Sunspot drawing of 1987-12-17

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https://doi.org/10.7891/e-manuscripta-142913



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1987-12-17
09:45
Hs 1304.6:2080
https://doi.org/10.7891/e-manuscripta-142913
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
146 7 9 B -26 102
147 3 6 J -33 67
148A 3 2 A -20 67
150 4 7 B -32 57
4 17 24