Rho Centauri
| |
| 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) | +3.96[2] |
| Characteristics | |
| Spectral type | B3 V[2] |
| U−B color index | −0.62 |
| B−V color index | −0.15 |
| Astrometry | |
| Radial velocity (Rv) | +15 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 |
| Distance | 380 ± 30 ly (120 ± 10 pc) |
| Absolute magnitude (MV) | −0.6[2] |
| Details | |
| Mass | 6.6 ± 0.1[3] M☉ |
| Luminosity | 500[2] L☉ |
| Surface gravity (log g) | 4.22[2] cgs |
| Temperature | 16,200[2] K |
| Age | 23.7 ± 1.4[3] 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 +3.98. 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.[2]
References
- 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 - 1 2 3 4 5 6 7 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
- 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
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