Sunspot drawing of 1971-5-17

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https://doi.org/10.7891/e-manuscripta-96756



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1971-05-17
07:30
Hs 1304.5:4456
https://doi.org/10.7891/e-manuscripta-96756
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
146 3 B 2.7 156.7
149 13 C 4.2 131.0
150 4 B -6.1 188.8
152 2 A 18.0 195.2
154 4 C 11.9 144.1
155 2 A -15.5 119.1
157 3 J 16.4 58.6
7 31