Sunspot drawing of 1971-10-4

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https://doi.org/10.7891/e-manuscripta-96968



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1971-10-04
07:30
Hs 1304.5:4590
https://doi.org/10.7891/e-manuscripta-96968
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
280 5 H -5.9 132.5
281 4 B -5.7 116.8
282 11 C 10.1 79.6
285 1 A 20.8 18.5
4 21