Sunspot drawing of 1964-4-21

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https://doi.org/10.7891/e-manuscripta-93968



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1964-04-21
11:15
Hs 1304.5:2251
https://doi.org/10.7891/e-manuscripta-93968
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
39 20 D -8.4 349.1
1 20