a1Librae


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 a1Lib, 8 Lib, HR 5530, HD 130819, SAO 158836, FK5: 1387, WDS 14509-1603B
constellation Libra

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


position, motion, parallax:

position (J2000) RA: 14h 50min 41,2sec DEC: -15 59' 50''
position (J1900) RA: 14h 45min 9,2sec DEC: -15 34' 53''
proper motion (J2000) RA: -0,098 arcsec/a DEC: -0,066 arcsec/a
radial velocity -23 km/s
note: variable radial velocity
rotational velocity 22 km/s (uncertain) (variable)
trigonometric parallax 0,05 arcsec

magnitude

visual magnitude 5,15
(V on UBV Johnson system)

spectral / color information

spectral class F4IV
B-V-magnitude 0,41
U-B-magnitude -0,03
R-I-magnitude 0,19

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 5531 at 231". Component A, HR 5531, is the suspected occultation double, 3.4, 3.8, sep. 0.01".

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

position, motion, parallax:

position (J2000) RA: 14h 50min 41,207sec DEC: -15 59' 50,14'' 0,06 arcsec source: 15
proper motion (J2000) RA: -0,0068 arcsec/a DEC: -0,066 arcsec/a source: 25
radial velocity -23 km/s source: 25
trigonometric parallax 0,05 0,005 arcsec source: 25
galactic coord. (B1950) longitude: 340,32 latitude: 38,07
GCI unit vector (J2000) X: -0,706777 Y: -0,651549 Z: -0,275591

magnitude:

visual 5,15 (observed) source: 25
photovisual 5,3 source: 2
photographic 5,8 source: 2

spectral information:

spectral class F5 source: 96
Morgan-Keenan F4IV source: 25
B-magnitude 5,56 0,05 B-V-magnitude 0,41
U-magnitude 5,53 0,05 U-B-magnitude -0,03

double/multiple star system information:

source of data: 25
separation between brightest and second brightest component 231 arcsec
magnitude difference between brightest and second brightest component 2,4

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
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 47min 54,959sec DEC: -15 47' 25,9'' 0,006 arcsec
position (J2000) RA: 14h 50min 41,206sec DEC: -15 59' 50,32''
proper motion J1950 (FK4) RA: -0,007 arcsec/a DEC: -0,072 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0068 arcsec/a DEC: -0,068 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 5,3 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class F5
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 1387
Durchmusterung BD-15 3965
Boss General Catalogue 19970
Henry Draper Catalogue 130819

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.