Sunspot drawing of 1984-12-21

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https://doi.org/10.7891/e-manuscripta-141112



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1984-12-21
09:30
Hs 1304.6:1189
https://doi.org/10.7891/e-manuscripta-141112
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
233 3 4 J 18 145
1 3 4