Sunspot drawing of 2018-4-23

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https://doi.org/10.7891/e-manuscripta-160013



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2018-04-23
07:30
Hs 1304.6:11197
https://doi.org/10.7891/e-manuscripta-160013
Observer : Marco Cagnotti
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
9 18 20 C 2.7 281.1
1 18 20