Sunspot drawing of 1964-4-17

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https://doi.org/10.7891/e-manuscripta-93907



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1964-04-17
07:00
Hs 1304.5:2249
https://doi.org/10.7891/e-manuscripta-93907
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
36 2 B -13.4 91.8
37 1 A -0.8 70.1
2 3