Sunspot drawing of 1984-2-20

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https://doi.org/10.7891/e-manuscripta-140913



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1984-02-20
09:00
Hs 1304.6:941
https://doi.org/10.7891/e-manuscripta-140913
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
35 40 50 D 15 113
36 5 15 D 10 88
2 45 65