Sunspot drawing of 2017-4-12

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https://doi.org/10.7891/e-manuscripta-159552



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2017-04-12
07:00
Hs 1304.6:10904
https://doi.org/10.7891/e-manuscripta-159552
Observer : Marco Cagnotti
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
30 5 6 B 8.1 190.4
31 6 6 A 12.8 184.7
2 11 12