Rigil Kentaurus

The object was found in the following catalogues:
  1. The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version)

  2. SKY2000 - Master Star Catalog

  3. Smithsonian Astrophysical Observatory Star Catalog

  4. The Washington Visual Double Star Catalog, 1996.0

catalogues and names Rigil Kentaurus, a1Cen, NSV 20145, HR 5459, HD 128620, SAO 252838, FK5: 538, WDS 14396-6050A
other names Rigil Kent, Toliman
constellation Centaurus

data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)

note (category: star names): Rigel Kentaurus; RIGIL KENT; Toliman.

object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

position, motion, parallax:

position (J2000) RA: 14h 39min 35,9sec DEC: -60° 50' 7''
position (J1900) RA: 14h 32min 48,3sec DEC: -60° 25' 22''
proper motion (J2000) RA: -3,642 arcsec/a DEC: 0,699 arcsec/a
radial velocity -22 km/s
note: spectroscopic binaries
note: orbital data avaible
trigonometric parallax 0,751 arcsec
note (category: dynamical parallaxes): 0.750".

magnitude

visual magnitude -0,01
(V on UBV Johnson system)

spectral / color information

spectral class G2V
B-V-magnitude 0,71
U-B-magnitude 0,24
R-I-magnitude 0,22 (Eggen)
note (category: spectra): Components A and B have about twice the metal abundance of the Sun and an age of about 6 billion years.

double/multiple star system information

number of components of multiple star system 3
separation 20,9 arcsec
mag difference (of double or brightest multiple) 1,4
component ID AB
note Worley (1978) update of the IDS
note (category: double and multiple data): AB 79.920y, a = 17.515". B = HR 5460, CPM with Proxima at 2.2d, discovered by Innes in 1915, a flare star, V 645 Cen, 12.4 - 13.4p, 11.10V, +1.88(B-V), +2.05(R-I), M5.5Ve.
note (category: spectroscopic binaries): 81.18y or 29.652d, K 5.0k/s, V0 -21.6k/s, msin3i 0.939, asini 1730.

data from SKY2000 - Master Star Catalog (Myers+ 1997)

position, motion, parallax:

position (J2000) RA: 14h 39min 36,471sec DEC: -60° 50' 2,72'' ±0,06 arcsec source: 15
proper motion (J2000) RA: -0,4983 arcsec/a DEC: 0,699 arcsec/a source: 25
radial velocity -22 km/s source: 25
trigonometric parallax 0,751 ±0,075 arcsec source: 25
galactic coord. (B1950) longitude: 315,78° latitude: -0,71°
GCI unit vector (J2000) X: -0,37386 Y: -0,312617 Z: -0,873212

magnitude:

visual -0,01 (observed) source: 25
photovisual 0,3 source: 2
photographic 0,9 source: 2

spectral information:

spectral class G0 source: 96
Morgan-Keenan G2V source: 25
B-magnitude 0,7 ±0,05 B-V-magnitude 0,71
U-magnitude 0,94 ±0,05 U-B-magnitude 0,24

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 18,77 arcsec
magnitude difference between brightest and second brightest component 1,34
position angle 215 °

component magnitude spectral class catalogue(s)/name(s)
A -0,01 G0 Rigil Kentaurus, a1Centauri, HR 5459, HD 128620, SAO 252838
B 1,33 K5 a2Centauri, HR 5460, HD 128621,

sources:

2 HD and HDE Catalogs
Cannon, A.J., and E.C. Pickering, Harvard Annals, Vols 91-99, 1918-24, Cambridge, Massachusetts: Harvard University; Cannon, A.J., Harvard Annals, Vol. 100, 1925-36, Cambridge, Massachusetts: Harvard University; and Cannon, A.J., and M. Walton Mayall, Harvard Annals, Vol. 112, 1949, Cambridge, Massachusetts: Harvard University
15 FK5, FK5 Extension and FK5 Supplement
Fricke, W., H. Schwan and T. Lederle, "Fifth Fundamental Catalogue (FK5), Part I. The Basic Fundamental Stars," Veroff. Astronomisches Recheninstitut, No. 32, Heidelberg, Germany, 1988, and Fricke, W., H. Schwan, and T.E. Corbin, "Fifth Fundamental Catalogue (FK5), Part II. The FK5 Extension," Veröff. Astronomisches Recheninstitut, No. 33, Heidelberg, Germany, 1991
19 WDS Catalog
Worley, C.E., and G.G. Douglass, Washington Catalog of Visual Double Stars 1996.0, United States Naval Observatory, 1996
25 Bright Star Catalogue, 5th edition
Hoffleit, D. and Warren, W.H. Jr., The Bright Star Catalogue, 5th Revised Edition, Version 2, 1994
96 SAO or HD/HDE Catalog
Reference from Value 1 or Reference from Value 2

data from Smithsonian Astrophysical Observatory Star Catalog (SAO Staff 1966; USNO, ADC 1990)

position and proper motion:

position (J1950) RA: 14h 36min 11,253sec DEC: -60° 37' 48,84'' ±0,009 arcsec
position (J2000) RA: 14h 39min 36,167sec DEC: -60° 50' 7,35''
proper motion J1950 (FK4) RA: -0,4904 arcsec/a DEC: 0,712 arcsec/a ±0,002 arcsec/a in RA
±0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,4949 arcsec/a DEC: 0,699 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 0,1 (accuracy: 2 decimals)
source of visual magnitude data Combined magnitude of component stars.

spectral information:

spectral class +++
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

remarks for duplicity and variability

Double star - see source catalog for source

catalogues

source catalogue FK4, catalogue number: 538
Durchmusterung CP-60 5483
Boss General Catalogue 19728
Henry Draper Catalogue 128620
The "SAO Catalog" entry refers to two consecutive HD numbers, the lower of which is given.

data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)

position and proper motion:

position (J2000) RA: 14h 39,6min DEC: -60° 50'
proper motion (J2000) RA: 0 arcsec/a DEC: 0,699 arcsec/a

double/multiple star system information:

component year number of measures position angle angular separation magnitude of 1st component magnitude of 2nd component spectral class(es) discoverer code
- 1752 often ° '' -0,01 1,33 G2V K1V RHD 1

discoverer information:

discoverer code discoverer reference
RHD 1 Richaud (Unpublished.)

notes:

note Alpha Cen. P= 79.9yr, a = 17.52", motion direct. Proper motion -3642 +699. The distant companion, Proxima Centauri, distance 9000" was discovered by Innes. It is the flare star V645 Cen.