Sunspot drawing of 2017-6-18

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https://doi.org/10.7891/e-manuscripta-159415



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2017-06-18
10:15
Hs 1304.6:10960
https://doi.org/10.7891/e-manuscripta-159415
Observer : Andrea Manna
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
51 1 3 J 12.3 51.8
52 8 12 D 13.0 95.7
2 9 15