Sunspot drawing of 2017-9-7

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https://doi.org/10.7891/e-manuscripta-159651



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2017-09-07
08:00
Hs 1304.6:11031
https://doi.org/10.7891/e-manuscripta-159651
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
69 25 39 D -9.7 119.1
72 25 36 F 12.6 102.9
75 4 4 A 17.0 50.4
76 4 6 C 11.0 43.3
4 58 85