Sunspot drawing of 1975-8-18

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https://doi.org/10.7891/e-manuscripta-98138



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1975-08-18
07:15
Hs 1304.5:5767
https://doi.org/10.7891/e-manuscripta-98138
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
70 2 A -7.1 170.3
72 7 B -11.9 103.0
2 9