Sunspot drawing of 2015-12-17

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https://doi.org/10.7891/e-manuscripta-158722



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2015-12-17
09:15
Hs 1304.6:10538
https://doi.org/10.7891/e-manuscripta-158722
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
320 5 5 C -16.7 124.0
321 2 3 J 18.5 99.6
322 13 17 E 12.8 82.0
326 1 1 A -16.1 40.2
4 21 26