Sunspot drawing of 2016-4-12

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https://doi.org/10.7891/e-manuscripta-159197



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2016-04-12
09:00
Hs 1304.6:10623
https://doi.org/10.7891/e-manuscripta-159197
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
84 10 23 D 9.7 342.8
85 4 7 C 14.4 21.4
2 14 30