Sunspot drawing of 2011-2-22

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https://doi.org/10.7891/e-manuscripta-156878



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2011-02-22
10:30
Hs 1304.6:9232
https://doi.org/10.7891/e-manuscripta-156878
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
17 9 15 D 11.6 334.0
18 4 7 D 18.1 337.8
2 13 22