Sunspot drawing of 2018-7-23

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https://doi.org/10.7891/e-manuscripta-159925



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2018-07-23
08:00
Hs 1304.6:11277
https://doi.org/10.7891/e-manuscripta-159925
Observer : Marco Cagnotti
Seeing (SIDC) : 2
No group