Sunspot drawing of 1997-9-20

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https://doi.org/10.7891/e-manuscripta-149675



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1997-09-20
07:15
Hs 1304.6:5111
https://doi.org/10.7891/e-manuscripta-149675
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
81 4 7 C 26 227
1 4 7