emamajek on 25-Dec-2018 00:06:26 GMT about HIP 85605
HIP 85605
Cross-identification: Gaia DR2 4569804490949771520
plx = 1.8221 +- 0.0265 mas (Gaia DR2)
I recommend updating the parallax from the revised Hipparcos parallax (146.84 +- 29.81 mas) - which erroneously places this star among the Sun's nearest neighbors (~6.8 pc) - and replacing it with the Gaia DR2 parallax. The erroneous revised Hipparcos astrometry led to incorrect conclusions about the future trajectory of the star (https://www.aanda.org/articles/aa/abs/2015/03/aa25221-14/aa25221-14.html), with suggestions that it had the closest known future encounter with the solar system.
The Gaia DR2 astrometry shows that the star is indeed much more distant (~540 pc), and will not be passing near the Sun anytime soon.
The Gaia DR2 astrometry confirms the conclusion in the WDS notes that the pair WDS J17296+2439 is likely to be unphysical:
WDS 17296+2439A = HIP 85607 = Gaia DR2 4569804486654514816:
RA = 262.40609982401 deg (+-0.0141 mas)
Dec = +24.65683784381 deg (+-0.0203 mas)
plx = 2.4391 +- 0.0255 mas
pmRA = -10.317 +- 0.032 mas/yr
pmDec = 2.864 +- 0.044 mas/yr
WDS 17296+2439B = HIP 85605 = Gaia DR2 4569804490949771520:
RA = 262.40118059767 deg (+-0.0145 mas)
Dec = +24.65302159391 deg (+-0.0207 mas)
plx = 1.8221 +- 0.0265 mas
pmRA = 4.751 +- 0.031 mas/yr
pmDec = -8.628 +- 0.043 mas/yr
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