Sunspot drawing of 1987-12-23

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https://doi.org/10.7891/e-manuscripta-142833



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1987-12-23
09:00
Hs 1304.6:2086
https://doi.org/10.7891/e-manuscripta-142833
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
147 2 3 J -34 62
150A 3 3 B -39 44
2 5 6