Sunspot drawing of 2016-12-18

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https://doi.org/10.7891/e-manuscripta-159101



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2016-12-18
10:30
Hs 1304.6:10817
https://doi.org/10.7891/e-manuscripta-159101
Observer : Andrea Manna
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
214 2 3 B 10.0 311.2
215 6 10 D 3.2 279.6
216 3 4 B 14.2 273.2
3 11 17