Sunspot drawing of 1971-10-18

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https://doi.org/10.7891/e-manuscripta-96926



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1971-10-18
07:30
Hs 1304.5:4603
https://doi.org/10.7891/e-manuscripta-96926
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
291 29 D 8.2 210.0
292 1 A 8.2 272.1
2 30