Sunspot drawing of 1987-1-28

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https://doi.org/10.7891/e-manuscripta-143000



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1987-01-28
09:30
Hs 1304.6:1818
https://doi.org/10.7891/e-manuscripta-143000
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
8 5 8 B 13 358
9 4 7 B -38 332
2 9 15