Sunspot drawing of 1977-4-23

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https://doi.org/10.7891/e-manuscripta-98698



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1977-04-23
09:00
Hs 1304.5:6273
https://doi.org/10.7891/e-manuscripta-98698
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
32 5 C -19.9 23.7
34 5 B -21.9 13.3
2 10