b Arae

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 b Ara, HR 6461, HD 157244, SAO 244725, FK5: 645
constellation Ara

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


object is infrared source (Engels et al., 1982)

position, motion, parallax:

position (J2000) RA: 17h 25min 18sec DEC: -55° 31' 48''
position (J1900) RA: 17h 16min 59,1sec DEC: -55° 26' 7''
proper motion (J2000) RA: -0,008 arcsec/a DEC: -0,025 arcsec/a
radial velocity 0 km/s
trigonometric parallax 0,034 arcsec

magnitude

visual magnitude 2,85
(V on UBV Johnson system)

spectral / color information

spectral class K3Ib-IIa
B-V-magnitude 1,46
U-B-magnitude 1,56
R-I-magnitude 0,53 (Eggen)

double/multiple star system information

note (category: double and multiple data): Possibly CPM and same RV as HR 6462, 50'N.

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

position, motion, parallax:

position (J2000) RA: 17h 25min 17,999sec DEC: -55° 31' 47,61'' ±0,06 arcsec source: 15
proper motion (J2000) RA: -0,001 arcsec/a DEC: -0,025 arcsec/a source: 25
radial velocity 0 km/s source: 25
trigonometric parallax 0,034 ±0,003 arcsec source: 25
galactic coord. (B1950) longitude: 335,37° latitude: -11,01°
GCI unit vector (J2000) X: -0,085366 Y: -0,559501 Z: -0,824422

magnitude:

visual 2,85 (observed) source: 25
photovisual 2,8 source: 2

spectral information:

spectral class K2 source: 96
Morgan-Keenan K3Ib-IIa source: 25
B-magnitude 4,31 ±0,05 B-V-magnitude 1,46
U-magnitude 5,87 ±0,05 U-B-magnitude 1,56

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: 17h 21min 8,264sec DEC: -55° 29' 6,11'' ±0,01 arcsec
position (J2000) RA: 17h 25min 18,024sec DEC: -55° 31' 47,62''
proper motion J1950 (FK4) RA: -0,0001 arcsec/a DEC: -0,024 arcsec/a ±0,002 arcsec/a in RA
±0,002 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0006 arcsec/a DEC: -0,025 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 2,8 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class K2
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 645
Durchmusterung CP-55 8100
Boss General Catalogue 23515
Henry Draper Catalogue 157244