Sunspot drawing of 1987-12-18

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https://doi.org/10.7891/e-manuscripta-142799



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1987-12-18
10:00
Hs 1304.6:2081
https://doi.org/10.7891/e-manuscripta-142799
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
146 3 4 B -25 104
147 3 8 J -33 65
150 2 3 B -32 56
151 3 5 C 23 14
4 11 20