catalogues and names

The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version)

SKY2000 - Master Star Catalog

Smithsonian Astrophysical Observatory Star Catalog

The Washington Visual Double Star Catalog, 1996.0

Combined General Catalogue of Variable Stars (Vol. I-III)

catalogues and names

catalogues and names	Agena, b Cen, bet Cen, HR 5267, HD 122451, SAO 252582, CP -59 5365, FK5: 518, WDS 14038-6022
other names	Hadar
constellation	Centaurus

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

note (category: star names):

AGENA; HADAR.

position, motion, parallax:

position (J2000)	RA: 14h 3min 49.4sec	DEC: -60° 22' 23''
position (2000.72)	RA: 14h 3min 52sec	DEC: -60° 22' 35''
position (B1900)	RA: 13h 56min 45.8sec	DEC: -59° 53' 26''
proper motion (J2000)	RA: -0.032 arcsec/a	DEC: -0.019 arcsec/a
radial velocity	6 km/s note: spectroscopic binaries
rotational velocity	139 km/s (uncertain) (variable)
trigonometric parallax	0.009 arcsec
galactic coordinates	longitude: 311.77°	latitude: 1.25°

magnitude

visual magnitude

0.61 (V on UBV Johnson system)

spectral / color information

spectral class	B1III
B-V-magnitude	-0.23
U-B-magnitude	-0.98

note (category: spectra):

Lyman alpha observed from COPERNICUS; spectra revealed MgII emission.

note (category: colors):

Color excess E(B-V) = +0.02. Soft X-ray source.

variability information

variable star identification

Bet Cen

note (category: variability):

Beta C? Amp. 0.07V, 0.157d, modulation 352d. Line profiles also vary per. 0.157d.

double/multiple star system information

separation	1.3 arcsec
mag difference (of double or brightest multiple)	3.2
note	Worley (1978) update of the IDS

note (category: spectroscopic binaries):

0.157d and 352d. Interferometer measures indicate multiple star.

miscellaneous information

note (category: group membership):

Sco-Cen assoc.

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

position, motion, parallax:

position (J2000)	RA: 14h 3min 49.408sec	DEC: -60° 22' 22.79''	±0.06 arcsec	source: 15
position (2000.72)	RA: 14h 3min 52sec	DEC: -60° 22' 35''	JD: 2451809.16
proper motion (J2000)	RA: -0.0043 arcsec/a	DEC: -0.019 arcsec/a		source: 25
radial velocity	6 km/s			source: 25
trigonometric parallax	0.009 arcsec		±0.001 arcsec	source: 25
galactic coord. (B1950)	longitude: 311.77°	latitude: 1.25°

magnitude:

visual	0.61 (observed)	source: 25
photovisual	0.9	source: 2
photographic	0.6	source: 2

spectral information:

spectral class	B1		source: 96
Morgan-Keenan	B1III		source: 25
B-magnitude	0.38 ±0.05	B-V-magnitude	-0.23
U-magnitude	-0.6 ±0.05	U-B-magnitude	-0.98

variability information:

source of data: 30

variability type	140
var. amplitude	0.05
var. period	0.16

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	1.3 arcsec
magnitude difference between brightest and second brightest component	3
position angle	251 °

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
30	GCVS, 4th edition
Kholopov, P.N., et al., General Catalogue of Variable Stars, fourth edition, Moscow: Nauka Publishing House, 1985-88
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: 14h 0min 16.51sec	DEC: -60° 7' 58.09''	±0.007 arcsec
position (2000.72)	RA: 14h 3min 53sec	DEC: -60° 22' 34''	JD: 2451809.16
position (J2000)	RA: 14h 3min 49.462sec	DEC: -60° 22' 22.73''
proper motion B1950 (FK4)	RA: -0.0027 arcsec/a	DEC: -0.023 arcsec/a	±0.001 arcsec/a in RA ±0.002 arcsec/a in DEC
proper motion J2000 (FK5)	RA: -0.0035 arcsec/a	DEC: -0.019 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	0.9 (accuracy: 2 decimals)
source of visual magnitude data	Taken from the "Henry Draper Catalogue".

spectral information:

spectral class	B1
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	FK4, catalogue number: 518
Durchmusterung	CP-59 5365
Boss General Catalogue	18971
Henry Draper Catalogue	122451

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

position and proper motion:

position (J2000)	RA: 14h 3.8min	DEC: -60° 22'
proper motion (J2000)	RA: -0.032 arcsec/a	DEC: -0.019 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
-	1935	22	259°	1.3''	0.7	3.7	B1III	VOU 31
	1960		251°	-

discoverer information:

discoverer code	discoverer	reference
VOU 31	Voute, J.G.	-

notes:

note	Beta Cen. Spectroscopic and interferometric measures indicate a multiple system.

data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)

position:

position (equinox 1950.0)

RA: 14h 0min 16.5sec

DEC: -60° 7' 58''

variability informations:

variability type	BCEP	pulsating variable star
magnitute at max. brightness	0.61
magnitute amplitude	0.045
photometric system	visual, photovisual or Johnson's V
period [d]	0.157

spectral information

spectral class

B1III

references

to a study	Vol. I GCVS (see Kholopov et al. 1985-1988)
to a chart/photograph	Vol. I GCVS (see Kholopov et al. 1985-1988)

miscanellous

ID in the GCVS catalogue	19/9002
constellation	Centaurus
notes on existence	The star is equivalent to '0199004 del'.
There are notes in published catalog.

variability type description

variability type

description

BCEP

Variables of the Beta Cephei type (Beta Cep, Beta CMa), which are pulsating O8-B6 I-V stars with periods of light and radial-velocity variations in the range of 0.1 - 0.6 days and light amplitudes from 0.01 to 0.3 mag in V. The light curves are similar in shape to average radial-velocity curves but lag in phase by a quarter of the period, so that maximum brightness corresponds to maximum contraction, i.e., to minimum stellar radius. The majority of these stars probably show radial pulsations, but some (V649 Per) display nonradial pulsations; multiperiodicity is characteristic of many of these stars.