catalogues and names

The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version)

SKY2000 - Master Star Catalog

Smithsonian Astrophysical Observatory Star Catalog

Combined General Catalogue of Variable Stars (suspected variables)

catalogues and names

catalogues and names	Gienah Ghurab, g Crv, NSV 05515, 4 Crv, HR 4662, HD 106625, SAO 157176, BD -16 3424, 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.

position, motion, parallax:

position (J2000)	RA: 12h 15min 48.4sec	DEC: -17° 32' 31''
position (B1900)	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)
galactic coordinates	longitude: 290.99°	latitude: 44.5°

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

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°

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 (B1950)	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 B1950 (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 (equinox 1950.0)

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)).