Sunspot drawing of 2016-7-18

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https://doi.org/10.7891/e-manuscripta-159244



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2016-07-18
08:00
Hs 1304.6:10702
https://doi.org/10.7891/e-manuscripta-159244
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
136 8 12 C 3.9 174.4
138 14 20 D 4.7 165.0
141 6 9 C 15.0 125.8
3 28 41