Sunspot drawing of 1974-9-13

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https://doi.org/10.7891/e-manuscripta-97694



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1974-09-13
07:30
Hs 1304.5:5481
https://doi.org/10.7891/e-manuscripta-97694
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
143 6 J -3.3 346.1
144 6 B 9.1 15.2
149 45 D 8.0 266.6
150 20 C -11.6 267.6
151 3 J -15.3 254.9
5 80