Sunspot drawing of 2019-4-12

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https://doi.org/10.7891/e-manuscripta-160586



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2019-04-12
07:30
Hs 1304.6:11491
https://doi.org/10.7891/e-manuscripta-160586
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
12 3 7 C 5.0 297.9
1 3 7