Sunspot drawing of 1961-12-20

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https://doi.org/10.7891/e-manuscripta-92664



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1961-12-20
09:00
Hs 1304.5:1539
https://doi.org/10.7891/e-manuscripta-92664
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
336 1 2 A 12.9 66.7
337 4 5 C -4.4 23.7
2 5 7