Sunspot drawing of 1987-1-21

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https://doi.org/10.7891/e-manuscripta-142995



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1987-01-21
09:15
Hs 1304.6:1811
https://doi.org/10.7891/e-manuscripta-142995
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
4A 9 11 B -25 125
1 9 11