HD 125288

HD 125288 is a single[9] star in the southern constellation of Centaurus. It has the Bayer designation v Centauri (lower case V); while HD 125288 is the star's identifier in the Henry Draper catalogue. The object has a blue-white hue and is faintly visible to the naked eye with an apparent visual magnitude of 4.30.[2] Based on parallax measurements, it is located at a distance of approximately 1,230 light years from the Sun.[1] This is a candidate runaway star that is moving to the west and falling back into the Galactic plane.[5] It has an absolute magnitude of −3.56.[2]

This article is about v Centauri. Not to be confused with ν (nu) Centauri. For the variable star, see V Centauri.
HD 125288
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Centaurus
Right ascension 14h 20m 19.54262s[1]
Declination −56° 23′ 11.3900″[1]
Apparent magnitude (V) 4.30[2]
Characteristics
Evolutionary stage Supergiant[3]
Spectral type B5Ib/II[4] or B6Ib[5]
B−V color index 0.082±0.003[2]
Astrometry
Radial velocity (Rv)4.2±2.7[2] km/s
Proper motion (μ) RA: −9.64[1] mas/yr
Dec.: −7.46[1] mas/yr
Parallax (π)2.66 ± 0.20 mas[1]
Distance1,230 ± 90 ly
(380 ± 30 pc)
Absolute magnitude (MV)−3.56[2]
Details
Mass7.9±0.4[6] M☉
Radius18.87+1.35
−1.50[7] R☉
Luminosity806.3±142.9[7] L☉
Surface gravity (log g)2.55[3] cgs
Temperature7,081+299
−242[7] K
Rotational velocity (v sin i)23[3] km/s
Age37.3±4.2[6] Myr
Other designations
v Cen, CPD−55°5984, FK5 529, GC 19318, HD 125288, HIP 70069, HR 5358, SAO 241641[8]
Database references
SIMBADdata

This massive B-type supergiant star[3] has a stellar classification of B5Ib/II[4] or B6Ib.[5] It is around 37 million years old and has 8 times the mass of the Sun.[6] The star has expanded to 19[7] times the girth of the Sun and is spinning with a projected rotational velocity of 23 km/s.[3] It is radiating 806 times the luminosity of the Sun from its photosphere at an effective temperature of 7,081 K.[7]

In 2016, an asterism including HD 125288 (SAO 241641) was unofficially identified in honor of David Bowie.[10][11]

References
  1. van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600. Vizier catalog entry
  2. Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644.
  3. Fraser, M.; et al. (2010). "Atmospheric parameters and rotational velocities for a sample of Galactic B-type supergiants". Monthly Notices of the Royal Astronomical Society. 404 (3): 1306. arXiv:1001.3337. Bibcode:2010MNRAS.404.1306F. doi:10.1111/j.1365-2966.2010.16392.x. S2CID 118674151.
  4. Houk, Nancy; Cowley, A. P. (1979). Michigan catalogue of two-dimensional spectral types for the HD stars. Vol. 1. Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan. Bibcode:1978mcts.book.....H.
  5. Maíz Apellániz, J.; et al. (August 2018). "Search for Galactic runaway stars using Gaia Data Release 1 and HIPPARCOS proper motions". Astronomy & Astrophysics. 616: 20. arXiv:1804.06915. Bibcode:2018A&A...616A.149M. doi:10.1051/0004-6361/201832787. S2CID 55004808. A149.
  6. 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:1007.4883. Bibcode:2011MNRAS.410..190T. doi:10.1111/j.1365-2966.2010.17434.x. S2CID 118629873.
  7. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  8. "HD 125288". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-02-03.
  9. 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:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. S2CID 14878976.
  10. "David Bowie Honored With Lightning Bolt-Shaped Constellation". The Huffington Post. 18 January 2016. Retrieved 2016-01-18.
  11. "Constellation Bowie? I don't think so". Guy's weblog. 2016-01-18. Retrieved 2016-01-18.
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