Gienah Ghurab


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. Combined General Catalogue of Variable Stars (suspected variables)


catalogues and names Gienah Ghurab, g Crv, NSV 05515, 4 Crv, HR 4662, HD 106625, SAO 157176, FK5: 457
constellation Corvus

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

note (category: star names): Gienah Ghurab; Gienah, a name also applied to HR 7949.

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

position, motion, parallax:

position (J2000) RA: 12h 15min 48,4sec DEC: -17 32' 31''
position (J1900) RA: 12h 10min 39,7sec DEC: -16 59' 12''
proper motion (J2000) RA: -0,161 arcsec/a DEC: 0,023 arcsec/a
radial velocity -4 km/s
note: spectroscopic binaries
rotational velocity 41 km/s (uncertain) (variable)

magnitude

visual magnitude 2,59
(V on UBV Johnson system)

spectral / color information

spectral class B8IIIpHgMn
B-V-magnitude -0,11
U-B-magnitude -0,34
R-I-magnitude -0,09

variability information

variable star identification 5515
note (category: variability): Expanding circumstellar shell.

miscellaneous information

note (category: group membership): Hyades group; probable blue straggler.
note (category: stellar radii or diameters): Diam. = 0.00072 - 0.00075".
note (category: miscellaneous): Old disk population runaway star.

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

position, motion, parallax:

position (J2000) RA: 12h 15min 48,366sec DEC: -17 32' 30,97'' 0,06 arcsec source: 15
proper motion (J2000) RA: -0,0112 arcsec/a DEC: 0,023 arcsec/a source: 25
radial velocity -4 km/s source: 25
galactic coord. (B1950) longitude: 291 latitude: 44,5
GCI unit vector (J2000) X: -0,95123 Y: -0,065708 Z: -0,301404

magnitude:

visual 2,59 (observed) source: 25
photovisual 2,8 source: 2
photographic 2,7 source: 2

spectral information:

spectral class B8 source: 96
Morgan-Keenan B8IIIpHgMn source: 25
B-magnitude 2,48 0,05 B-V-magnitude -0,11
U-magnitude 2,14 0,05 U-B-magnitude -0,34

variability information:

source of data: 28
variability type 9
var. amplitude 0,04

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: 12h 13min 13,843sec DEC: -17 15' 51,84'' 0,005 arcsec
position (J2000) RA: 12h 15min 48,371sec DEC: -17 32' 30,99''
proper motion J1950 (FK4) RA: -0,0114 arcsec/a DEC: 0,018 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0112 arcsec/a DEC: 0,023 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 B8
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 457
Durchmusterung BD-16 3424
Boss General Catalogue 16740
Henry Draper Catalogue 106625

data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)

position:

position (J1950) RA: 12h 13min 13,8sec DEC: -17 15' 52''

variability informations:

magnitute at max. brightness 2,56
magnitute at min. brightness 2,6
photometric system visual, photovisual or Johnson's V

spectral information

spectral class B8

references

to a study 290477D (designation: ZI 921)

miscanellous

There are notes in the published catalog (Kukarkin et al.(1982)).