Sunspot drawing of 2015-9-18

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https://doi.org/10.7891/e-manuscripta-158862



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2015-09-18
08:00
Hs 1304.6:10463
https://doi.org/10.7891/e-manuscripta-158862
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
235 3 4 C -13.7 199.3
236 5 7 C -19.1 237.1
237 11 12 C -19.4 229.7
238 6 8 C 12.1 196.0
4 25 31