Sunspot drawing of 2017-3-7

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https://doi.org/10.7891/e-manuscripta-159551



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2017-03-07
09:15
Hs 1304.6:10873
https://doi.org/10.7891/e-manuscripta-159551
Observer : Marco Cagnotti
Seeing (SIDC) : 3
No group