Sunspot drawing of 1971-6-21

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https://doi.org/10.7891/e-manuscripta-96920



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1971-06-21
09:15
Hs 1304.5:4488
https://doi.org/10.7891/e-manuscripta-96920
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
179 1 A -10.7 34.9
180 4 B -12.2 82.3
185 8 B 10.1 343.6
186 5 B -19.0 351.4
4 18