Sunspot drawing of 1971-10-21

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https://doi.org/10.7891/e-manuscripta-96703



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1971-10-21
08:30
Hs 1304.5:4606
https://doi.org/10.7891/e-manuscripta-96703
Observer : Sergio Cortesi
Seeing (SIDC) : 2
Group Not Weighted Weighted Type Latitude Carrington Longit.
291 52 E 8.0 210.1
293 4 B 17.7 187.2
295 6 B -12.2 204.0
296 3 J -5.8 131.4
4 65