Sunspot drawing of 2017-4-15

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https://doi.org/10.7891/e-manuscripta-159557



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2017-04-15
07:45
Hs 1304.6:10907
https://doi.org/10.7891/e-manuscripta-159557
Observer : Andrea Manna
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
30 1 1 A 7.6 188.4
31 1 1 A 11.8 187.1
2 2 2