a Indi

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 a Ind, HR 7869, HD 196171, SAO 230300, FK5: 769, WDS 20376-4717A
constellation Indus

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


position, motion, parallax:

position (J2000) RA: 20h 37min 34sec DEC: -47° 17' 29''
position (J1900) RA: 20h 30min 32,1sec DEC: -47° 38' 24''
proper motion (J2000) RA: 0,053 arcsec/a DEC: 0,066 arcsec/a
radial velocity -1 km/s
trigonometric parallax 0,046 arcsec

magnitude

visual magnitude 3,11
(V on UBV Johnson system)

spectral / color information

spectral class K0IIICNIII-IV
B-V-magnitude 1
U-B-magnitude 0,79
R-I-magnitude 0,36 (Eggen)

double/multiple star system information

number of components of multiple star system 3
separation 66 arcsec
mag difference (of double or brightest multiple) 8,8
component ID AB
note Worley (1978) update of the IDS

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

position, motion, parallax:

position (J2000) RA: 20h 37min 34,044sec DEC: -47° 17' 29,41'' ±0,06 arcsec source: 15
proper motion (J2000) RA: 0,0052 arcsec/a DEC: 0,066 arcsec/a source: 25
radial velocity -1 km/s source: 25
trigonometric parallax 0,046 ±0,005 arcsec source: 25
galactic coord. (B1950) longitude: 352,57° latitude: -37,21°
GCI unit vector (J2000) X: 0,430443 Y: -0,524182 Z: -0,734814

magnitude:

visual 3,11 (observed) source: 25
photovisual 3,2 source: 2
photographic 4,2 source: 2

spectral information:

spectral class K0 source: 96
Morgan-Keenan K0IIICNIII-IV source: 25
B-magnitude 4,11 ±0,05 B-V-magnitude 1
U-magnitude 4,9 ±0,5 U-B-magnitude 0,79

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 66 arcsec
magnitude difference between brightest and second brightest component 8,9
position angle 199 °

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: 20h 34min 3,529sec DEC: -47° 28' 2,93'' ±0,009 arcsec
position (J2000) RA: 20h 37min 34,058sec DEC: -47° 17' 29,35''
proper motion J1950 (FK4) RA: 0,0055 arcsec/a DEC: 0,07 arcsec/a ±0,002 arcsec/a in RA
±0,002 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0054 arcsec/a DEC: 0,066 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

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

spectral information:

spectral class K0
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 769
Durchmusterung CD-4713477
Boss General Catalogue 28682
Henry Draper Catalogue 196171

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

position and proper motion:

position (J2000) RA: 20h 37,6min DEC: -47° 17'
proper motion (J2000) RA: 0,053 arcsec/a DEC: 0,066 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 1896 3 199° 66'' 3,11 12 - HJ 5209
AC 1900 2 343° 62'' 3,11 13,5 K0III HJ 5209

discoverer information:

discoverer code discoverer reference
HJ 5209 Herschel, J. -

notes:

note Alpha Ind. Spectrum K0IIICNIII-IV.