Sunspot drawing of 2016-2-20

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https://doi.org/10.7891/e-manuscripta-159083



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2016-02-20
09:00
Hs 1304.6:10585
https://doi.org/10.7891/e-manuscripta-159083
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
43 4 4 J 3.5 325.6
46 12 15 D 7.1 353.4
47 4 4 C 12.4 338.2
3 20 23