Categories
X1 Centauri
Topic: Astronomy
From HandWiki - Reading time: 3 min
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 12h 23m 35.42002s[1] |
| Declination | −35° 24′ 45.6383″[1] |
| Apparent magnitude (V) | 5.312[2] |
| Characteristics | |
| Spectral type | B8/9V[2] |
| B−V color index | -0.08[3] |
| Astrometry | |
| Radial velocity (Rv) | -10.00[4] km/s |
| Proper motion (μ) | RA: -41.17[1] mas/yr Dec.: -7.44[1] mas/yr |
| Parallax (π) | 7.34 ± 0.26[1] mas |
| Distance | 440 ± 20 ly (136 ± 5 pc) |
| Absolute magnitude (MV) | -0.2[5] |
| Details | |
| Mass | 3[6] M☉ |
| Radius | 3.6[7] R☉ |
| Luminosity | 265[8] L☉ |
| Temperature | 11300[6] K |
| Age | 0.151[6] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
x1 Centauri is a star located in the constellation Centaurus. It is also known by its designations HD 107832 and HR 4712. The apparent magnitude of the star is about 5.3, meaning it is only visible to the naked eye under excellent viewing conditions. Its distance is about 440 light-years (140 parsecs), based on its parallax measured by the Hipparcos astrometry satellite.[1]
x1 Centauri's spectral type is B8/9V, meaning it is a late B-type main sequence star. These types of stars are a few times more massive than the Sun, and have effective temperatures of about 10,000 to 30,000 K. x1 Centauri is just over 3 times more massive than the Sun[6] and has a temperature of about 11,300 K.[6] The star x2 Centauri, which lies about 0.4′ away from x1 Centauri, may or may not form a physical binary star system with x1 Centauri, as the two have similar proper motions and distances.[2][9]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V. http://www.aanda.org/index.php?option=com_article&access=bibcode&Itemid=129&bibcode=2007A%2526A...474..653VFUL.
- ↑ 2.0 2.1 2.2 2.3 "* x1 Cen". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=%2A+x1+Cen.
- ↑ Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966). "Ubvrijkl Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory 4: 99–110. Bibcode: 1966CoLPL...4...99J.
- ↑ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. doi:10.1134/S1063773706110065. Bibcode: 2006AstL...32..759G. http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2006AstL...32..759G.
- ↑ Jaschek, C.; Gomez, A. E. (1998). "The absolute magnitude of the early type MK standards from HIPPARCOS parallaxes". Astronomy and Astrophysics 330 (619–625): 619. Bibcode: 1998A&A...330..619J.
- ↑ 6.0 6.1 6.2 6.3 6.4 Grosbol, P. J. (1978). "Space velocities and ages of nearby early-type stars". Astronomy and Astrophysics Supplement Series 32: 409–421. Bibcode: 1978A&AS...32..409G.
- ↑ Pasinetti Fracassini, L. E. et al. (2001). "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics". Astronomy & Astrophysics 367 (2): 521–24. doi:10.1051/0004-6361:20000451. Bibcode: 2001A&A...367..521P.
- ↑ 8.0 8.1 de Vaucouleurs, A. (1957). "Spectral types and luminosities of B, A and F southern stars". Monthly Notices of the Royal Astronomical Society 117 (4): 449. doi:10.1093/mnras/117.4.449. Bibcode: 1957MNRAS.117..449D.
- ↑ "* x2 Cen". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=%2A+x2+Cen.
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