# X1 Centauri

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Star in the constellation Centaurus

For other stars with this [Bayer designation](/source/Bayer_designation), see [x Centauri](/source/X_Centauri).

x1 Centauri Observation data Epoch J2000 Equinox J2000 Constellation Centaurus[1] Right ascension 12h 23m 35.420s[2] Declination −35° 24′ 45.64″[2] Apparent magnitude (V) 5.32[1] Characteristics Spectral type B8/9V[3] B−V color index −0.08[4] Astrometry Radial velocity (Rv) −10.00[5] km/s Proper motion (μ) RA: −42.132 mas/yr[2] Dec.: −6.896 mas/yr[2] Parallax (π) 7.3671±0.0953 mas[2] Distance 443 ± 6 ly (136 ± 2 pc) Absolute magnitude (MV) −0.2[6] Details Mass 3[7] M☉ Radius 3.6[8] R☉ Luminosity 265[9] L☉ Temperature 11,300[7] K Age 0.151[7] Gyr Other designations x1 Cen, CD−34°8117, GC 16892, HD 107832, HIP 60449, HR 4712, SAO 203420, G 113 G. Cen[9][10] Database references SIMBAD data

**x1 Centauri** is a [star](/source/Star) located in the [constellation](/source/Constellation) [Centaurus](/source/Centaurus_(constellation)). Its name is a [Bayer designation](/source/Bayer_designation); it is also known by its designations **HD 107832** and **HR 4712**. The [apparent magnitude](/source/Apparent_magnitude) of the [star](/source/Star) is about 5.32,[1] meaning it is only visible to the [naked eye](/source/Naked_eye) under [excellent viewing conditions](/source/Bortle_scale). Its distance is about 443 [light-years](/source/Light-year) (136 [pc](/source/Parsec)) from Earth based on [parallax](/source/Stellar_parallax) measurements.[2]

x1 Centauri's [spectral type](/source/Spectral_type) is B8/9V, meaning it is a late [B-type main sequence star](/source/B-type_main_sequence_star). These types of stars are a few times more massive than the [Sun](/source/Sun), and have [effective temperatures](/source/Effective_temperature) of about 10,000 to 30,000 [K](/source/Kelvin). x1 Centauri is just over 3 times more massive than the Sun[7] and has a temperature of about 11,300 K.[7] The star [x2 Centauri](/source/X2_Centauri), which lies about 0.4′ away from x1 Centauri, may or may not form a physical [binary star](/source/Binary_star) system with x1 Centauri, as the two have similar [proper motions](/source/Proper_motion) and distances.[10][11]

## References

1. ^ [***a***](#cite_ref-Anderson_Francis_2012_1-0) [***b***](#cite_ref-Anderson_Francis_2012_1-1) [***c***](#cite_ref-Anderson_Francis_2012_1-2) 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=60449&-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) 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%3D6157932866997543296%26-go+%25%23Sesame%23%25%26) at [VizieR](/source/VizieR).

1. **[^](#cite_ref-houk1979_3-0)** Houk, Nancy (1979). *Michigan catalogue of two-dimensional spectral types for the HD stars*. Vol. 3. Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan. [Bibcode](/source/Bibcode_(identifier)):[1982mcts.book.....H](https://ui.adsabs.harvard.edu/abs/1982mcts.book.....H).

1. **[^](#cite_ref-UBV_4-0)** Johnson, H. L.; et al. (1966). "Ubvrijkl Photometry of the Bright Stars". *Communications of the Lunar and Planetary Laboratory*. **4**: 99–110. [Bibcode](/source/Bibcode_(identifier)):[1966CoLPL...4...99J](https://ui.adsabs.harvard.edu/abs/1966CoLPL...4...99J).

1. **[^](#cite_ref-RV_5-0)** Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". *Astronomy Letters*. **32** (11): 759–771. [arXiv](/source/ArXiv_(identifier)):[1606.08053](https://arxiv.org/abs/1606.08053). [Bibcode](/source/Bibcode_(identifier)):[2006AstL...32..759G](https://ui.adsabs.harvard.edu/abs/2006AstL...32..759G). [doi](/source/Doi_(identifier)):[10.1134/S1063773706110065](https://doi.org/10.1134%2FS1063773706110065). [S2CID](/source/S2CID_(identifier)) [119231169](https://api.semanticscholar.org/CorpusID:119231169).

1. **[^](#cite_ref-6)** Jaschek, C.; Gomez, A. E. (1998). "The absolute magnitude of the early type MK standards from HIPPARCOS parallaxes". *Astronomy and Astrophysics*. **330** (619–625): 619. [Bibcode](/source/Bibcode_(identifier)):[1998A&A...330..619J](https://ui.adsabs.harvard.edu/abs/1998A&A...330..619J).

1. ^ [***a***](#cite_ref-grosbol_7-0) [***b***](#cite_ref-grosbol_7-1) [***c***](#cite_ref-grosbol_7-2) [***d***](#cite_ref-grosbol_7-3) [***e***](#cite_ref-grosbol_7-4) Grosbol, P. J. (1978). "Space velocities and ages of nearby early-type stars". *Astronomy and Astrophysics Supplement Series*. **32**: 409–421. [Bibcode](/source/Bibcode_(identifier)):[1978A&AS...32..409G](https://ui.adsabs.harvard.edu/abs/1978A&AS...32..409G).

1. **[^](#cite_ref-cadars_8-0)** Pasinetti Fracassini, L. E.; et al. (2001). "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Comments and statistics". *Astronomy & Astrophysics*. **367** (2) (Third ed.): 521–24. [arXiv](/source/ArXiv_(identifier)):[astro-ph/0012289](https://arxiv.org/abs/astro-ph/0012289). [Bibcode](/source/Bibcode_(identifier)):[2001A&A...367..521P](https://ui.adsabs.harvard.edu/abs/2001A&A...367..521P). [doi](/source/Doi_(identifier)):[10.1051/0004-6361:20000451](https://doi.org/10.1051%2F0004-6361%3A20000451). [S2CID](/source/S2CID_(identifier)) [425754](https://api.semanticscholar.org/CorpusID:425754).

1. ^ [***a***](#cite_ref-devancoleurs_9-0) [***b***](#cite_ref-devancoleurs_9-1) de Vaucouleurs, A. (1957). ["Spectral types and luminosities of B, A and F southern stars"](https://doi.org/10.1093%2Fmnras%2F117.4.449). *Monthly Notices of the Royal Astronomical Society*. **117** (4): 449. [Bibcode](/source/Bibcode_(identifier)):[1957MNRAS.117..449D](https://ui.adsabs.harvard.edu/abs/1957MNRAS.117..449D). [doi](/source/Doi_(identifier)):[10.1093/mnras/117.4.449](https://doi.org/10.1093%2Fmnras%2F117.4.449).

1. ^ [***a***](#cite_ref-SIMBAD_10-0) [***b***](#cite_ref-SIMBAD_10-1) ["* x1 Cen"](http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=%2A+x1+Cen). *[SIMBAD](/source/SIMBAD)*. [Centre de données astronomiques de Strasbourg](/source/Centre_de_donn%C3%A9es_astronomiques_de_Strasbourg). Retrieved 15 January 2016.

1. **[^](#cite_ref-11)** ["* x2 Cen"](http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=%2A+x2+Cen). *[SIMBAD](/source/SIMBAD)*. [Centre de données astronomiques de Strasbourg](/source/Centre_de_donn%C3%A9es_astronomiques_de_Strasbourg). Retrieved 16 January 2017.

v t e Constellation of Centaurus List of stars in Centaurus Centaurus in Chinese astronomy Stars Bayer α A (Rigil Kentaurus) B (Toliman) C (Proxima Centauri) β (Hadar) γ δ ε ζ (Leepwal) η θ (Menkent) ι (Kulou) κ λ μ ν (Heng) ξ1 ξ2 ο1 ο2 π ρ σ τ υ1 υ2 φ χ ψ x1 x2 C3 D E F G H J K M N Q Flamsteed 1 (i) 2 (g) 3 (k) 4 (h) Variable R T V Y RR SV SX BV DY UY V346 V553 V744 V752 V761 (a) V763 (C1) V766 V779 (Krzemiński's star) V803 V810 V816 (Przybylski's Star) V831 V842 V885 V886 V863 V1032 V1369 V1400 V1935 HR 4460 (A) 4466 (C2) 4499 4522 4523 4537 (j) 4546 (B) 4721 4748 (u) 4796 4817 (l) 4831 (w) 4874 (p) 4888 (e) 4889 (n) 4940 (f) 4979 4989 5006 (r) 5041 (m) 5089 (d) 5174 (z) 5222 (y) 5224 5241 5297 5358 (v) 5371 5471 (b) 5485 (c1) 5489 (c2) HD 97413 98176 100453 101581 101930 102117 (Uklun) 103197 107914 108236 109749 110113 113538 113766 114386 114729 115600 116434 (Matza) 117207 117618 (Dofida) 117939 120411 121228 121504 124448 (Popper's Star) 125072 125595 131399 Other 2MASS J1126−5003 2M1207 Gaia BH2 HD 131399 Ab PSR B1259−63 PSR J1311−3430 TOI-763 WASP-15 (Nyamien) WASP-41 WASP-42 WASP-167/KELT-13 Exoplanets 2M1207b b Centauri b HD 101930 b HD 102117 b (Leklsullun) HD 103197 b HD 109749 b HD 113538 b c HD 114386 b HD 114729 b HD 117207 b HD 117618 b (Noifasui) HD 121504 b HIP 65426 b (Najsakopajk) HIP 67522 b NGTS-13b Proxima Centauri b c d WASP-15b (Asye) Star clusters NGC 3766 4230 4507 5281 5286 5316 5460 5617 5662 Other IC 2944 ω Centauri Scorpius–Centaurus association Stock 16 Nebulae NGC 3918 5307 Other Boomerang Nebula Fleming 1 G292.0+1.8 G306.3-0.9 Gum 41 IC 2944 IRAS 13208−6020 RCW 79 RCW 86 Southern Crab Nebula SuWt 2 Galaxies NGC 3557 3568 3749 3783 4444 4603 4622 4650A 4683 4696 4706 4709 4729 4730 4743 4744 4909 4930 4945 4976 5011 A 5026 5064 5082 5090 5091 5102 5114 5121 5128 (Centaurus A) 5161 5206 5253 5266 5291 5398 5408 5419 5483 5516 Other ESO 269-57 ESO 325-4 ESO 383-76 ESO 444-46 Fourcade-Figueroa Object IC 3370 IC 4214 IC 4329A IRAS 13224−3809 J1144−4308 LEDA 677373 PKS 1144−379 PKS 1353−341 PKS 1424−418 Galaxy clusters Abell S740 Centaurus Cluster Shapley Supercluster Astronomical events GW190521 SN 185 SN 1895B (Z) SN 1972E SN 1986G J1407b SN 2019so Category

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Adapted from the Wikipedia article [X1 Centauri](https://en.wikipedia.org/wiki/X1_Centauri) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/X1_Centauri?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.