Sunspot drawing of 1971-5-18

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https://doi.org/10.7891/e-manuscripta-96789



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1971-05-18
10:30
Hs 1304.5:4457
https://doi.org/10.7891/e-manuscripta-96789
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
149 10 J 5.0 131.3
150 4 B -4.7 190.5
154 3 J 11.8 145.1
157 3 J 16.4 58.9
158 3 J 14.3 38.4
5 23