Sunspot drawing of 1971-6-20

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https://doi.org/10.7891/e-manuscripta-96738



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1971-06-20
07:00
Hs 1304.5:4487
https://doi.org/10.7891/e-manuscripta-96738
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
179 2 A -11.5 35.3
181 3 B -6.7 75.5
185 12 C 9.9 344.1
186 3 B -19.4 351.7
4 20