Sunspot drawing of 1976-4-20

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https://doi.org/10.7891/e-manuscripta-98373



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1976-04-20
07:30
Hs 1304.5:5968
https://doi.org/10.7891/e-manuscripta-98373
Observer : Araldo Pittini
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
15 3 H 1.6 208.8
17 4 J 4.3 140.0
18 13 B -9.2 125.8
3 20