Sunspot drawing of 2011-3-20

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https://doi.org/10.7891/e-manuscripta-156969



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2011-03-20
08:45
Hs 1304.6:9250
https://doi.org/10.7891/e-manuscripta-156969
Observer : Andrea Manna
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
34 11 12 C 11.3 331.7
35 1 2 A 19.4 11.7
2 12 14