Sunspot drawing of 1969-4-20

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https://doi.org/10.7891/e-manuscripta-95913



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1969-04-20
09:45
Hs 1304.5:3814
https://doi.org/10.7891/e-manuscripta-95913
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
136 11 D -7.2 113.5
141 17 D 8.0 89.6
143 3 J -15.3 60.9
145 8 A 20.7 84.2
146 27 H 21.2 58.4
148 34 D -15.3 92.1
150 8 C -20.8 60.6
152 3 A 22.1 43.2
154 2 A 14.3 86.1
155 7 B -10.9 41.5
10 120