Sunspot drawing of 1977-4-6

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https://doi.org/10.7891/e-manuscripta-98670



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1977-04-06
07:30
Hs 1304.5:6259
https://doi.org/10.7891/e-manuscripta-98670
Observer : Araldo Pittini
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
31 4 B 17.9 242.7
1 4