Sunspot drawing of 1974-10-17

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https://doi.org/10.7891/e-manuscripta-97969



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1974-10-17
08:00
Hs 1304.5:5511
https://doi.org/10.7891/e-manuscripta-97969
Observer : Sergio Cortesi
Seeing (SIDC) : 2
Group Not Weighted Weighted Type Latitude Carrington Longit.
164 7 D 11.6 284.4
165 26 D 7.4 272.9
2 33