Sunspot drawing of 1961-2-20

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https://doi.org/10.7891/e-manuscripta-92549



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1961-02-20
07:30
Hs 1304.5:1270
https://doi.org/10.7891/e-manuscripta-92549
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
41 3 3 J 6.6 128.8
44 21 13 C -11.8 105.2
2 24 16