Sunspot drawing of 1975-9-17

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https://doi.org/10.7891/e-manuscripta-98084



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1975-09-17
07:30
Hs 1304.5:5790
https://doi.org/10.7891/e-manuscripta-98084
Observer : Araldo Pittini
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
81 3 J -8.9 168.5
89 3 A 8.4 87.7
2 6