Sunspot drawing of 2017-12-31

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https://doi.org/10.7891/e-manuscripta-159472



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2017-12-31
11:15
Hs 1304.6:11124
https://doi.org/10.7891/e-manuscripta-159472
Observer : Andrea Manna
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
95 4 4 B 5.0 344.3
1 4 4