Sunspot drawing of 1987-12-28

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https://doi.org/10.7891/e-manuscripta-142856



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1987-12-28
09:00
Hs 1304.6:2091
https://doi.org/10.7891/e-manuscripta-142856
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
153 20 38 D -34 260
1 20 38