croald on 12-Sep-2019 21:52:15 GMT about * alf Cen B
There is something weird in the parallaxes from Hipparcos 2007 reduction (2007A&A...474..653V). alf Cen B is given parallax 796.92, placing it nearer to us than either Proxima (771.64) or its spectroscopic binary sibling alf Cen A (754.81).
Pourbaix & Boffin 2016A&A...586A..90P revisit the measurement and come up with 743 ± 1.3 mas for alf Cen A&B.
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View annotation on * alf Cen B object