Sunspot drawing of 1974-9-3

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https://doi.org/10.7891/e-manuscripta-97674



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1974-09-03
09:45
Hs 1304.5:5472
https://doi.org/10.7891/e-manuscripta-97674
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
142 3 J -7.7 21.1
143 3 J -3.4 345.6
2 6