Sunspot drawing of 1977-4-2

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https://doi.org/10.7891/e-manuscripta-98848



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1977-04-02
07:00
Hs 1304.5:6255
https://doi.org/10.7891/e-manuscripta-98848
Observer : Sergio Cortesi
Seeing (SIDC) : 2
Group Not Weighted Weighted Type Latitude Carrington Longit.
30 7 B 25.0 248.5
1 7