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	Caph, b Cas, bet Cas, 11 Cas, HR 21, HD 432, SAO 21133, BD +58 3, FK5: 2, WDS 00092+5909
other names	Chaph, Kaff, Al Sanam al Nakah
constellation	Cassiopeia

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

note (category: star names):

Caph; Chaph; Kaff; Al Sanam al Nakah.

position, motion, parallax:

position (J2000)	RA: 0h 9min 10.7sec	DEC: +59° 8' 59''
position (B1900)	RA: 0h 3min 50.2sec	DEC: +58° 35' 54''
proper motion (J2000)	RA: 0.525 arcsec/a	DEC: -0.181 arcsec/a
radial velocity	12 km/s note: spectroscopic binaries
rotational velocity	70 km/s (uncertain) (variable)
trigonometric parallax	0.072 arcsec
galactic coordinates	longitude: 117.52°	latitude: -3.27°

magnitude

visual magnitude

2.27 (V on UBV Johnson system)

spectral / color information

spectral class	F2III-IV
B-V-magnitude	0.34
U-B-magnitude	0.11
R-I-magnitude
IR-note	object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

note (category: colors):

Color excess E(B-V) = 0.00.

variability information

variable star identification

Bet Cas

note (category: variability):

Delta Sct, amp. 0.03V, 0.10101d.

double/multiple star system information

separation	31.3 arcsec
mag difference (of double or brightest multiple)	11.3

note (category: spectroscopic binaries):

Optical companion, 27d.

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

position, motion, parallax:

position (J2000)	RA: 0h 9min 10.695sec	DEC: +59° 8' 59.18''	±0.06 arcsec	source: 15
proper motion (J2000)	RA: 0.0683 arcsec/a	DEC: -0.181 arcsec/a		source: 25
radial velocity	12 km/s			source: 25
trigonometric parallax	0.072 arcsec		±0.007 arcsec	source: 25
galactic coord. (B1950)	longitude: 117.53°	latitude: -3.27°

magnitude:

visual	2.2 (observed)	source: 31
photovisual	2.4	source: 2

spectral information:

spectral class	F5		source: 96
Morgan-Keenan	F2III		source: 25
B-magnitude	2.61 ±0.05	B-V-magnitude	0.34
U-magnitude	2.72 ±0.05	U-B-magnitude	0.11

variability information:

source of data: 30

variability type	10
var. amplitude	0.06
var. period	0.1
var. epoch	2438992 19. August 1965, 12:00:00 UT
next max light	2452219.2 5. November 2001, 16:48:00 UT

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	31.3 arcsec
magnitude difference between brightest and second brightest component	11.3
position angle	243 °

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: 0h 6min 29.735sec	DEC: +58° 52' 26.77''	±0.004 arcsec
position (J2000)	RA: 0h 9min 10.719sec	DEC: +59° 8' 58.99''
proper motion B1950 (FK4)	RA: 0.0679 arcsec/a	DEC: -0.177 arcsec/a	±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0686 arcsec/a	DEC: -0.183 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	2.4 (accuracy: 2 decimals)
source of visual magnitude data	Taken from the "Henry Draper Catalogue".

spectral information:

spectral class	F5
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	FK4, catalogue number: 2
Durchmusterung	BD+58 3
Boss General Catalogue	147
Henry Draper Catalogue	432

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

position and proper motion:

position (J2000)	RA: 0h 9.2min	DEC: +59° 9'
proper motion (J2000)	RA: 0.525 arcsec/a	DEC: -0.181 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
-	1889	7	189°	22.6''	2.4	13.7	F2III-IV	AGC 15
	1935		243°	31.3''

discoverer information:

discoverer code	discoverer	reference
AGC 15	-	-

notes:

note	Beta Cas. The primary is a Delta Scuti-type variable. Spectroscopic binary, P = 27 d.

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

position:

position (equinox 1950.0)

RA: 0h 6min 29.7sec

DEC: +58° 52' 27''

variability informations:

variability type	DSCTC	pulsating variable star
magnitute at max. brightness	2.25
magnitute at min. brightness	2.31
photometric system	visual, photovisual or Johnson's V
epoch for maximum light [JD]	2438991.876 19. August 1965, 09:01:26 UT
period [d]	0.1043
next maximum light [JD]	2452219.202 5. November 2001, 16:50:53 UT
rising time	40 % of period

spectral information

spectral class

F2III-IV

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	18/9002
constellation	Cassiopeia
notes on existence	The star is equivalent to '0189003 gam'.
There are notes in published catalog.

variability type description

variability type

description

DSCTC

Variables of the Delta Scuti type. These are pulsating variables of spectral types A0-F5 III-V displaying light amplitudes from 0.003 to 0.9 mag in V (usually several hundredths of a magnitude) and periods from 0.01 to 0.2 days. The shapes of the light curves, periods, and amplitudes usually vary greatly. Radial as well as nonradial pulsations are observed. The variability of some members of this type appears sporadically and sometimes completely ceases, this being a consequence of strong amplitude modulation with the lower value of the amplitude not exceeding 0.001 mag in some cases. The maximum of the surface layer expansion does not lag behind the maximum light for more than 0.1 periods. DSCT stars are representatives of the galactic disk (flat component) and are phenomenologically close to the SX Phe variables. DSCTC Low amplitude group of Delta Sct variables (light amplitude <0.1 mag in V). The majority of this type's representatives are stars of luminosity class V; objects of this subtype generally are representative of the Delta Sct variables in open clusters.