Sunspot drawing of 1987-12-24

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https://doi.org/10.7891/e-manuscripta-142882



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1987-12-24
08:30
Hs 1304.6:2087
https://doi.org/10.7891/e-manuscripta-142882
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
147 1 3 J -34 61
150A 2 1 A -37 40
2 3 4