catalogues and names

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

SKY2000 - Master Star Catalog

Smithsonian Astrophysical Observatory Star Catalog

The Washington Visual Double Star Catalog, 1996.0

Combined General Catalogue of Variable Stars (Vol. I-III)

catalogues and names

catalogues and names	V0832 Cyg, 59 Cyg, HR 8047, HD 200120, SAO 50335, BD +46 3133, FK5: 1551, WDS 20598+4731A
constellation	Cygnus

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

position, motion, parallax:

position (J2000)	RA: 20h 59min 49.6sec	DEC: +47° 31' 16''
position (B1900)	RA: 20h 56min 25.4sec	DEC: +47° 7' 50''
proper motion (J2000)	RA: 0.006 arcsec/a	DEC: 0.002 arcsec/a
radial velocity	1 km/s note: spectroscopic binaries
rotational velocity	374 km/s (uncertain) (variable)
galactic coordinates	longitude: 88.03°	latitude: 0.97°

magnitude

visual magnitude

4.74 (V on UBV Johnson system)

spectral / color information

spectral class	B1ne
B-V-magnitude	-0.05
U-B-magnitude	-0.94
R-I-magnitude

note (category: spectra):

Ultraviolet envelope. Variously classified O9V, B0p, B1IV:e, B1.5Venn, B3ne. Component B, A3V.

variability information

variable star identification

V832 Cyg

note (category: variability):

ADS 14526A, Gamma Cas 4.49 - 4.88V. Expanding circumstellar shell. Marked evidence of mass loss. Shell spectrum faded between 1973 and 1975. Metallic absorption lines disappeared.

double/multiple star system information

number of components of multiple star system	4
separation	20.1 arcsec
mag difference (of double or brightest multiple)	4.4
component ID	AB

note (category: double and multiple data):

AB CPM. B, 9.38V, +0.22(B-V), +0.04(U-B) A8III, vsini 97k/s. Component C, 12v at 26" optical.

miscellaneous information

note (category: group membership):

Cyg OB7.

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

position, motion, parallax:

position (J2000)	RA: 20h 59min 49.553sec	DEC: +47° 31' 15.54''	±0.06 arcsec	source: 15
proper motion (J2000)	RA: 0.0006 arcsec/a	DEC: 0.002 arcsec/a		source: 25
radial velocity	1 km/s			source: 25
galactic coord. (B1950)	longitude: 88.03°	latitude: 0.97°

magnitude:

visual	4.5 (observed)	source: 31
photovisual	4.9	source: 2

spectral information:

spectral class	B0		source: 96
Morgan-Keenan	B1ne		source: 25
B-magnitude	4.66 ±0.05	B-V-magnitude	-0.04
U-magnitude	3.73 ±0.05	U-B-magnitude	-0.93

variability information:

source of data: 30

variability type	264
var. amplitude	0.39

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	0.2 arcsec
position angle	37 °

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
30	GCVS, 4th edition
Kholopov, P.N., et al., General Catalogue of Variable Stars, fourth edition, Moscow: Nauka Publishing House, 1985-88
31	CRM' (non-GCVS variable data)
Warren, W.H. Jr., Northern Hemisphere Catalog of Red Magnitudes, 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: 20h 58min 7.395sec	DEC: +47° 19' 30.08''	±0.004 arcsec
position (J2000)	RA: 20h 59min 49.562sec	DEC: +47° 31' 15.57''
proper motion B1950 (FK4)	RA: 0.0003 arcsec/a	DEC: 0.005 arcsec/a	±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0006 arcsec/a	DEC: 0.002 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	4.9 (accuracy: 2 decimals)
source of visual magnitude data	Taken from the "Henry Draper Catalogue".

spectral information:

spectral class	B0p
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	FK4, catalogue number: 1551
Durchmusterung	BD+46 3133
Boss General Catalogue	29327
Henry Draper Catalogue	200120

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

position and proper motion:

position (J2000)	RA: 20h 59.8min	DEC: +47° 31'
proper motion (J2000)	RA: 0.006 arcsec/a	DEC: 0.002 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
Aa	1981	10	58°	0.2''	4.59	-	B1ne	MCA 65
	1991		37°	-
Aa-B	1831	19	352°	20.2''	4.59	9.43	-	STF2743
Aa-C	1842	10	141°	26.7''	4.59	11.62	-	STF2743
Aa-D	1913	1	220°	38.3''	4.59	11.2	-	STF2743

discoverer information:

discoverer code	discoverer	reference
MCA 65	McAlister, H.A.	-
STF2743	Struve, F.G.W.	-

notes:

note	59 Cyg. A is an irregular variable, V832 Cyg., and interferometer binary. B is BD+46@3134. Proper motion of B +008 +004.

data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)

position:

position (equinox 1950.0)

RA: 20h 58min 7.4sec

DEC: +47° 19' 30''

variability informations:

variability type	GCAS	eruptive variable star
magnitute at max. brightness	4.49
magnitute at min. brightness	4.88
photometric system	visual, photovisual or Johnson's V

spectral information

spectral class

B1.5Venn

references

to a study	Vol. I GCVS (see Kholopov et al. 1985-1988)
to a chart/photograph	no chart is avaible, but the star is contained in the 'Bonner Durchmusterung'

miscanellous

ID in the GCVS catalogue	31/832
constellation	Cygnus
notes on existence	The star is equivalent to '0310833 V0833'.
There are notes in published catalog.

variability type description

variability type	description
GCAS	Eruptive irregular variables of the Gamma Cas type. These are rapidly rotating B III-IVe stars with mass outflow from their equatorial zones. The formation of equatorial rings or disks is often accompanied by temporary fading. Light amplitudes may reach 1.5 mag in V.