Sunspot drawing of 1987-12-7

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https://doi.org/10.7891/e-manuscripta-142941



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1987-12-07
08:30
Hs 1304.6:2072
https://doi.org/10.7891/e-manuscripta-142941
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
141 11 22 D -21 237
142 4 6 C 26 241
2 15 28