X1 Centauri

For other stars with this Bayer designation, see x Centauri.

x¹ Centauri

Observation data Epoch J2000        Equinox J2000
Constellation	Centaurus [1]
Right ascension	12h 23m 35.420s [2]
Declination	−35° 24′ 45.64″ [2]
Apparent magnitude  (V)	5.32 [1]
Characteristics
Spectral type	B8/9V [3]
B−V color index	−0.08 [4]
Astrometry
Radial velocity (Rv)	−10.00 [5] km/s
Proper motion (μ)	RA: −42.132 mas/yr [2] Dec.: −6.896 mas/yr [2]
Parallax (π)	7.3671±0.0953  mas [2]
Distance	443 ± 6  ly (136 ± 2  pc)
Absolute magnitude  (MV)	−0.2 [6]
Details
Mass	3 [7]   M☉
Radius	3.6 [8]   R☉
Luminosity	265 [9]   L☉
Temperature	11,300 [7]   K
Age	0.151 [7]   Gyr
Other designations
x1 Cen, CD−34°8117, GC 16892, HD 107832, HIP 60449, HR 4712, SAO 203420, G 113 G. Cen [9] [10]
Database references
SIMBAD	data

x¹ Centauri is a star located in the constellation Centaurus. Its name is a Bayer designation; it is also known by its designations HD 107832 and HR 4712. The apparent magnitude of the star is about 5.32, ^[1] meaning it is only visible to the naked eye under excellent viewing conditions. Its distance is about 443 light-years (136  pc ) from Earth based on parallax measurements. ^[2]

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 ^[7] and has a temperature of about 11,300 K. ^[7] 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. ^{[10] [11]}

References

1. Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters . 38 (5): 331. arXiv: 1108.4971 . Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. XHIP record for this object at VizieR .
2. Vallenari, A.; et al. (Gaia collaboration) (2023), "Gaia Data Release 3. Summary of the content and survey properties", Astronomy and Astrophysics, 674: A1, arXiv: 2208.00211 , Bibcode:2023A&A...674A...1G, doi: 10.1051/0004-6361/202243940 , S2CID   244398875. Gaia DR3 record for this source at VizieR .
3. Houk, Nancy (1979). Michigan catalogue of two-dimensional spectral types for the HD stars. Vol. 3. Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan. Bibcode:1982mcts.book.....H.
4. Johnson, H. L.; et al. (1966). "Ubvrijkl Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99–110. Bibcode:1966CoLPL...4...99J.
5. Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv: 1606.08053 . Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID   119231169.
6. 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.
7. 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.
8. Pasinetti Fracassini, L. E.; et al. (2001). "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Comments and statistics". Astronomy & Astrophysics. 367 (2) (Third ed.): 521–24. arXiv: astro-ph/0012289 . Bibcode:2001A&A...367..521P. doi:10.1051/0004-6361:20000451. S2CID   425754.
9. 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. Bibcode:1957MNRAS.117..449D. doi: 10.1093/mnras/117.4.449 .
10. "* x1 Cen". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 15 January 2016.
11. "* x2 Cen". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 16 January 2017.