Sunspot drawing of 1974-9-10

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https://doi.org/10.7891/e-manuscripta-97966



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1974-09-10
07:45
Hs 1304.5:5478
https://doi.org/10.7891/e-manuscripta-97966
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
142 3 J -7.6 20.3
143 5 J -3.0 345.2
144 21 C 6.7 17.5
148 2 A -19.4 335.6
149 19 H 7.5 264.8
150 11 E -13.3 260.8
6 61