Cebalrai

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 Cebalrai, b Oph, NSV 23613, 60 Oph, HR 6603, HD 161096, SAO 122671, FK5: 665
other names Kelb Alrai, Kabalrai, Cheleb, Celb-al-Rai
constellation Ophiuchus

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

note (category: star names): Cebalrai; Kelb Alrai; Kabalrai; Cheleb; Celb-al-Rai.

object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

position, motion, parallax:

position (J2000) RA: 17h 43min 28,4sec DEC: +4° 34' 2''
position (J1900) RA: 17h 38min 31,9sec DEC: +4° 36' 32''
proper motion (J2000) RA: -0,04 arcsec/a DEC: 0,159 arcsec/a
radial velocity -12 km/s
note: variable radial velocity
rotational velocity =<17 km/s (uncertain) (variable)
trigonometric parallax 0,033 arcsec

magnitude

visual magnitude 2,77
(V on UBV Johnson system)

spectral / color information

spectral class K2III
B-V-magnitude 1,16
U-B-magnitude 1,24
R-I-magnitude 0,57

double/multiple star system information

note (category: double and multiple data): Possibly close double.

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

position, motion, parallax:

position (J2000) RA: 17h 43min 28,358sec DEC: +4° 34' 2,26'' ±0,06 arcsec source: 15
proper motion (J2000) RA: -0,0027 arcsec/a DEC: 0,159 arcsec/a source: 25
radial velocity -12 km/s source: 25
trigonometric parallax 0,033 ±0,003 arcsec source: 25
galactic coord. (B1950) longitude: 29,22° latitude: 17,19°
GCI unit vector (J2000) X: -0,071823 Y: -0,994234 Z: 0,07963

magnitude:

visual 2,77 (observed) source: 25
photovisual 2,9 source: 2

spectral information:

spectral class K0 source: 96
Morgan-Keenan K2IIICN0.5 source: 25
B-magnitude 3,93 ±0,05 B-V-magnitude 1,16
U-magnitude 5,17 ±0,05 U-B-magnitude 1,24

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 41min 0,041sec DEC: +4° 35' 11,84'' ±0,003 arcsec
position (J2000) RA: 17h 43min 28,357sec DEC: +4° 34' 2,2''
proper motion J1950 (FK4) RA: -0,0028 arcsec/a DEC: 0,159 arcsec/a ±0,001 arcsec/a in RA
±0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0027 arcsec/a DEC: 0,159 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 2,9 (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: 665
Durchmusterung BD+04 3489
Boss General Catalogue 24048
Henry Draper Catalogue 161096