Sunspot drawing of 2017-12-19

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https://doi.org/10.7891/e-manuscripta-159545



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2017-12-19
09:15
Hs 1304.6:11115
https://doi.org/10.7891/e-manuscripta-159545
Observer : Marco Cagnotti
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
93 1 1 A 18.4 89.2
1 1 1