Sunspot drawing of 1971-10-15

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https://doi.org/10.7891/e-manuscripta-96650



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1971-10-15
07:45
Hs 1304.5:4600
https://doi.org/10.7891/e-manuscripta-96650
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
289 2 A 13.9 298.1
290 7 B -13.0 330.3
2 9