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A Centauri








A Centauri


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This article is about "A Centauri". For "a Centauri", see V761 Centauri. For "α Centauri", see Alpha Centauri.































































































A Centauri


Diagram showing star positions and boundaries of the Centaurus constellation and its surroundings
Cercle rouge 100%.svg

Location of A Centauri (circled)
Observation data
Epoch J2000.0      Equinox J2000.0

Constellation
Centaurus

Right ascension
 11h 34m 45.66s[1]

Declination
 −54° 15′ 50.7″[1]

Apparent magnitude (V)
 +4.62
Characteristics

Spectral type
 B9Ve
U−B color index
 −0.21
B−V color index
 −0.08

Variable type
 none
Astrometry
Radial velocity (Rv) +3 km/s
Proper motion (μ) RA: -56.17 ± 0.18[1] mas/yr
Dec.: 16.19 ± 0.20[1] mas/yr
Parallax (π) 7.65 ± 0.22[1] mas
Distance 430 ± 10 ly
(131 ± 4 pc)
Absolute magnitude (MV) −1.13
Details
Mass 3.58 ± 0.05[2] M☉
Radius 2.4-3.1[3] R☉
Luminosity 306[2] L☉
Temperature 10,600[2] K
Rotational velocity (v sin i) 160[2] km/s
Other designations
HR 4460, HD 100673, CP−53°4637, FK5 2926, HIP 56480, SAO 239189, GC 15877
Database references
SIMBAD data

A Centauri (A Cen) is a star in the constellation Centaurus. It is a blue-white B-type main sequence dwarf with an apparent magnitude of +4.62 and is approximately 430 light years from Earth.



External links[edit]


  • Wikisky image of HD 100673 (A Centauri)


References[edit]





  1. ^ abcde van Leeuwen, F. (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..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output q{quotes:"""""""'""'"}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}
    Vizier catalog entry


  2. ^ abcd Zorec, J.; Royer, F. (January 2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691.


  3. ^ 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. arXiv:astro-ph/0012289. Bibcode:2001A&A...367..521P. doi:10.1051/0004-6361:20000451.














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