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 Rigel, b Ori, bet Ori, 19 Ori, HR 1713, HD 34085, SAO 131907, FK5: 194, WDS 05145-0812A
other names Algebar, Elgebar
constellation Orion

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

note (category: star names): RIGEL; Algebar; Elgebar.

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

position, motion, parallax:

position (J2000) RA: 5h 14min 32,3sec DEC: -8 12' 6''
position (J1900) RA: 5h 9min 43,9sec DEC: -8 19' 1''
proper motion (J2000) RA: 0 arcsec/a DEC: -0,001 arcsec/a
radial velocity 21 km/s
note: spectroscopic binaries
rotational velocity 33 km/s (uncertain) (variable)
trigonometric parallax 0,013 arcsec
note (category: dynamical parallaxes): 0.004".


visual magnitude 0,12
(V on UBV Johnson system)

spectral / color information

spectral class B8Ia:
B-V-magnitude -0,03
U-B-magnitude -0,66
R-I-magnitude -0,02
note (category: spectra): Between wavelengths 10660 and 10915 no stellar lines except the chromospheric line He 10830. Weak magnetic field.
note (category: colors): Color excess E(B-V) = +0.00.

variability information

variable star identification 1882
note (category: variability): 0.03 - 0.30V, 25d. Amp. at 0.58 micrometers about 0.06m.

double/multiple star system information

number of components of multiple star system 4
separation 9,5 arcsec
mag difference (of double or brightest multiple) 6,5
component ID AB
note (category: double and multiple data): AxBC, CPM. BC binary, 7.6 B8II, 7.6v sep. 0.12". D, 15.4v at 44". BC also classified B5V+B5V. For B, vsini =<39k/s.
note (category: spectroscopic binaries): ADS 3823B, 9.860d, K 25.0k/s, V0 +19.1, asini 3.37. May be due to pulsation.

miscellaneous information

note (category: group membership): Ori OB1; in reflection nebula; member assoc. Tau-Ori R1 at 360 pc.
note (category: stellar radii or diameters): Diam. = 0.00243 - 0.00255".

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

position, motion, parallax:

position (J2000) RA: 5h 14min 32,268sec DEC: -8 12' 5,98'' 0,06 arcsec source: 15
proper motion (J2000) RA: 0 arcsec/a DEC: -0,001 arcsec/a source: 25
radial velocity 21 km/s source: 25
trigonometric parallax 0,013 0,001 arcsec source: 25
galactic coord. (B1950) longitude: 209,24 latitude: -25,25
GCI unit vector (J2000) X: 0,195052 Y: 0,970362 Z: -0,142658


visual 0,12 (observed) source: 25
photovisual 0,3 source: 2
photographic 0,3 source: 2

spectral information:

spectral class B8 source: 96
Morgan-Keenan B8Ia: source: 25
B-magnitude 0,09 0,05 B-V-magnitude -0,03
U-magnitude -0,57 0,05 U-B-magnitude -0,66

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 9,5 arcsec
magnitude difference between brightest and second brightest component 10,1
position angle 204


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: 5h 12min 7,99sec DEC: -8 15' 28,65'' 0,003 arcsec
position (J2000) RA: 5h 14min 32,281sec DEC: -8 12' 6''
proper motion J1950 (FK4) RA: -0,0002 arcsec/a DEC: -0,002 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0002 arcsec/a DEC: -0,002 arcsec/a
source of proper motion data Determined by source catalog


visual 0,3 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class B8p
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.


source catalogue FK4, catalogue number: 194
Durchmusterung BD-08 1063
Boss General Catalogue 6410
Henry Draper Catalogue 34085

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

position and proper motion:

position (J2000) RA: 5h 14,5min DEC: -8 12'
proper motion (J2000) RA: 0 arcsec/a DEC: -0,001 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
A-BC 1822 82 198 9,5'' 0,3 10,4 B8Iae: STF 668
1990 204 -
AD 1878 5 2 44,5'' 3,4 15,4 B8 BU 555
1921 1 43,9''
BC 1878 17 '' 10,4 10,4 B9 BU 555

discoverer information:

discoverer code discoverer reference
STF 668 Struve, F.G.W. -
BU 555 Burnham, S.W. -


note Rigel, Beta Ori. The companion is a spectroscopic binary and suspected visual double, although it remains unconfirmed.