Sunspot drawing of 1974-4-18

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https://doi.org/10.7891/e-manuscripta-97852



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1974-04-18
08:15
Hs 1304.5:5346
https://doi.org/10.7891/e-manuscripta-97852
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
42 21 D -13.7 165.7
44 4 A -8.4 56.9
47 22 B -13.0 124.5
48 5 B -9.3 118.3
49 2 A -8.0 75.8
5 54