Beta Phoenicis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Phoenix |
| Right ascension | 01h 06m 05.03952s[1] |
| Declination | −46° 43′ 06.2785″[1] |
| Apparent magnitude (V) | 3.30[2] (4.10 / 4.19)[3] |
| Characteristics | |
| Spectral type | G8III + G8III:[4] |
| Astrometry | |
| Proper motion (μ) | RA: −80.81[1] mas/yr Dec.: +34.97[1] mas/yr |
| Parallax (π) | 0.12 ± 14.62[1] mas |
| Orbit[3] | |
| Period (P) | 170.7 ± 5.0 yr |
| Semi-major axis (a) | 0.946 ± 0.016″ |
| Eccentricity (e) | 0.718 ± 0.016 |
| Inclination (i) | 144.0 ± 1.5° |
| Longitude of the node (Ω) | 126.4 ± 3.5° |
| Periastron epoch (T) | 2003.41 ± 0.10 |
| Argument of periastron (ω) (secondary) | 293.5 ± 4.4° |
| Other designations | |
| Database references | |
| SIMBAD | data |
Beta Phoenicis (β Phoenicis, β Phe) is a binary star in the constellation Phoenix. Its apparent magnitude is 3.30,[2] meaning that it can be seen with the naked eye (see Bortle scale).
The distance to Beta Phoenicis is poorly known. The original reduction of the Hipparcos satellite's data yielded a parallax value of 16 miliarcseconds, yet its standard error was larger than the parallax value itself.[6] The new reduction of the Hipparcos data gave 0.12 ± 14.62 milliarcseconds, still unusable.[1] The General Catalogue of Trigonometric Parallaxes, an older catalogue of ground-based parallaxes, lists the parallax as 20 ± 16 milliarcseconds, corresponding to about 200 light-years (61 pc).[7]
Beta Phoenicis is a relatively wide visual binary consisting of two G-type giant stars, both with spectral types of G8III.[4] The two orbit each other every 170.7 years and have a relatively eccentric orbit. The stars are separated by almost one arcsecond.[3]
References
- 1 2 3 4 5 6 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, Bibcode:2007A&A...474..653V, arXiv:0708.1752
, doi:10.1051/0004-6361:20078357. - 1 2 Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D.
- 1 2 3 "Sixth Catalog of Orbits of Visual Binary Stars". United States Naval Observatory.
- 1 2 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, Bibcode:2008MNRAS.389..869E, arXiv:0806.2878 , doi:10.1111/j.1365-2966.2008.13596.x.
- ↑ "* bet Phe". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2016-09-02.
- ↑ Perryman, M. A. C.; et al. (April 1997). "The HIPPARCOS Catalogue". Astronomy & Astrophysics. 323: L49–L52. Bibcode:1997A&A...323L..49P.
- ↑ van Altena, W. F.; Lee, J. T.; Hoffleit, E. D. (1995). The General Catalogue of Trigonometric [Stellar] Parallaxes (4th ed.). New Haven, CT: Yale University Observatory. Bibcode:1995GCTP..C......0V.