Sunspot drawing of 1991-12-28

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https://doi.org/10.7891/e-manuscripta-145919



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1991-12-28
08:30
Hs 1304.6:3346
https://doi.org/10.7891/e-manuscripta-145919
Observer : Sergio Cortesi
Seeing (SIDC) : 2
Group Not Weighted Weighted Type Latitude Carrington Longit.
665 11 40 D -14 143
667 29 60 F -17 98
668 11 30 E -14 78
670 3 6 J -4 59
4 54 136