Sunspot drawing of 2017-5-21

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https://doi.org/10.7891/e-manuscripta-159529



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2017-05-21
10:30
Hs 1304.6:10934
https://doi.org/10.7891/e-manuscripta-159529
Observer : Andrea Manna
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
41 1 3 J 10.7 65.6
42 2 4 J -6.6 70.3
43 6 6 B 13.5 38.5
3 9 13