# N Centauri

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Binary star in the constellation Centaurus

For **n Centauri**, see [HD 111968](/source/HD_111968).

N Centauri Observation data Epoch J2000.0 Equinox ICRS Constellation Centaurus[1] A Right ascension 13h 52m 04.86231s[2] Declination −52° 48′ 41.5063″[2] Apparent magnitude (V) 5.26[3] B Right ascension 13h 52m 02.97130s[4] Declination −52° 48′ 35.7079″[4] Apparent magnitude (V) 7.49[5] Characteristics A Evolutionary stage main sequence[2] Spectral type B9V[6][7] B−V color index −0.084±0.003[3] B Evolutionary stage main sequence[4] Spectral type F0Vn[6][7] B−V color index +0.286±0.009[5] Astrometry A Radial velocity (Rv) +27.0±4.2[3] km/s Proper motion (μ) RA: −38.997[2] mas/yr Dec.: −26.863[2] mas/yr Parallax (π) 10.7449±0.0882 mas[2] Distance 304 ± 2 ly (93.1 ± 0.8 pc) Absolute magnitude (MV) +0.76[3] B Radial velocity (Rv) +11.17±0.46[4] km/s Proper motion (μ) RA: −38.997[4] mas/yr Dec.: −26.863[4] mas/yr Parallax (π) 10.7449±0.0882 mas[4] Distance 304 ± 2 ly (93.1 ± 0.8 pc) Details A Mass 3.04[8] M☉ Radius 2.458[8] R☉ Luminosity 70.18[3] L☉ Surface gravity (log g) 4.32±0.14[9] cgs Temperature 13,032±443[9] K Rotational velocity (v sin i) 205[9] km/s Age 66[9] Myr B Mass 1.48±0.01[10] M☉ Radius 1.61+0.08 −0.09[10] R☉ Luminosity 6.43[11] L☉ Surface gravity (log g) 4.29[12] cgs Temperature 7,354[11] K Metallicity [Fe/H] −0.01+0.17 −0.15[10] dex Age 1.07+1.56 −0.42[10] Gyr Other designations N Cen, CCDM J13521-5249, WDS J13521-5249[13] A: CPD−52°6787, GC 18720, HD 120642, HIP 67703, HR 5207, SAO 241239[13] B: CD−52°5831, GC 18718, HD 120641, HIP 67702, SAO 241238[14] Database references SIMBAD A B

**N Centauri** is a [binary star](/source/Binary_star)[15] in the southern [constellation](/source/Constellation) of [Centaurus](/source/Centaurus). The brighter star is dimly visible to the naked eye with an [apparent visual magnitude](/source/Apparent_visual_magnitude) of 5.26, and it is approximately 304 [light years](/source/Light_year) away based on [parallax](/source/Stellar_parallax). It has an [absolute magnitude](/source/Absolute_magnitude) of +0.76 and is drifting further away from the [Sun](/source/Sun) with a [radial velocity](/source/Radial_velocity) of +27 km/s. It is a candidate member of the [Sco OB2](/source/Sco_OB2) moving group.[16]

The double nature of this system was discovered by German astronomer [Carl Rümker](/source/Carl_Ludwig_Christian_R%C3%BCmker) in 1835. As of 2016, the companion lay at an [angular separation](/source/Angular_separation) of 18.5[″](/source/Second_of_arc) along a [position angle](/source/Position_angle) of 289° from the primary.[17] They form a co-moving pair with a projected separation of 1,566 [AU](/source/Astronomical_unit).[18] The more luminous member is a [B-type main-sequence star](/source/B-type_main-sequence_star) with a [stellar classification](/source/Stellar_classification) of B9V.[15] Its fainter companion is an [F-type main-sequence star](/source/F-type_main-sequence_star) with a class of F0Vn, where the 'n' suffix indicates that the metal [absorption lines](/source/Absorption_line) in its spectrum are unusual broad ("nebulous") and indicative of rapid rotation.[6][7] Based upon discrepancies in the proper motion measurements, there are hints of a third member of this system.[15]

## References

1. **[^](#cite_ref-constellation_1-0)** [Roman, Nancy G.](/source/Nancy_Roman) (1987). ["Identification of a constellation from a position"](https://doi.org/10.1086%2F132034). *[Publications of the Astronomical Society of the Pacific](/source/Publications_of_the_Astronomical_Society_of_the_Pacific)*. **99** (617): 695. [Bibcode](/source/Bibcode_(identifier)):[1987PASP...99..695R](https://ui.adsabs.harvard.edu/abs/1987PASP...99..695R). [doi](/source/Doi_(identifier)):[10.1086/132034](https://doi.org/10.1086%2F132034). [Constellation record for this object](https://vizier.cds.unistra.fr/viz-bin/VizieR-4?source=VI%2F42%2Fout&%2F%2Ftables=VI%2F42%2Fout&-c=N+Cen&-c.eq=J2000&-c.r=++2&-c.u=arcmin&-c.geom=r&-source=&-source=VI%2F42%2Fout&-out=RA1875&-out=DE1875&-out=Cst) at [VizieR](/source/VizieR).

1. ^ [***a***](#cite_ref-dr3a_2-0) [***b***](#cite_ref-dr3a_2-1) [***c***](#cite_ref-dr3a_2-2) [***d***](#cite_ref-dr3a_2-3) [***e***](#cite_ref-dr3a_2-4) [***f***](#cite_ref-dr3a_2-5) 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%3D6065984557860591360%26-go+%25%23Sesame%23%25%26) at [VizieR](/source/VizieR).

1. ^ [***a***](#cite_ref-xhipa_3-0) [***b***](#cite_ref-xhipa_3-1) [***c***](#cite_ref-xhipa_3-2) [***d***](#cite_ref-xhipa_3-3) [***e***](#cite_ref-xhipa_3-4) 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=67703&-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-dr3b_4-0) [***b***](#cite_ref-dr3b_4-1) [***c***](#cite_ref-dr3b_4-2) [***d***](#cite_ref-dr3b_4-3) [***e***](#cite_ref-dr3b_4-4) [***f***](#cite_ref-dr3b_4-5) [***g***](#cite_ref-dr3b_4-6) 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%3D6065984179910876032%26-go+%25%23Sesame%23%25%26) at [VizieR](/source/VizieR).

1. ^ [***a***](#cite_ref-xhipb_5-0) [***b***](#cite_ref-xhipb_5-1) 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=67702&-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-skiff2014_6-0) [***b***](#cite_ref-skiff2014_6-1) [***c***](#cite_ref-skiff2014_6-2) Skiff, B. A. (2014), "VizieR Online Data Catalog: Catalogue of Stellar Spectral Classifications (Skiff, 2009- )", *VizieR On-line Data Catalog*, [Bibcode](/source/Bibcode_(identifier)):[2014yCat....1.2023S](https://ui.adsabs.harvard.edu/abs/2014yCat....1.2023S).

1. ^ [***a***](#cite_ref-lindroos1983_7-0) [***b***](#cite_ref-lindroos1983_7-1) [***c***](#cite_ref-lindroos1983_7-2) Gahm, G. F.; Ahlin, P.; Lindroos, K. P. (1983), "A study of visual double stars with early type primaries. I. Spectroscopic results", *Astronomy and Astrophysics Supplement Series*, **51**: 143, [Bibcode](/source/Bibcode_(identifier)):[1983A&AS...51..143G](https://ui.adsabs.harvard.edu/abs/1983A&AS...51..143G).

1. ^ [***a***](#cite_ref-tic_8-0) [***b***](#cite_ref-tic_8-1) Stassun K.G.; et al. (October 2019), "The revised TESS Input Catalog and Candidate Target List", *[The Astronomical Journal](/source/The_Astronomical_Journal)*, **158** (4): 138, [arXiv](/source/ArXiv_(identifier)):[1905.10694](https://arxiv.org/abs/1905.10694), [Bibcode](/source/Bibcode_(identifier)):[2019AJ....158..138S](https://ui.adsabs.harvard.edu/abs/2019AJ....158..138S), [doi](/source/Doi_(identifier)):[10.3847/1538-3881/ab3467](https://doi.org/10.3847%2F1538-3881%2Fab3467), [S2CID](/source/S2CID_(identifier)) [166227927](https://api.semanticscholar.org/CorpusID:166227927).

1. ^ [***a***](#cite_ref-David2015_9-0) [***b***](#cite_ref-David2015_9-1) [***c***](#cite_ref-David2015_9-2) [***d***](#cite_ref-David2015_9-3) David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", *The Astrophysical Journal*, **804** (2): 146, [arXiv](/source/ArXiv_(identifier)):[1501.03154](https://arxiv.org/abs/1501.03154), [Bibcode](/source/Bibcode_(identifier)):[2015ApJ...804..146D](https://ui.adsabs.harvard.edu/abs/2015ApJ...804..146D), [doi](/source/Doi_(identifier)):[10.1088/0004-637X/804/2/146](https://doi.org/10.1088%2F0004-637X%2F804%2F2%2F146), [S2CID](/source/S2CID_(identifier)) [33401607](https://api.semanticscholar.org/CorpusID:33401607).

1. ^ [***a***](#cite_ref-Bochanski2018_10-0) [***b***](#cite_ref-Bochanski2018_10-1) [***c***](#cite_ref-Bochanski2018_10-2) [***d***](#cite_ref-Bochanski2018_10-3) Bochanski, John J.; et al. (April 2018), "Fundamental Properties of Co-moving Stars Observed by Gaia", *The Astronomical Journal*, **155** (4): 17, [arXiv](/source/ArXiv_(identifier)):[1801.00537](https://arxiv.org/abs/1801.00537), [Bibcode](/source/Bibcode_(identifier)):[2018AJ....155..149B](https://ui.adsabs.harvard.edu/abs/2018AJ....155..149B), [doi](/source/Doi_(identifier)):[10.3847/1538-3881/aaaebe](https://doi.org/10.3847%2F1538-3881%2Faaaebe), [S2CID](/source/S2CID_(identifier)) [119256051](https://api.semanticscholar.org/CorpusID:119256051), 149.

1. ^ [***a***](#cite_ref-GaiaDR2b_11-0) [***b***](#cite_ref-GaiaDR2b_11-1) [Brown, A. G. A.](/source/Anthony_Brown_(scientist)); et al. ([Gaia collaboration](/source/Data_Processing_and_Analysis_Consortium)) (August 2018). ["*Gaia* Data Release 2: Summary of the contents and survey properties"](https://doi.org/10.1051%2F0004-6361%2F201833051). *[Astronomy & Astrophysics](/source/Astronomy_%26_Astrophysics)*. **616**. A1. [arXiv](/source/ArXiv_(identifier)):[1804.09365](https://arxiv.org/abs/1804.09365). [Bibcode](/source/Bibcode_(identifier)):[2018A&A...616A...1G](https://ui.adsabs.harvard.edu/abs/2018A&A...616A...1G). [doi](/source/Doi_(identifier)):[10.1051/0004-6361/201833051](https://doi.org/10.1051%2F0004-6361%2F201833051). [Gaia DR2 record for this source](https://vizier.u-strasbg.fr/viz-bin/VizieR-S?Gaia%20DR2%206065984179910876032) at [VizieR](/source/VizieR).

1. **[^](#cite_ref-starhorse_12-0)** Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A.; Matijevic, G.; Monari, G.; Cantat-Gaudin, T. (2019-08-01), "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18", *Astronomy and Astrophysics*, **628**: A94, [arXiv](/source/ArXiv_(identifier)):[1904.11302](https://arxiv.org/abs/1904.11302), [Bibcode](/source/Bibcode_(identifier)):[2019A&A...628A..94A](https://ui.adsabs.harvard.edu/abs/2019A&A...628A..94A), [doi](/source/Doi_(identifier)):[10.1051/0004-6361/201935765](https://doi.org/10.1051%2F0004-6361%2F201935765), [ISSN](/source/ISSN_(identifier)) [0004-6361](https://search.worldcat.org/issn/0004-6361), [S2CID](/source/S2CID_(identifier)) [131780028](https://api.semanticscholar.org/CorpusID:131780028).

1. ^ [***a***](#cite_ref-SIMBAD_A_13-0) [***b***](#cite_ref-SIMBAD_A_13-1) ["N Cen"](http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=N+Cen). *[SIMBAD](/source/SIMBAD)*. [Centre de données astronomiques de Strasbourg](/source/Centre_de_donn%C3%A9es_astronomiques_de_Strasbourg). Retrieved 2020-03-03.

1. **[^](#cite_ref-SIMBAD_B_14-0)** ["HD 120641"](http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+120641). *[SIMBAD](/source/SIMBAD)*. [Centre de données astronomiques de Strasbourg](/source/Centre_de_donn%C3%A9es_astronomiques_de_Strasbourg). Retrieved 2020-03-03.

1. ^ [***a***](#cite_ref-Eggleton2008_15-0) [***b***](#cite_ref-Eggleton2008_15-1) [***c***](#cite_ref-Eggleton2008_15-2) Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", *Monthly Notices of the Royal Astronomical Society*, **389** (2): 869–879, [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. **[^](#cite_ref-Rizzuto2011_16-0)** Rizzuto, Aaron; et al. (October 2011), "Multidimensional Bayesian membership analysis of the Sco OB2 moving group", *Monthly Notices of the Royal Astronomical Society*, **416** (4): 3108–3117, [arXiv](/source/ArXiv_(identifier)):[1106.2857](https://arxiv.org/abs/1106.2857), [Bibcode](/source/Bibcode_(identifier)):[2011MNRAS.416.3108R](https://ui.adsabs.harvard.edu/abs/2011MNRAS.416.3108R), [doi](/source/Doi_(identifier)):[10.1111/j.1365-2966.2011.19256.x](https://doi.org/10.1111%2Fj.1365-2966.2011.19256.x), [S2CID](/source/S2CID_(identifier)) [54510608](https://api.semanticscholar.org/CorpusID:54510608).

1. **[^](#cite_ref-WDSC2014_17-0)** Mason, B. D.; et al. (2014), ["The Washington Visual Double Star Catalog"](https://vizier.u-strasbg.fr/viz-bin/VizieR?-source=B/wds), *The Astronomical Journal*, **122** (6): 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), retrieved 2015-07-22

1. **[^](#cite_ref-lindroos1985_18-0)** Lindroos, K. P. (1985), "A study of visual double stars with early type primaries. IV Astrophysical data", *Astronomy and Astrophysics Supplement Series*, **60**: 183, [Bibcode](/source/Bibcode_(identifier)):[1985A&AS...60..183L](https://ui.adsabs.harvard.edu/abs/1985A&AS...60..183L).

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 [N Centauri](https://en.wikipedia.org/wiki/N_Centauri) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/N_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.