Sunspot drawing of 1971-2-20

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https://doi.org/10.7891/e-manuscripta-96782



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1971-02-20
08:00
Hs 1304.5:4383
https://doi.org/10.7891/e-manuscripta-96782
Observer : Sergio Cortesi
Seeing (SIDC) : 2
Group Not Weighted Weighted Type Latitude Carrington Longit.
51 6 D 17.7 216.4
54 3 J -13.4 201.8
55 6 C -13.3 186.9
56 28 E -17.7 140.6
57 11 C -6.9 126.0
58 5 B 20.7 232.1
59 3 B 9.8 196.1
60 3 J -9.8 105.4
8 65