Sunspot drawing of 1971-2-23

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https://doi.org/10.7891/e-manuscripta-96744



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1971-02-23
08:30
Hs 1304.5:4386
https://doi.org/10.7891/e-manuscripta-96744
Observer : Sergio Cortesi
Seeing (SIDC) : 2
Group Not Weighted Weighted Type Latitude Carrington Longit.
51 3 J 19.2 215.2
54 3 J -13.2 201.8
55 4 C -13.2 187.2
56 37 E -17.6 138.6
57 10 H -7.5 126.7
60 3 J -9.6 107.3
62 14 D 6.5 70.8
7 74