Sunspot drawing of 2018-4-30

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https://doi.org/10.7891/e-manuscripta-159932



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2018-04-30
07:45
Hs 1304.6:11202
https://doi.org/10.7891/e-manuscripta-159932
Observer : Marco Cagnotti
Seeing (SIDC) : 3
No group