Sunspot drawing of 2019-4-20

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https://doi.org/10.7891/e-manuscripta-160514



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2019-04-20
10:30
Hs 1304.6:11499
https://doi.org/10.7891/e-manuscripta-160514
Observer : Andrea Manna
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
14 2 3 B 4.5 261.0
1 2 3