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	Cih, g Cas, gam Cas, 27 Cas, HR 264, HD 5394, SAO 11482, BD +59 144, FK5: 32, WDS 00567+6043A
constellation	Cassiopeia

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

position, motion, parallax:

position (J2000)	RA: 0h 56min 42.5sec	DEC: +60° 43' 0''
position (B1900)	RA: 0h 50min 40.1sec	DEC: +60° 10' 31''
proper motion (J2000)	RA: 0.026 arcsec/a	DEC: -0.005 arcsec/a
radial velocity	-7 km/s note: spectroscopic binaries
rotational velocity	300 km/s
trigonometric parallax	0.016 arcsec
galactic coordinates	longitude: 123.58°	latitude: -2.15°

magnitude

visual magnitude

2.47 (V on UBV Johnson system)

spectral / color information

spectral class	B0IVe
B-V-magnitude	-0.15
U-B-magnitude	-1.08
R-I-magnitude
IR-note	object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

note (category: spectra):

First emission-line star discovered, by Angelo Secchi in 1866. IRAS satellite observations confirm IR excess and yield blackbody temperature of about 6750K.

note (category: colors):

IR excess.

variability information

variable star identification

Gam Cas

note (category: variability):

ADS 782A, Gamma Cas 1.6 - 3.0v. Spectrum and color vary. Expanding circumstellar shell. High-velocity variable mass loss. Variable hydrogen emission, 0.7d. Variable SiIV, CIV, polarization. Variable X-ray source. H alpha indicates rotating disk-like envelope.

double/multiple star system information

number of components of multiple star system	3
separation	2.3 arcsec
mag difference (of double or brightest multiple)	6.3
component ID	AB

note (category: double and multiple data):

AB CPM.

miscellaneous information

note (category: group membership):

Cas-Tau OB1; exciting star of HII region S185; in reflection nebula; two peculiar elephant trunks of very different colors: IC 59 and IC 63.

note (category: miscellaneous):

IRAS observations confirm IR excess and yield simple blackbody temperature of 6750 +/- 100K.

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

position, motion, parallax:

position (J2000)	RA: 0h 56min 42.525sec	DEC: +60° 43' 0.19''	±0.06 arcsec	source: 15
proper motion (J2000)	RA: 0.0035 arcsec/a	DEC: -0.005 arcsec/a		source: 25
radial velocity	-7 km/s			source: 25
trigonometric parallax	0.016 arcsec		±0.002 arcsec	source: 25
galactic coord. (B1950)	longitude: 123.58°	latitude: -2.15°

magnitude:

visual	2.47 (observed)	source: 25
photovisual	2.3	source: 2

spectral information:

spectral class	B0		source: 96
Morgan-Keenan	B0IVnpe(shell)		source: 25
B-magnitude	2.32 ±0.05	B-V-magnitude	-0.15
U-magnitude	1.24 ±0.05	U-B-magnitude	-1.08

variability information:

source of data: 30

variability type	264
var. amplitude	1.4

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	2.2 arcsec
magnitude difference between brightest and second brightest component	8.7
position angle	252 °

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
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: 0h 53min 40.324sec	DEC: +60° 26' 47.38''	±0.003 arcsec
position (J2000)	RA: 0h 56min 42.514sec	DEC: +60° 43' 0.1''
proper motion B1950 (FK4)	RA: 0.0034 arcsec/a	DEC: 0 arcsec/a	±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0035 arcsec/a	DEC: -0.006 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	2.8 (accuracy: 2 decimals)
source of visual magnitude data	Arithmetic mean of maximum and minimum magnitudes of a variable star

spectral information:

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

remarks for duplicity and variability

Variable star in visual magnitude in source catalog

catalogues

source catalogue	FK4, catalogue number: 32
Durchmusterung	BD+59 144
Boss General Catalogue	1117
Henry Draper Catalogue	5394

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

position and proper motion:

position (J2000)	RA: 0h 56.7min	DEC: +60° 43'
proper motion (J2000)	RA: 0.026 arcsec/a	DEC: -0.005 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
AB	1888	42	256°	2.2''	2.2	10.9	B0IVe	BU 1028
	1961		252°	-
AC	1878	12	349°	52.3''	2.2	12.9	-	BU 499
	1959		347°	52.7''

discoverer information:

discoverer code	discoverer	reference
BU 1028	Burnham, S.W.	-
BU 499	Burnham, S.W.	-

notes:

note	Gamma Cas. A is a nova-like variable.

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

position:

position (equinox 1950.0)

RA: 0h 53min 40.3sec

DEC: +60° 26' 47''

variability informations:

variability type	GCAS	eruptive variable star
magnitute at max. brightness	1.6
magnitute at min. brightness	3
photometric system	visual, photovisual or Johnson's V

spectral information

spectral class

B0.5IVpe

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	18/9003
constellation	Cassiopeia
notes on existence	The star is equivalent to '0189004 del'.
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.