Sunspot drawing of 1997-5-20

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https://doi.org/10.7891/e-manuscripta-149818



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1997-05-20
09:30
Hs 1304.6:5000
https://doi.org/10.7891/e-manuscripta-149818
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
30 17 25 C 5 16
33 8 13 C 28 69
34 2 4 J -34 308
3 27 42