Sunspot drawing of 1977-4-3

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https://doi.org/10.7891/e-manuscripta-98613



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1977-04-03
13:30
Hs 1304.5:6256
https://doi.org/10.7891/e-manuscripta-98613
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
30 7 B 24.4 250.6
1 7