Sunspot drawing of 2015-4-20

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https://doi.org/10.7891/e-manuscripta-158853



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2015-04-20
09:30
Hs 1304.6:10344
https://doi.org/10.7891/e-manuscripta-158853
Observer : Sergio Cortesi
Seeing (SIDC) : 2
Group Not Weighted Weighted Type Latitude Carrington Longit.
84 4 6 C 11.5 93.6
85 3 5 C 8.5 84.2
89 10 18 D 19.3 57.7
90 10 14 C 4.4 49.6
92 3 4 B 11.6 109.0
93 6 8 C -6.6 100.9
95 2 5 J -10.3 10.9
97 1 1 A -9.8 18.4
98 4 5 B 15.8 9.6
9 43 66