Cih

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

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

catalogues and names Cih, g Cas, gam Cas, 27 Cas, HR 264, HD 5394, SAO 11482, FK5: 32, WDS 00567+6043A
constellation Cassiopeia

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


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

position, motion, parallax:

position (J2000) RA: 0h 56min 42,5sec DEC: +60° 43' 0''
position (J1900) 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

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 -0,08
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 ±0,002 arcsec source: 25
galactic coord. (B1950) longitude: 123,58° latitude: -2,15°
GCI unit vector (J2000) X: 0,474231 Y: 0,119798 Z: 0,872212

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 (J1950) 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 J1950 (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 (J1950) 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.