Sunspot drawing of 1971-5-20

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https://doi.org/10.7891/e-manuscripta-96795



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1971-05-20
06:45
Hs 1304.5:4459
https://doi.org/10.7891/e-manuscripta-96795
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
149 8 J 4.2 132.5
157 6 J 16.3 58.9
158 3 J 14.3 39.2
159 2 A 6.4 29.9
160 3 B 12.9 31.4
5 22