Sunspot drawing of 2016-2-21

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https://doi.org/10.7891/e-manuscripta-159182



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2016-02-21
10:15
Hs 1304.6:10586
https://doi.org/10.7891/e-manuscripta-159182
Observer : Andrea Manna
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
43 3 5 J 3.5 325.8
46 15 20 D 7.3 353.2
47 2 3 B 12.0 338.4
3 20 28