Sunspot drawing of 1974-9-8

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https://doi.org/10.7891/e-manuscripta-97782



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1974-09-08
07:15
Hs 1304.5:5476
https://doi.org/10.7891/e-manuscripta-97782
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
142 3 J -7.1 20.5
143 3 J -3.1 346.6
146 2 A -12.3 3.2
147 4 B -13.9 338.1
4 12