Sunspot drawing of 2017-1-31

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https://doi.org/10.7891/e-manuscripta-159418



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2017-01-31
09:45
Hs 1304.6:10854
https://doi.org/10.7891/e-manuscripta-159418
Observer : Marco Cagnotti
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
9 1 3 J 15.2 112.3
12 5 6 B -4.8 112.5
2 6 9