Sunspot drawing of 2017-2-23

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https://doi.org/10.7891/e-manuscripta-159665



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2017-02-23
07:45
Hs 1304.6:10865
https://doi.org/10.7891/e-manuscripta-159665
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
17 5 5 B 20.8 111.8
18 2 4 J 17.0 107.7
2 7 9