HR 5401

HR 5401
Observation data
Epoch J2000      Equinox J2000
Constellation Lupus
Right ascension 14h 27m 12.18204s[1]
Declination −46° 08′ 58.1316″[1]
Apparent magnitude (V) 5.83[2]
Characteristics
Spectral type A1m A5/7-F2[3]
B−V color index 0.311±0.004[2]
Astrometry
Radial velocity (Rv)−30.0±3.8[4] km/s
Proper motion (μ) RA: −168.816[1] mas/yr
Dec.: −82.297[1] mas/yr
Parallax (π)15.8815 ± 0.2813 mas[1]
Distance205 ± 4 ly
(63 ± 1 pc)
Absolute magnitude (MV)2.01[2]
Details
Luminosity13.01[2] L☉
Surface gravity (log g)3.92[5] cgs
Temperature7,300[5] K
Metallicity [Fe/H]0.2[5] dex
Other designations
CD−45° 9188, HD 126504, HIP 70663, HR 5401, SAO 224929, WDS WDS J14272-4608A[6]
Database references
SIMBADdata

HR 5401 is a possible astrometric binary[7] star system in the southern constellation of Lupus. With an apparent visual magnitude of 5.83,[2] it is just visible to the naked eye under good seeing conditions. The distance to HR 5401 can be estimated from its annual parallax shift of 15.9 mas,[1] yielding a range of 205 light years. It is moving closer to Earth with a heliocentric radial velocity of −30 km/s,[4] and is expected to come within 161 ly in ~524,000 years.[2]

This is an Am star[8] with a stellar classification of A1m A5/7-F2.[3] Lu (1991) lists it as a likely dwarf barium star.[9] It is radiating 13[2] times the Sun's luminosity from its photosphere at an effective temperature of 7,300 K.[5] This system is a source of X-ray emission which may be coming from the companion.[8]

HR 5401 has two visual companions. Component B is a magnitude 11.50 star at an angular separation of 33.1″ along a position angle (PA) of 114°, as of 1999. The second companion, designated component C, is magnitude 11.16 with a separation of 27.20″ at a PA of 164°, as of 2000.[10]

  1. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e f g Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference houk1978 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference North1994 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Schroeder2007 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference lu1991 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference wds2006 was invoked but never defined (see the help page).