Sunspot drawing of 1971-8-20

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https://doi.org/10.7891/e-manuscripta-96674



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1971-08-20
14:00
Hs 1304.5:4547
https://doi.org/10.7891/e-manuscripta-96674
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
251 2 A 13.9 343.4
252 3 J 12.3 317.3
253 3 A -16.1 14.1
254 7 B 18.6 293.8
255 48 E -12.3 269.6
256 3 J -5.2 232.5
6 66