-30
09:45
Hs 1304.6:10768
https://doi.org/10.7891/e-manuscripta-159174
Observer : Sergio Cortesi
Seeing (SIDC) : 4
No group