Sunspot drawing of 2015-8-31

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https://doi.org/10.7891/e-manuscripta-158852



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2015-08-31
08:30
Hs 1304.6:10454
https://doi.org/10.7891/e-manuscripta-158852
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
219 3 3 B 2.6 72.8
221 5 6 B 15.7 142.6
2 8 9