Sunspot drawing of 1971-4-28

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https://doi.org/10.7891/e-manuscripta-96869



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1971-04-28
08:15
Hs 1304.5:4440
https://doi.org/10.7891/e-manuscripta-96869
Observer : Araldo Pittini
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
132 4 B -9.9 45.6
133 5 B -12.8 35.1
134 20 D 6.6 29.2
135 8 C -5.1 345.4
4 37