Zuben Elgenubi

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

  5. Combined General Catalogue of Variable Stars (suspected variables)

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

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

note (category: star names): Zuben Elgenubi; Zubenelgenubi; Kiffa Australis; Elkhiffa Australis.

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

position, motion, parallax:

position (J2000) RA: 14h 50min 52,7sec DEC: -16° 2' 30''
position (J1900) 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

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 0,04

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'' ±0,06 arcsec source: 15
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 ±0,006 arcsec source: 25
galactic coord. (B1950) longitude: 340,33° latitude: 38,01°
GCI unit vector (J2000) X: -0,706074 Y: -0,651994 Z: -0,276338

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 ±0,05 B-V-magnitude 0,15
U-magnitude 2,99 ±0,05 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 (J1950) RA: 14h 48min 6,447sec DEC: -15° 50' 6,59'' ±0,003 arcsec
position (J2000) RA: 14h 50min 52,719sec DEC: -16° 2' 30,39''
proper motion J1950 (FK4) RA: -0,0075 arcsec/a DEC: -0,071 arcsec/a ±0,001 arcsec/a in RA
±0,001 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 (J1950) 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 AM

references

to a study 660820D (designation: HR 5531)

miscanellous

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