Sunspot drawing of 2017-12-23

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https://doi.org/10.7891/e-manuscripta-159397



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2017-12-23
10:00
Hs 1304.6:11118
https://doi.org/10.7891/e-manuscripta-159397
Observer : Marco Cagnotti
Seeing (SIDC) : 2
Group Not Weighted Weighted Type Latitude Carrington Longit.
93 10 21 D 17.3 86.7
1 10 21