Sunspot drawing of 1977-8-11

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https://doi.org/10.7891/e-manuscripta-98881



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1977-08-11
07:00
Hs 1304.5:6366
https://doi.org/10.7891/e-manuscripta-98881
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
87 21 D 23.2 327.0
89 4 B -17.4 8.9
2 25