Sunspot drawing of 1961-7-31

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https://doi.org/10.7891/e-manuscripta-92661



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1961-07-31
07:00
Hs 1304.5:1419
https://doi.org/10.7891/e-manuscripta-92661
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
209 5 C 7.6 263.7
219 5 C 14.2 148.1
220 3 B -21.2 148.6
221 5 C 22.5 204.4
4 18