Sunspot drawing of 1983-12-20

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https://doi.org/10.7891/e-manuscripta-140517



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1983-12-20
08:45
Hs 1304.6:888
https://doi.org/10.7891/e-manuscripta-140517
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
319 9 10 C -9 260
320 12 24 C -10 267
321 3 2 A 20 271
3 24 36