Sunspot drawing of 1975-8-20

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https://doi.org/10.7891/e-manuscripta-98142



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1975-08-20
07:30
Hs 1304.5:5769
https://doi.org/10.7891/e-manuscripta-98142
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
72 1 A -12.4 103.7
73 8 B 26.9 167.6
74 3 B 7.5 90.6
3 12