Sunspot drawing of 1977-4-13

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https://doi.org/10.7891/e-manuscripta-98758



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1977-04-13
07:30
Hs 1304.5:6264
https://doi.org/10.7891/e-manuscripta-98758
Observer : Sergio Cortesi
Seeing (SIDC) : 2
Group Not Weighted Weighted Type Latitude Carrington Longit.
32 16 D -21.2 23.7
1 16