Sunspot drawing of 1964-12-28

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https://doi.org/10.7891/e-manuscripta-94096



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1964-12-28
15:00
Hs 1304.5:2475
https://doi.org/10.7891/e-manuscripta-94096
Observer : Sergio Cortesi
Seeing (SIDC) : 2
Group Not Weighted Weighted Type Latitude Carrington Longit.
90 3 J 33.5 347.9
92 10 D 22.4 259.0
93 2 A -0.2 258.1
3 15