Sunspot drawing of 2018-6-20

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https://doi.org/10.7891/e-manuscripta-159994



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2018-06-20
07:00
Hs 1304.6:11244
https://doi.org/10.7891/e-manuscripta-159994
Observer : Marco Cagnotti
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
18 11 15 C 4.6 286.4
19 11 9 D 7.7 315.1
20 11 19 D 7.6 232.0
3 33 43