Sunspot drawing of 1987-12-16

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https://doi.org/10.7891/e-manuscripta-142881



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1987-12-16
09:15
Hs 1304.6:2079
https://doi.org/10.7891/e-manuscripta-142881
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
146 9 14 B -26 101
147 8 12 H -33 66
150 9 12 C -33 54
3 26 38