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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).

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 mas[1]
Absolute magnitude (MV)0.29[5]
Orbit[6]
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°
Details
Temperature5,090[5] K
Rotational velocity (v sin i)11.4±0.6[5] km/s
Other designations
CD−47 324, HD 6595, HIP 5165, HR 322, SAO 215365.[7]
Database references
SIMBADdata

The distance to Beta Phoenicis is poorly known. The original reduction of the Hipparcos satellite's data yielded a parallax value of 16 milliarcseconds, yet its standard error was larger than the parallax value itself.[8] 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).[9]

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.[6]


References


  1. 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, S2CID 18759600.
  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.
  3. "Sixth Catalog of Orbits of Visual Binary Stars". United States Naval Observatory.
  4. 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, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
  5. Ammler-von Eiff, Matthias; Reiners, Ansgar (June 2012), "New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?", Astronomy & Astrophysics, 542: A116, arXiv:1204.2459, Bibcode:2012A&A...542A.116A, doi:10.1051/0004-6361/201118724, S2CID 53666672.
  6. Argyle, R. W.; et al. (May 2015). "Micrometric measures and orbits of southern visual double stars". Astronomische Nachrichten. 336 (4): 378–387. Bibcode:2015AN....336..378A. doi:10.1002/asna.201412166.
  7. "* bet Phe". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2016-09-02.
  8. Perryman, M. A. C.; et al. (April 1997). "The HIPPARCOS Catalogue". Astronomy & Astrophysics. 323: L49–L52. Bibcode:1997A&A...323L..49P.
  9. 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:1995gcts.book.....V.

На других языках

[de] Beta Phoenicis

β Phoenicis ist ein Doppelstern im Sternbild Phönix. Beide Sterne im System sind Gelbe Riesen der Spektralklasse G8 III und haben beinahe denselben Entwicklungsstand und dieselben Eigenschaften. Die beiden Sterne umkreisen einander auf einer sehr elliptischen Bahn mit einer Periode von 168 Jahren. Das Spezielle am System ist, dass die Entfernung trotz der großen Helligkeit bisher nicht über die Methode der Parallaxe bestimmt werden konnte. Die Daten des Hipparcos-Satelliten ergeben für die Parallaxe einen extrem großen Fehlerbereich. Aufgrund der Spektralklasse der beiden Sterne ist dennoch eine sehr grobe Entfernungsbestimmung auf etwa 200 Lichtjahre möglich.[3]
- [en] Beta Phoenicis

[ru] Бета Феникса

Бета Феникса (β Phoenicis, β Phe) — двойная звезда в созвездии Феникса. Видимая звёздная величина составляет 3,30,[8] звезда доступна для наблюдения невооружённым глазом.


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