Rukbat


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 Rukbat, a Sgr, HR 7348, HD 181869, SAO 229659, FK5: 728
other names Rucba, Rukbat al Rami, Alrami
constellation Sagittarius

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

note (category: star names): Rukbat; Rucba; Rukbat al Rami; Alrami.

position, motion, parallax:

position (J2000) RA: 19h 23min 53,2sec DEC: -40 36' 58''
position (J1900) RA: 19h 16min 57,5sec DEC: -40 48' 14''
proper motion (J2000) RA: 0,03 arcsec/a DEC: -0,123 arcsec/a
radial velocity -1 km/s
note: spectroscopic binaries
rotational velocity 89 km/s (uncertain) (variable)

magnitude

visual magnitude 3,97
(V on UBV Johnson system)

spectral / color information

spectral class B8V
B-V-magnitude -0,1
U-B-magnitude -0,33

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

position, motion, parallax:

position (J2000) RA: 19h 23min 53,168sec DEC: -40 36' 57,58'' 0,06 arcsec source: 15
proper motion (J2000) RA: 0,0027 arcsec/a DEC: -0,123 arcsec/a source: 25
radial velocity -1 km/s source: 25
galactic coord. (B1950) longitude: 357,72 latitude: -23,09
GCI unit vector (J2000) X: 0,271681 Y: -0,708806 Z: -0,650986

magnitude:

visual 3,97 (observed) source: 25
photovisual 4,1 source: 2
photographic 4,1 source: 2

spectral information:

spectral class B8 source: 96
Morgan-Keenan B8V source: 25
B-magnitude 3,87 0,05 B-V-magnitude -0,1
U-magnitude 3,54 0,05 U-B-magnitude -0,33

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: 19h 20min 25,492sec DEC: -40 42' 43,1'' 0,011 arcsec
position (J2000) RA: 19h 23min 53,172sec DEC: -40 36' 57,52''
proper motion J1950 (FK4) RA: 0,0026 arcsec/a DEC: -0,121 arcsec/a 0,003 arcsec/a in RA
0,003 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0027 arcsec/a DEC: -0,123 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 4,1 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class B8
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 728
Durchmusterung CD-4013245
Boss General Catalogue 26737
Henry Draper Catalogue 181869