Rho Centauri
Appearance
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 mas[1] |
Distance | 380 ± 30 ly (120 ± 10 pc) |
Absolute magnitude (MV) | −0.6[3] |
Details | |
Mass | 6.6 ± 0.1[5] M☉ |
Radius | 3.8[6] R☉ |
Luminosity | 500[3] L☉ |
Surface gravity (log g) | 4.22[3] cgs |
Temperature | 16,200[3] K |
Rotational velocity (v sin i) | 147[7] km/s |
Age | 23.7 ± 1.4[5] Myr |
Other designations | |
Database references | |
SIMBAD | data |
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
- ^ a b c d e 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
- ^ a b c 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.
- ^ a b c d e f 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
- ^ 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.
- ^ a b 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
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: CS1 maint: unflagged free DOI (link) - ^ 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.
- ^ 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.
- ^ "rho Cen -- Star", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2016-12-25.