Sunspot drawing of 1964-2-21

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https://doi.org/10.7891/e-manuscripta-93869



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1964-02-21
13:00
Hs 1304.5:2213
https://doi.org/10.7891/e-manuscripta-93869
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
14 3 J -4.9 93.4
15 25 C 9.0 78.9
16 3 B 7.0 40.7
3 31