Phi Centauri
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 13h 58m 16.27s[1] |
| Declination | −42° 06′ 02.7″[1] |
| Apparent magnitude (V) | +3.83 |
| Characteristics | |
| Spectral type | B2 IV[2] |
| U−B color index | −0.83 |
| B−V color index | −0.21 |
| Variable type | none |
| Astrometry | |
| Radial velocity (Rv) | +6 km/s |
| Proper motion (μ) | RA: -22.77 ± 0.15[1] mas/yr Dec.: -20.13 ± 0.12[1] mas/yr |
| Parallax (π) | 6.21 ± 0.17[1] mas |
| Distance | 530 ± 10 ly (161 ± 4 pc) |
| Absolute magnitude (MV) | −1.93 |
| Details | |
| Mass | 8.5 ± 0.3[2] M☉ |
| Radius | 4.19 ± 0.35[3] R☉ |
| Luminosity | 4,000[4] L☉ |
| Surface gravity (log g) | 4.08 ± 0.07[3] cgs |
| Temperature | 21,638 ± 388[3] K |
| Age | 18.0 ± 3.2[2] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Phi Centauri (φ Cen, φ Centauri) is a star in the constellation Centaurus. φ Centauri is a blue-white B-type subgiant with an apparent magnitude of +3.83. It is approximately 530 light years from Earth.
This star is a proper motion member of the Upper-Centaurus Lupus sub-group in the Scorpius-Centaurus OB association, the nearest such co-moving association of massive stars to the Sun.[4]
References
- 1 2 3 4 5 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. Vizier catalog entry
- 1 2 3 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
- 1 2 3 Fitzpatrick, E. L.; Massa, D. (March 2005), "Determining the Physical Properties of the B Stars. II. Calibration of Synthetic Photometry", The Astronomical Journal 129 (3): 1642–1662, arXiv:astro-ph/0412542, Bibcode:2005AJ....129.1642F, doi:10.1086/427855
- 1 2 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
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