Sunspot drawing of 1983-9-20

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https://doi.org/10.7891/e-manuscripta-140560



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1983-09-20
07:30
Hs 1304.6:810
https://doi.org/10.7891/e-manuscripta-140560
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
252 9 13 C -12 61
258 2 6 J -8 336
2 11 19