Sunspot drawing of 1997-4-23

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https://doi.org/10.7891/e-manuscripta-149657



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1997-04-23
07:00
Hs 1304.6:4976
https://doi.org/10.7891/e-manuscripta-149657
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
25 2 4 B 18 321
1 2 4