Sunspot drawing of 1961-4-20

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https://doi.org/10.7891/e-manuscripta-92608



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1961-04-20
07:00
Hs 1304.5:1327
https://doi.org/10.7891/e-manuscripta-92608
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
98 10 8 C 13.2 142.5
99 5 5 C 1.3 130.0
103 3 5 C 7.7 64.9
104 2 3 B -12.5 63.9
106 2 4 J -9.8 53.7
108 3 6 C 8.7 123.6
109 3 2 A -16.5 69.1
7 28 33