Sunspot drawing of 2015-8-21

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https://doi.org/10.7891/e-manuscripta-158843



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2015-08-21
07:30
Hs 1304.6:10447
https://doi.org/10.7891/e-manuscripta-158843
Observer : Marco Cagnotti
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
209 2 2 A -10.4 271.6
211 35 53 D -15.0 191.4
212 2 2 A 13.7 202.7
213 1 1 A 18.4 272.1
4 40 58