# HR 5401

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Star in the constellation Lupus

HR 5401 Observation data Epoch J2000 Equinox J2000 Constellation Lupus[1] Right ascension 14h 27m 12.15415s[2] Declination −46° 08′ 03.0975″[2] Apparent magnitude (V) 5.83[1] Characteristics Evolutionary stage main sequence[2] Spectral type A1m A5/7-F2[3] B−V color index 0.311±0.004[1] Astrometry Radial velocity (Rv) −30.0±3.8[4] km/s Proper motion (μ) RA: −150.420[2] mas/yr Dec.: −88.472[2] mas/yr Parallax (π) 20.6065±0.4550 mas[2] Distance 158 ± 3 ly (49 ± 1 pc) Absolute magnitude (MV) +2.01[1] Details Luminosity 13.01[1] L☉ Surface gravity (log g) 3.92[5] cgs Temperature 7,300[5] K Metallicity [Fe/H] 0.2[5] dex Other designations CD−45°9188, HD 126504, HIP 70663, HR 5401, SAO 224929, WDS J14272-4608A[6] Database references SIMBAD data

**HR 5401** is a possible [astrometric binary](/source/Astrometric_binary)[7] [star](/source/Star) system in the southern [constellation](/source/Constellation) of [Lupus](/source/Lupus_(constellation)). With an [apparent visual magnitude](/source/Apparent_visual_magnitude) of 5.83,[1] 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](/source/Stellar_parallax) of 20.6 [mas](/source/Milliarcsecond),[2] yielding a range of 158 [light years](/source/Light_year). It is moving closer to Earth with a heliocentric [radial velocity](/source/Radial_velocity) of −30 km/s,[4] and is expected to come within 161 ly in ~524,000 years.[1]

This is an [Am star](/source/Am_star)[8] with a [stellar classification](/source/Stellar_classification) of A1m A5/7-F2.[3] Lu (1991) lists it as a likely dwarf [barium star](/source/Barium_star).[9] It is radiating 13[1] times the [Sun's luminosity](/source/Sun's_luminosity) from its [photosphere](/source/Photosphere) at an [effective temperature](/source/Effective_temperature) of 7,300 K.[5] This system is a source of [X-ray emission](/source/X-ray_astronomy) 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](/source/Angular_separation) of 33.1[″](/source/Second_of_arc) along a [position angle](/source/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]

## References

1. ^ [***a***](#cite_ref-Anderson2012_1-0) [***b***](#cite_ref-Anderson2012_1-1) [***c***](#cite_ref-Anderson2012_1-2) [***d***](#cite_ref-Anderson2012_1-3) [***e***](#cite_ref-Anderson2012_1-4) [***f***](#cite_ref-Anderson2012_1-5) [***g***](#cite_ref-Anderson2012_1-6) [***h***](#cite_ref-Anderson2012_1-7) Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". *[Astronomy Letters](/source/Astronomy_Letters)*. **38** (5): 331. [arXiv](/source/ArXiv_(identifier)):[1108.4971](https://arxiv.org/abs/1108.4971). [Bibcode](/source/Bibcode_(identifier)):[2012AstL...38..331A](https://ui.adsabs.harvard.edu/abs/2012AstL...38..331A). [doi](/source/Doi_(identifier)):[10.1134/S1063773712050015](https://doi.org/10.1134%2FS1063773712050015). [XHIP record for this object](https://vizier.cds.unistra.fr/viz-bin/VizieR-4?-ref=VIZ681510a8389ecb&-out.src=V%2F137D%2FXHIP&-nav=cat%3AV%2F137D%26tab%3A{V%2F137D%2FXHIP}%26key%3Asource%3DV%2F137D%2FXHIP%26HTTPPRM%3A&-source=V%2F137D%2FXHIP&-out=HIP&HIP=70663&-out=Comp&-out=Gr&-out=RAJ2000&-out=DEJ2000&-out=Dist&-out=X&-out=Y&-out=Z&-out=SpType&-out=Simbad&-out=Hpmag&-out=Lum&-out=Cst) at [VizieR](/source/VizieR).

1. ^ [***a***](#cite_ref-GaiaDR3_2-0) [***b***](#cite_ref-GaiaDR3_2-1) [***c***](#cite_ref-GaiaDR3_2-2) [***d***](#cite_ref-GaiaDR3_2-3) [***e***](#cite_ref-GaiaDR3_2-4) [***f***](#cite_ref-GaiaDR3_2-5) [***g***](#cite_ref-GaiaDR3_2-6) Vallenari, A.; et al. (Gaia collaboration) (2023). ["*Gaia* Data Release 3. Summary of the content and survey properties"](https://doi.org/10.1051%2F0004-6361%2F202243940). *Astronomy and Astrophysics*. **674**: A1. [arXiv](/source/ArXiv_(identifier)):[2208.00211](https://arxiv.org/abs/2208.00211). [Bibcode](/source/Bibcode_(identifier)):[2023A&A...674A...1G](https://ui.adsabs.harvard.edu/abs/2023A&A...674A...1G). [doi](/source/Doi_(identifier)):[10.1051/0004-6361/202243940](https://doi.org/10.1051%2F0004-6361%2F202243940). [S2CID](/source/S2CID_(identifier)) [244398875](https://api.semanticscholar.org/CorpusID:244398875). [Gaia DR3 record for this source](https://vizier.cds.unistra.fr/viz-bin/VizieR-4?-source=+I%2F355&-from=nav&-nav=cat%3AI%2F355%26tab%3A%7BI%2F355%2Fgaiadr3%7D%26key%3Asource%3D1355%2Fgaiadr3%26HTTPPRM%3A%26-out.add%3D.%26Source%3D%3D%3D6093066628770287104%26-go+%25%23Sesame%23%25%26) at [VizieR](/source/VizieR).

1. ^ [***a***](#cite_ref-houk1978_3-0) [***b***](#cite_ref-houk1978_3-1) Houk, Nancy (1978), *Michigan catalogue of two-dimensional spectral types for the HD stars*, vol. 2, Ann Arbor: Dept. of Astronomy, University of Michigan, [Bibcode](/source/Bibcode_(identifier)):[1978mcts.book.....H](https://ui.adsabs.harvard.edu/abs/1978mcts.book.....H).

1. ^ [***a***](#cite_ref-deBruijne2012_4-0) [***b***](#cite_ref-deBruijne2012_4-1) de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", *Astronomy & Astrophysics*, **546**: 14, [arXiv](/source/ArXiv_(identifier)):[1208.3048](https://arxiv.org/abs/1208.3048), [Bibcode](/source/Bibcode_(identifier)):[2012A&A...546A..61D](https://ui.adsabs.harvard.edu/abs/2012A&A...546A..61D), [doi](/source/Doi_(identifier)):[10.1051/0004-6361/201219219](https://doi.org/10.1051%2F0004-6361%2F201219219), [S2CID](/source/S2CID_(identifier)) [59451347](https://api.semanticscholar.org/CorpusID:59451347), A61.

1. ^ [***a***](#cite_ref-North1994_5-0) [***b***](#cite_ref-North1994_5-1) [***c***](#cite_ref-North1994_5-2) [***d***](#cite_ref-North1994_5-3) North, P.; et al. (January 1994), "The nature of the F STR lambda 4077 stars. 3: Spectroscopy of the barium dwarfs and other CP stars", *Astronomy and Astrophysics*, **281** (3): 775–796, [Bibcode](/source/Bibcode_(identifier)):[1994A&A...281..775N](https://ui.adsabs.harvard.edu/abs/1994A&A...281..775N).

1. **[^](#cite_ref-SIMBAD_6-0)** ["HD 126504"](http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+126504). *[SIMBAD](/source/SIMBAD)*. [Centre de données astronomiques de Strasbourg](/source/Centre_de_donn%C3%A9es_astronomiques_de_Strasbourg). Retrieved 2018-07-30.

1. **[^](#cite_ref-Eggleton2008_7-0)** Eggleton, P. P.; Tokovinin, A. A. (2008), "A catalogue of multiplicity among bright stellar systems", *Monthly Notices of the Royal Astronomical Society*, **389** (2): 869, [arXiv](/source/ArXiv_(identifier)):[0806.2878](https://arxiv.org/abs/0806.2878), [Bibcode](/source/Bibcode_(identifier)):[2008MNRAS.389..869E](https://ui.adsabs.harvard.edu/abs/2008MNRAS.389..869E), [doi](/source/Doi_(identifier)):[10.1111/j.1365-2966.2008.13596.x](https://doi.org/10.1111%2Fj.1365-2966.2008.13596.x), [S2CID](/source/S2CID_(identifier)) [14878976](https://api.semanticscholar.org/CorpusID:14878976).

1. ^ [***a***](#cite_ref-Schroeder2007_8-0) [***b***](#cite_ref-Schroeder2007_8-1) Schröder, C.; Schmitt, J. H. M. M. (November 2007), "X-ray emission from A-type stars", *Astronomy and Astrophysics*, **475** (2): 677–684, [Bibcode](/source/Bibcode_(identifier)):[2007A&A...475..677S](https://ui.adsabs.harvard.edu/abs/2007A&A...475..677S), [doi](/source/Doi_(identifier)):[10.1051/0004-6361:20077429](https://doi.org/10.1051%2F0004-6361%3A20077429).

1. **[^](#cite_ref-lu1991_9-0)** Lu, Phillip K. (1991), "Taxonomy of barium stars", *Astronomical Journal*, **101**: 2229, [Bibcode](/source/Bibcode_(identifier)):[1991AJ....101.2229L](https://ui.adsabs.harvard.edu/abs/1991AJ....101.2229L), [doi](/source/Doi_(identifier)):[10.1086/115845](https://doi.org/10.1086%2F115845).

1. **[^](#cite_ref-wds2006_10-0)** Mason, B. D.; et al. (2008), "Washington Visual Double Star Catalog, 2006.5 (WDS)", *The Astronomical Journal*, **122** (6), U. S. Naval Observatory, Washington D.C.: 3466, [Bibcode](/source/Bibcode_(identifier)):[2001AJ....122.3466M](https://ui.adsabs.harvard.edu/abs/2001AJ....122.3466M), [doi](/source/Doi_(identifier)):[10.1086/323920](https://doi.org/10.1086%2F323920).

v t e Constellation of Lupus List of stars in Lupus Lupus in Chinese astronomy Stars Bayer α (Uridim) β γ δ ε ζ η θ ι κ λ μ ν1 ν2 ξ ο π ρ σ τ1 τ2 υ φ1 φ2 χ ψ1 ψ2 ω Flamsteed 1 (i) 2 (f) Variable RU EX GG GQ HR II IL IM KT (d) V407 V462 HR 5362 5364 5401 5651 (e) 5724 (k) 5825 (g) 5943 5967 HD 134004 135344 136164 141943 142527 143811 Other Gliese 588 HIP 70849 Lupus-TR-3 SSSPM J1549−3544 WASP-132 Exoplanets GQ Lupi b HIP 70849 b Lupus-TR-3b WASP-178b Star clusters NGC 5749 NGC 5822 NGC 5824 NGC 5927 NGC 5986 Nebulae IC 4406 NGC 5882 Galaxies IC 4444 NGC 5530 NGC 5643 Astronomical events SN 1006 Category

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