emamajek on 17-Feb-2019 22:41:12 GMT about HD 213240
HD 213240 (WDS J22310-4926A) has a common proper motion companion "C" (WDS J22310-4926C) at separation 95", however component "B" (WDS J22310-4926B; sep = 22") is an unrelated background star (following 2005A&A...440.1051M). Gaia DR2 astrometry for WDS J22310-4926 components:
WDS J22310-4926A:
plx = 24.4385 +- 0.0372 mas, pmRA,pmDec = -136.026, -193.926 (+-0.047, 0.052) mas/yr
WDS J22310-4926B = Gaia DR2 6517058786540366848:
plx = 2.8299 +- 0.0324 mas, pmRA,pmDec = 59.644, -14.634 (+- 0.044, 0.046) mas/yr
WDS J22310-4926C = Gaia DR2 6517058722116295936:
plx = 24.2253 +- 0.1023 mas, pmRA,pmDec = -137.587, -191.882 (+- 0.119, 0.137) mas/yr
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