Kaus Australis

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

catalogues and names Kaus Australis, e Sgr, 20 Sgr, HR 6879, HD 169022, SAO 210091, FK5: 689, WDS 18241-3424
constellation Sagittarius

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

note (category: star names): KAUS AUSTRALIS.

position, motion, parallax:

position (J2000) RA: 18h 24min 10,3sec DEC: -34° 23' 5''
position (J1900) RA: 18h 17min 32sec DEC: -34° 25' 55''
proper motion (J2000) RA: -0,038 arcsec/a DEC: -0,124 arcsec/a
radial velocity -15 km/s
rotational velocity 140 km/s
trigonometric parallax 0,023 arcsec
note (category: radial and/or rotational velocities): Two discordant determinations of vsini, 0 and 175k/s.

magnitude

visual magnitude 1,85
(V on UBV Johnson system)

spectral / color information

spectral class B9.5III
B-V-magnitude -0,03
U-B-magnitude -0,13
R-I-magnitude -0,01

double/multiple star system information

separation 36,1 arcsec
mag difference (of double or brightest multiple) 12,3
note Worley (1978) update of the IDS

miscellaneous information

note (category: stellar radii or diameters): Diam. = 0.00137 - 0.00144".

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

position, motion, parallax:

position (J2000) RA: 18h 24min 10,327sec DEC: -34° 23' 4,73'' ±0,06 arcsec source: 15
proper motion (J2000) RA: -0,0031 arcsec/a DEC: -0,124 arcsec/a source: 25
radial velocity -15 km/s source: 25
trigonometric parallax 0,023 ±0,002 arcsec source: 25
galactic coord. (B1950) longitude: 359,2° latitude: -9,81°
GCI unit vector (J2000) X: 0,08688 Y: -0,820679 Z: -0,564746

magnitude:

visual 1,85 (observed) source: 25
photovisual 2 source: 2
photographic 2 source: 2

spectral information:

spectral class A0 source: 96
Morgan-Keenan B9.5III source: 25
B-magnitude 1,82 ±0,05 B-V-magnitude -0,03
U-magnitude 1,69 ±0,05 U-B-magnitude -0,13

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 36,1 arcsec
magnitude difference between brightest and second brightest component 6,5
position angle 302 °

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: 18h 20min 51,188sec DEC: -34° 24' 36,94'' ±0,008 arcsec
position (J2000) RA: 18h 24min 10,371sec DEC: -34° 23' 4,9''
proper motion J1950 (FK4) RA: -0,0026 arcsec/a DEC: -0,125 arcsec/a ±0,002 arcsec/a in RA
±0,002 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0026 arcsec/a DEC: -0,126 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

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

spectral information:

spectral class A0
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 689
Durchmusterung CD-3412784
Boss General Catalogue 25100
Henry Draper Catalogue 169022