Sunspot drawing of 1975-8-21

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https://doi.org/10.7891/e-manuscripta-98022



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1975-08-21
12:30
Hs 1304.5:5770
https://doi.org/10.7891/e-manuscripta-98022
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
70 4 B -5.7 171.7
73 6 B 26.2 170.8
75 4 B 6.9 80.1
3 14