Adharaz


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 Adharaz, e CMa, 21 CMa, HR 2618, HD 52089, SAO 172676, FK5: 268, WDS 06586-2858
other names Adara, Adhara
constellation Canis Major

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

note (category: star names): ADARA; ADHARA.

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

position, motion, parallax:

position (J2000) RA: 6h 58min 37,5sec DEC: -28 58' 20''
position (J1900) RA: 6h 54min 41,7sec DEC: -28 50' 9''
proper motion (J2000) RA: 0,004 arcsec/a DEC: 0,003 arcsec/a
radial velocity 27 km/s
rotational velocity 44 km/s (uncertain) (variable)
dynamical parallax 0,001 arcsec

magnitude

visual magnitude 1,5
(V on UBV Johnson system)

spectral / color information

spectral class B2II
B-V-magnitude -0,21
U-B-magnitude -0,93
R-I-magnitude -0,21
note (category: spectra): Lyman alpha observed from COPERNICUS.
note (category: colors): Color excess E(B-V) = +0.02.

double/multiple star system information

separation 7,5 arcsec
mag difference (of double or brightest multiple) 6,4
note (category: double and multiple data): Fixed sep.

miscellaneous information

note (category: group membership): Member of Pleiades group.
note (category: stellar radii or diameters): Diam. = 0.00077 - 0.00080".

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

position, motion, parallax:

position (J2000) RA: 6h 58min 37,548sec DEC: -28 58' 19,5'' 0,06 arcsec source: 15
proper motion (J2000) RA: 0,0003 arcsec/a DEC: 0,003 arcsec/a source: 25
radial velocity 27 km/s source: 25
galactic coord. (B1950) longitude: 239,83 latitude: -11,33
GCI unit vector (J2000) X: -0,221358 Y: 0,846388 Z: -0,484383

magnitude:

visual 1,5 (observed) source: 25
photovisual 1,6 source: 2
photographic 1,4 source: 2

spectral information:

spectral class B1 source: 96
Morgan-Keenan B2II source: 25
B-magnitude 1,29 0,05 B-V-magnitude -0,21
U-magnitude 0,36 0,05 U-B-magnitude -0,93

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 7,5 arcsec
magnitude difference between brightest and second brightest component 6
position angle 161

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: 6h 56min 39,587sec DEC: -28 54' 10,24'' 0,005 arcsec
position (J2000) RA: 6h 58min 37,561sec DEC: -28 58' 19,41''
proper motion J1950 (FK4) RA: 0,0001 arcsec/a DEC: 0,002 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0005 arcsec/a DEC: 0,004 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 1,6 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class B1
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 268
Durchmusterung CD-28 3666
Boss General Catalogue 9188
Henry Draper Catalogue 52089

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

position and proper motion:

position (J2000) RA: 6h 58,6min DEC: -28 58'
proper motion (J2000) RA: 0,004 arcsec/a DEC: 0,003 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
- 1850 19 161 7,5'' 1,5 7,5 B2II CPO 7

discoverer information:

discoverer code discoverer reference
CPO 7 Cape Observatory -

notes:

note Epsilon CMa.