Sunspot drawing of 1997-2-20

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https://doi.org/10.7891/e-manuscripta-149669



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1997-02-20
08:30
Hs 1304.6:4916
https://doi.org/10.7891/e-manuscripta-149669
Observer : Sergio Cortesi
Seeing (SIDC) : 3
No group