Sunspot drawing of 2018-6-21

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https://doi.org/10.7891/e-manuscripta-159864



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2018-06-21
08:45
Hs 1304.6:11245
https://doi.org/10.7891/e-manuscripta-159864
Observer : Marco Cagnotti
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
18 7 13 D 4.6 286.4
19 7 2 A 6.5 319.1
20 7 18 D 7.7 230.6
3 21 33