Sunspot drawing of 2017-9-17

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https://doi.org/10.7891/e-manuscripta-159374



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2017-09-17
10:15
Hs 1304.6:11038
https://doi.org/10.7891/e-manuscripta-159374
Observer : Andrea Manna
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
78 5 9 C 7.7 315.7
1 5 9