Rho Centauri

Rho Centauri
Diagram showing star positions and boundaries of the Centaurusconstellation and its surroundings
Location of ρ Centauri (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Centaurus
Right ascension 12h 11m 39.11770s[1]
Declination −52° 22′ 06.4432″[1]
Apparent magnitude (V) +3.94[2]
Characteristics
Spectral type B3 V[3]
U−B color index −0.650[2]
B−V color index −0.167[2]
Astrometry
Radial velocity (Rv)+15[4] km/s
Proper motion (μ) RA: −34.92[1] mas/yr
Dec.: −16.81[1] mas/yr
Parallax (π)8.61 ± 0.76[1] mas
Distance380 ± 30 ly
(120 ± 10 pc)
Absolute magnitude (MV)−0.6[3]
Details
Mass6.6 ± 0.1[5] M☉
Radius3.8[6] R☉
Luminosity500[3] L☉
Surface gravity (log g)4.22[3] cgs
Temperature16,200[3] K
Rotational velocity (v sin i)147[7] km/s
Age23.7 ± 1.4[5] Myr
Other designations
CD−51°6455, HD 105937, HIP 59449, HR 4638, SAO 239737.[8]
Database references
SIMBADdata

Rho Centauri (ρ Cen, ρ Centauri) is a star in the southern constellation of Centaurus. ρ Centauri is a blue-white B-type main sequence dwarf with an apparent magnitude of +3.94. It is approximately 380 light years from Earth.

This star is a proper motion member of the Lower-Centaurus Crux sub-group in the Scorpius-Centaurus OB association, the nearest such association of co-moving massive stars to the Sun.[3]

References

  1. 1 2 3 4 5 van Leeuwen, F. (November 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
  2. 1 2 3 Gutierrez-Moreno, Adelina; Moreno, Hugo (June 1968), "A photometric investigation of the Scorpio-Centaurus association", Astrophysical Journal Supplement, 15: 459, Bibcode:1968ApJS...15..459G, doi:10.1086/190168.
  3. 1 2 3 4 5 6 de Geus, E. J.; de Zeeuw, P. T.; Lub, J. (June 1989), "Physical parameters of stars in the Scorpio-Centaurus OB association", Astronomy and Astrophysics, 216 (1–2): 44–61, Bibcode:1989A&A...216...44D
  4. ↑ Evans, D. S. (1967), "The Revision of the General Catalogue of Radial Velocities", Determination of Radial Velocities and their Applications, 30: 57, Bibcode:1967IAUS...30...57E.
  5. 1 2 Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (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
  6. ↑ Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics", Astronomy and Astrophysics, 367: 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451.
  7. ↑ Uesugi, Akira; Fukuda, Ichiro (1970), "Catalogue of rotational velocities of the stars", Contributions from the Institute of Astrophysics and Kwasan Observatory, University of Kyoto, Bibcode:1970crvs.book.....U.
  8. ↑ "rho Cen -- Star", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2016-12-25.
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