Sunspot drawing of 1971-9-21

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https://doi.org/10.7891/e-manuscripta-96905



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1971-09-21
07:45
Hs 1304.5:4578
https://doi.org/10.7891/e-manuscripta-96905
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
269 16 D 12.2 293.5
270 5 J 4.8 280.6
271 12 C -11.8 277.2
273 1 A -2.0 243.3
274 1 A -6.5 232.2
276 3 B 12.1 310.2
277 1 A 12.2 190.0
7 39