Sunspot drawing of 2017-1-21

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https://doi.org/10.7891/e-manuscripta-159565



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2017-01-21
08:15
Hs 1304.6:10845
https://doi.org/10.7891/e-manuscripta-159565
Observer : Marco Cagnotti
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
2 3 4 A 0.4 254.0
3 3 5 C 7.5 242.9
6 18 23 B 5.8 191.4
7 9 13 C 11.1 173.0
4 33 45