x1 Centauri

{{Short description|Star in the constellation Centaurus}}

{{DISPLAYTITLE:x¹ Centauri}}

{{for|other stars with this Bayer designation|x Centauri}}

{{Starbox begin

|name=x¹ Centauri}}

{{Starbox observe

|constell=Centaurus{{cite constellation|HR 4712}}

|epoch=J2000

| ra = {{RA|12|23|35.42002}}{{cite journal | title=Validation of the new Hipparcos reduction | last1=van Leeuwen | first1=F. | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | date=2007 | arxiv=0708.1752 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 |s2cid = 18759600}}

| dec = {{DEC|-35|24|45.6383}}

|appmag_v=5.312{{cite simbad|title=* x1 Cen|access-date=15 January 2016}} }}

{{Starbox character

|class=B8/9V

|b-v=-0.08{{cite journal|author1=Johnson, H. L.|author2=Mitchell, R. I.|author3=Iriarte, B.|author4=Wisniewski, W. Z.|title=Ubvrijkl Photometry of the Bright Stars|journal=Communications of the Lunar and Planetary Laboratory|volume=4|pages=99–110|date=1966|bibcode=1966CoLPL...4...99J}}

}}

{{Starbox astrometry

|radial_v=−10.00{{cite journal|title=Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system|author=Gontcharov, G. A.|date=2006|journal=Astronomy Letters|volume=32|issue=11|pages=759–771|bibcode=2006AstL...32..759G|doi=10.1134/S1063773706110065|arxiv=1606.08053|s2cid=119231169}}

|prop_mo_ra=−41.17

|prop_mo_dec=−7.44

|parallax=7.34

|p_error=0.26

|parallax_footnote=

|absmag_v=−0.2{{cite journal|title=The absolute magnitude of the early type MK standards from HIPPARCOS parallaxes|date=1998|journal=Astronomy and Astrophysics|volume=330|issue=619–625|author1=Jaschek, C.|author2=Gomez, A. E.|page=619|bibcode=1998A&A...330..619J}}

}}

{{Starbox detail

|radius=3.6{{cite journal|display-authors=1|author1=Pasinetti Fracassini, L. E.|author2=Pastori, L.|author3=Covino, S.|author4=Pozzi, A.|title=Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics|journal=Astronomy & Astrophysics|volume=367|pages=521–24|date=2001|issue=2|bibcode=2001A&A...367..521P|doi=10.1051/0004-6361:20000451|arxiv=astro-ph/0012289|s2cid=425754}}

|mass=3{{cite journal|title=Space velocities and ages of nearby early-type stars|author=Grosbol, P. J.|date=1978|journal=Astronomy and Astrophysics Supplement Series|volume=32|pages=409–421|bibcode=1978A&AS...32..409G}}

|luminosity=265{{cite journal|title=Spectral types and luminosities of B, A and F southern stars|author=de Vaucouleurs, A.|journal=Monthly Notices of the Royal Astronomical Society|volume=117|page=449|date=1957|issue=4|bibcode=1957MNRAS.117..449D|doi=10.1093/mnras/117.4.449|doi-access=free}}

|temperature=11300

|age_gyr=0.151

}}

{{Starbox catalog

|names=x¹ Cen, 113 G. Cen, CD−34°8117, HD 107832, HIP 60449, SAO 203420, HR 4712, GC 16892}}

{{Starbox reference

|Simbad=HD+107832}}

{{Starbox end}}

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.

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 and has a temperature of about 11,300 K. The star x² Centauri, which lies about 0.4{{prime}} 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.{{cite simbad|title=* x2 Cen|access-date=16 January 2017}}