Sunspot drawing of 1977-2-21

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https://doi.org/10.7891/e-manuscripta-98797



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1977-02-21
10:30
Hs 1304.5:6224
https://doi.org/10.7891/e-manuscripta-98797
Observer : Araldo Pittini
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
21 5 J -19.0 54.7
1 5