Sunspot drawing of 1961-4-18

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https://doi.org/10.7891/e-manuscripta-92497



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1961-04-18
07:45
Hs 1304.5:1325
https://doi.org/10.7891/e-manuscripta-92497
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
98 33 22 D 13.8 141.4
99 8 8 C 2.9 130.8
103 1 3 J 8.3 66.0
104 7 7 D -11.9 64.2
106 1 3 J -10.1 51.8
107 3 3 A -0.8 170.5
6 53 46