Sunspot drawing of 1971-9-20

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https://doi.org/10.7891/e-manuscripta-96692



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1971-09-20
08:00
Hs 1304.5:4577
https://doi.org/10.7891/e-manuscripta-96692
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
267 1 A 11.4 318.2
269 6 A 12.5 292.3
270 6 J 4.9 280.4
271 17 D -11.3 278.3
273 2 A -1.9 243.1
274 1 A -6.1 231.3
6 33