Sunspot drawing of 2017-6-21

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https://doi.org/10.7891/e-manuscripta-159503



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2017-06-21
07:30
Hs 1304.6:10963
https://doi.org/10.7891/e-manuscripta-159503
Observer : Marco Cagnotti
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
51 3 7 J 12.3 51.4
52 1 3 J 12.9 99.5
53 1 3 J 17.5 313.3
3 5 13