Sunspot drawing of 1972-4-28

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https://doi.org/10.7891/e-manuscripta-97007



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1972-04-28
08:45
Hs 1304.5:4737
https://doi.org/10.7891/e-manuscripta-97007
Observer : Sergio Cortesi
Seeing (SIDC) : 2
Group Not Weighted Weighted Type Latitude Carrington Longit.
126 3 J -10.0 316.9
132 3 C 16.4 250.4
135 3 A -12.9 276.6
137 4 A 3.8 237.1
139 23 D 9.0 300.7
141A 3 C 16.4 250.4
142 2 A 5.8 227.5
7 41