Sunspot drawing of 2017-10-21

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https://doi.org/10.7891/e-manuscripta-159581



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2017-10-21
09:00
Hs 1304.6:11069
https://doi.org/10.7891/e-manuscripta-159581
Observer : Andrea Manna
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
87 1 3 J -10.4 130.1
1 1 3