Sunspot drawing of 1974-8-21

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https://doi.org/10.7891/e-manuscripta-97687



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1974-08-21
07:30
Hs 1304.5:5460
https://doi.org/10.7891/e-manuscripta-97687
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
135 3 J -14.5 256.1
137 14 B -11.4 259.8
138 7 J 1.7 182.9
139 2 B -2.6 245.0
4 26