# G Centauri

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Star in the constellation Centaurus

This article is about G Centauri. For g Centauri, see [2 Centauri](/source/2_Centauri).

G Centauri Location of G Centauri (circled in red) Observation data Epoch J2000 Equinox J2000 Constellation Centaurus[1] Right ascension 12h 26m 31.75955s[2] Declination −51° 27′ 02.2899″[2] Apparent magnitude (V) 4.82[1] Characteristics Spectral type B3V(n)[3] B−V color index −0.141±0.002[1] Astrometry Radial velocity (Rv) +5.0±4.2[1] km/s Proper motion (μ) RA: −30.66[2] mas/yr Dec.: −10.13[2] mas/yr Parallax (π) 7.28±0.24 mas[2] Distance 450 ± 10 ly (137 ± 5 pc) Absolute magnitude (MV) −0.87[1] Details Mass 6.2±0.1[4] M☉ Radius 3.42[5] R☉ Luminosity 483.06[1] L☉ Temperature 13,732[6] K Metallicity [Fe/H] −0.38±0.06[7] dex Rotational velocity (v sin i) 298±12[8] km/s Age 15.8±0.2[4] Myr Other designations G Cen, CD−50°6975, GC 16954, HD 108257, HIP 60710, HR 4732, SAO 239948, CCDM J12265-5127[9] Database references SIMBAD data

**G Centauri** is a single[10] [star](/source/Star) in the southern [constellation](/source/Constellation) of [Centaurus](/source/Centaurus). It is visible to the naked eye as a faint, blue-white hued star with an [apparent visual magnitude](/source/Apparent_visual_magnitude) of +4.82. This object is located approximately 450 [light years](/source/Light_year) from the Sun, based on [parallax](/source/Stellar_parallax).[2] It is a member of the Lower Centaurus–Crux group of the [Scorpius–Centaurus association](/source/Scorpius%E2%80%93Centaurus_association), with the former having an age of about 17 million years.[11]

This object is a [B-type main-sequence star](/source/B-type_main-sequence_star) with a [stellar classification](/source/Stellar_classification) of B3V(n),[3] where the 'n' indicates "nebulous" (broad) [lines](/source/Absorption_line) due to rapid rotation. It is around 16[4] million years old with a [projected rotational velocity](/source/Projected_rotational_velocity) of up to 298 km/s.[8] The star has six[4] times the [mass of the Sun](/source/Mass_of_the_Sun) and 3.4[5] times the [Sun's radius](/source/Sun's_radius). It is radiating 483[1] times the [luminosity of the Sun](/source/Luminosity_of_the_Sun) from its [photosphere](/source/Photosphere) at an [effective temperature](/source/Effective_temperature) of 13,732 K.[6] An [infrared excess](/source/Infrared_excess) indicates a [circumstellar disk](/source/Circumstellar_disk) of dust with a mean temperature of 50 K is orbiting the star at a separation of 717.8 [AU](/source/Astronomical_unit).[5]

## 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) 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=60710&-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-vanLeeuwen2007_2-0) [***b***](#cite_ref-vanLeeuwen2007_2-1) [***c***](#cite_ref-vanLeeuwen2007_2-2) [***d***](#cite_ref-vanLeeuwen2007_2-3) [***e***](#cite_ref-vanLeeuwen2007_2-4) [***f***](#cite_ref-vanLeeuwen2007_2-5) van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", *Astronomy and Astrophysics*, **474** (2): 653–664, [arXiv](/source/ArXiv_(identifier)):[0708.1752](https://arxiv.org/abs/0708.1752), [Bibcode](/source/Bibcode_(identifier)):[2007A&A...474..653V](https://ui.adsabs.harvard.edu/abs/2007A&A...474..653V), [doi](/source/Doi_(identifier)):[10.1051/0004-6361:20078357](https://doi.org/10.1051%2F0004-6361%3A20078357), [S2CID](/source/S2CID_(identifier)) [18759600](https://api.semanticscholar.org/CorpusID:18759600).

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-Tetzlaff2011_4-0) [***b***](#cite_ref-Tetzlaff2011_4-1) [***c***](#cite_ref-Tetzlaff2011_4-2) [***d***](#cite_ref-Tetzlaff2011_4-3) Tetzlaff, N.; et al. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun", *Monthly Notices of the Royal Astronomical Society*, **410** (1): 190–200, [arXiv](/source/ArXiv_(identifier)):[1007.4883](https://arxiv.org/abs/1007.4883), [Bibcode](/source/Bibcode_(identifier)):[2011MNRAS.410..190T](https://ui.adsabs.harvard.edu/abs/2011MNRAS.410..190T), [doi](/source/Doi_(identifier)):[10.1111/j.1365-2966.2010.17434.x](https://doi.org/10.1111%2Fj.1365-2966.2010.17434.x), [S2CID](/source/S2CID_(identifier)) [118629873](https://api.semanticscholar.org/CorpusID:118629873).

1. ^ [***a***](#cite_ref-Cotten2016_5-0) [***b***](#cite_ref-Cotten2016_5-1) [***c***](#cite_ref-Cotten2016_5-2) Cotten, Tara H.; Song, Inseok (July 2016), "A Comprehensive Census of Nearby Infrared Excess Stars", *The Astrophysical Journal Supplement Series*, **225** (1): 24, [arXiv](/source/ArXiv_(identifier)):[1606.01134](https://arxiv.org/abs/1606.01134), [Bibcode](/source/Bibcode_(identifier)):[2016ApJS..225...15C](https://ui.adsabs.harvard.edu/abs/2016ApJS..225...15C), [doi](/source/Doi_(identifier)):[10.3847/0067-0049/225/1/15](https://doi.org/10.3847%2F0067-0049%2F225%2F1%2F15), [S2CID](/source/S2CID_(identifier)) [118438871](https://api.semanticscholar.org/CorpusID:118438871), 15.

1. ^ [***a***](#cite_ref-McDonald2012_6-0) [***b***](#cite_ref-McDonald2012_6-1) McDonald, I.; et al. (2012), "Fundamental parameters and infrared excesses of Hipparcos stars", *Monthly Notices of the Royal Astronomical Society*, **427** (1): 343–357, [arXiv](/source/ArXiv_(identifier)):[1208.2037](https://arxiv.org/abs/1208.2037), [Bibcode](/source/Bibcode_(identifier)):[2012MNRAS.427..343M](https://ui.adsabs.harvard.edu/abs/2012MNRAS.427..343M), [doi](/source/Doi_(identifier)):[10.1111/j.1365-2966.2012.21873.x](https://doi.org/10.1111%2Fj.1365-2966.2012.21873.x), [S2CID](/source/S2CID_(identifier)) [118665352](https://api.semanticscholar.org/CorpusID:118665352).

1. **[^](#cite_ref-gaspar2016_7-0)** Gáspár, András; et al. (2016), "The Correlation between Metallicity and Debris Disk Mass", *The Astrophysical Journal*, **826** (2): 171, [arXiv](/source/ArXiv_(identifier)):[1604.07403](https://arxiv.org/abs/1604.07403), [Bibcode](/source/Bibcode_(identifier)):[2016ApJ...826..171G](https://ui.adsabs.harvard.edu/abs/2016ApJ...826..171G), [doi](/source/Doi_(identifier)):[10.3847/0004-637X/826/2/171](https://doi.org/10.3847%2F0004-637X%2F826%2F2%2F171), [S2CID](/source/S2CID_(identifier)) [119241004](https://api.semanticscholar.org/CorpusID:119241004).

1. ^ [***a***](#cite_ref-brown1997_8-0) [***b***](#cite_ref-brown1997_8-1) Brown, A. G. A.; Verschueren, W. (1997), "High S/N Echelle spectroscopy in young stellar groups. II. Rotational velocities of early-type stars in SCO OB2", *Astronomy and Astrophysics*, **319**: 811, [arXiv](/source/ArXiv_(identifier)):[astro-ph/9608089](https://arxiv.org/abs/astro-ph/9608089), [Bibcode](/source/Bibcode_(identifier)):[1997A&A...319..811B](https://ui.adsabs.harvard.edu/abs/1997A&A...319..811B). Note: "The He i λ4026 line in this star is broader than the models. The value of vsini may thus be overestimated."

1. **[^](#cite_ref-SIMBAD_9-0)** ["G Cen"](http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=G+Cen). *[SIMBAD](/source/SIMBAD)*. [Centre de données astronomiques de Strasbourg](/source/Centre_de_donn%C3%A9es_astronomiques_de_Strasbourg). Retrieved 2019-08-15.

1. **[^](#cite_ref-Eggleton2008_10-0)** Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", *[Monthly Notices of the Royal Astronomical Society](/source/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-Condell2015_11-0)** Jang-Condell, Hannah; et al. (August 2015), "Spitzer IRS Spectra of Debris Disks in the Scorpius–Centaurus OB Association", *The Astrophysical Journal*, **808** (2): 19, [arXiv](/source/ArXiv_(identifier)):[1506.05428](https://arxiv.org/abs/1506.05428), [Bibcode](/source/Bibcode_(identifier)):[2015ApJ...808..167J](https://ui.adsabs.harvard.edu/abs/2015ApJ...808..167J), [doi](/source/Doi_(identifier)):[10.1088/0004-637X/808/2/167](https://doi.org/10.1088%2F0004-637X%2F808%2F2%2F167), [S2CID](/source/S2CID_(identifier)) [118549483](https://api.semanticscholar.org/CorpusID:118549483), 167.

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 [G Centauri](https://en.wikipedia.org/wiki/G_Centauri) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/G_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.