Rigel

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

note (category: star names):

RIGEL; Algebar; Elgebar.

position, motion, parallax:

position (J2000)	RA: 5h 14min 32.3sec	DEC: -8° 12' 6''
position (B1900)	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
galactic coordinates	longitude: 209.24°	latitude: -25.25°

note (category: dynamical parallaxes):

0.004".

magnitude

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

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 arcsec		±0.001 arcsec	source: 25
galactic coord. (B1950)	longitude: 209.24°	latitude: -25.25°

magnitude:

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 °

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 (B1950)	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 B1950 (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

magnitude:

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.

catalogues

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
A-BC	1990	82	204°	-	0.3	10.4	B8Iae:	STF 668
AD	1878	5	2°	44.5''	3.4	15.4	B8	BU 555
AD	1921	5	1°	43.9''	3.4	15.4	B8	BU 555
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.	-

notes:

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

catalogues and names	Rigel, b Ori, bet Ori, 19 Ori, HR 1713, HD 34085, SAO 131907, BD -8 1063, FK5: 194, WDS 05145-0812A
other names	Algebar, Elgebar
constellation	Orion