Sunspot drawing of 1974-4-17

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https://doi.org/10.7891/e-manuscripta-97928



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1974-04-17
07:30
Hs 1304.5:5345
https://doi.org/10.7891/e-manuscripta-97928
Observer : Sergio Cortesi
Seeing (SIDC) : 2
Group Not Weighted Weighted Type Latitude Carrington Longit.
40 18 D -14.3 181.2
42 22 D -13.9 165.1
43 12 D -8.5 182.7
44 5 A -8.2 56.2
47 5 B -12.8 123.0
48 1 A -9.4 117.9
6 63