Zuben Elgenubi

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

note (category: star names):

Zuben Elgenubi; Zubenelgenubi; Kiffa Australis; Elkhiffa Australis.

position, motion, parallax:

position (J2000)	RA: 14h 50min 52.7sec	DEC: -16° 2' 30''
position (2000.73)	RA: 14h 50min 55sec	DEC: -16° 2' 41''
position (B1900)	RA: 14h 45min 20.7sec	DEC: -15° 37' 34''
proper motion (J2000)	RA: -0.106 arcsec/a	DEC: -0.067 arcsec/a
radial velocity	-10 km/s note: spectroscopic binaries
rotational velocity	84 km/s (uncertain) (variable)
trigonometric parallax	0.058 arcsec
galactic coordinates	longitude: 340.33°	latitude: 38.01°

magnitude

visual magnitude

2.75
(V on UBV Johnson system)

spectral / color information

spectral class	A3IV
B-V-magnitude	0.15
U-B-magnitude	0.09
R-I-magnitude
IR-note	object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

variability information

variable star identification

6827

double/multiple star system information

number of components of multiple star system	3
separation	0 arcsec
mag difference (of double or brightest multiple)	0.4
component ID	O
note	Worley (1978) update of the IDS

note (category: double and multiple data):

CPM with HR 5530. Suspected occultation double.

miscellaneous information

note (category: stellar radii or diameters):

About 2 solar radii.

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

position, motion, parallax:

position (J2000)	RA: 14h 50min 52.713sec	DEC: -16° 2' 30.42''	ą0.06 arcsec	source: 15
position (2000.73)	RA: 14h 50min 55sec	DEC: -16° 2' 41''	JD: 2451810.12
proper motion (J2000)	RA: -0.0073 arcsec/a	DEC: -0.067 arcsec/a		source: 25
radial velocity	-10 km/s			source: 25
trigonometric parallax	0.058 arcsec		ą0.006 arcsec	source: 25
galactic coord. (B1950)	longitude: 340.33°	latitude: 38.01°

magnitude:

visual	2.75 (observed)	source: 25
photovisual	2.9	source: 2
photographic	3	source: 2

spectral information:

spectral class	A3		source: 96
Morgan-Keenan	A3IV		source: 25
B-magnitude	2.9 ą0.05	B-V-magnitude	0.15
U-magnitude	2.99 ą0.05	U-B-magnitude	0.09

variability information:

source of data: 28

variability type	9
var. amplitude	0.03

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	231 arcsec
magnitude difference between brightest and second brightest component	2.4
position angle	314 °

component	magnitude	spectral class	catalogue(s)/name(s)
A	2.75	A3	Zuben Elgenubi, a²Librae, 9 Lib, HR 5531, HD 130841, SAO 158840
B	5.15	F5	a¹Librae, 8 Lib, HR 5530, HD 130819, SAO 158836

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: 14h 48min 6.447sec	DEC: -15° 50' 6.59''	ą0.003 arcsec
position (2000.73)	RA: 14h 50min 55sec	DEC: -16° 2' 38''	JD: 2451810.12
position (J2000)	RA: 14h 50min 52.719sec	DEC: -16° 2' 30.39''
proper motion B1950 (FK4)	RA: -0.0075 arcsec/a	DEC: -0.071 arcsec/a	ą0.001 arcsec/a in RA ą0.001 arcsec/a in DEC
proper motion J2000 (FK5)	RA: -0.0073 arcsec/a	DEC: -0.067 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	2.9 (accuracy: 2 decimals)
source of visual magnitude data	Taken from the "Henry Draper Catalogue".

spectral information:

spectral class	A3
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	FK4, catalogue number: 548
Durchmusterung	BD-15 3966
Boss General Catalogue	19975
Henry Draper Catalogue	130841

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

position and proper motion:

position (J2000)	RA: 14h 50.9min	DEC: -16° 3'
proper motion (J2000)	RA: -0.106 arcsec/a	DEC: -0.067 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
AB	1823	6	314°	231''	2.75	5.15	A3IV F4IV	SHJ 186
AC	1987	1	291°	277.9''	2.75	13.2	-	AOT 53
BC	1987	1	236°	112.5''	5.15	13.2	-	AOT 53

discoverer information:

discoverer code	discoverer	reference
SHJ 186	South & Herschel	-
AOT 53	-	-

notes:

note	Alpha (2) Lib. B is BD-15@3965. Proper motion of B -088 -056. A is a spectroscopic binary.

data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)

position:

position (equinox 1950.0)

RA: 14h 48min 6.4sec

DEC: -15° 50' 7''

variability informations:

magnitute at max. brightness	2.72
magnitute at min. brightness	2.75
photometric system	visual, photovisual or Johnson's V

spectral information

spectral class

references

to a study

660820D (designation: HR 5531)

miscanellous

There are notes in the published catalog (Kukarkin et al.(1982)).

catalogues and names	Zuben Elgenubi, a²Lib, NSV 06827, 9 Lib, HR 5531, HD 130841, SAO 158840, BD -15 3966, FK5: 548, WDS 14509-1603A
other names	Zubenelgenubi, Kiffa Australis, Elkhiffa Australis
constellation	Libra