Sunspot drawing of 2018-12-4

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https://doi.org/10.7891/e-manuscripta-159983



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2018-12-04
08:30
Hs 1304.6:11379
https://doi.org/10.7891/e-manuscripta-159983
Observer : Marco Cagnotti
Seeing (SIDC) : 1
No group