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	Ruchbah, d Cas, del Cas, 37 Cas, HR 403, HD 8538, SAO 22268, BD +59 248, FK5: 48, WDS 01258+6014
other names	Rucba, Rucha, Ksora in Becvar
constellation	Cassiopeia

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

note (category: star names):

Ruchbah; Rucba; Rucha; also Ksora in Becvar.

position, motion, parallax:

position (J2000)	RA: 1h 25min 49sec	DEC: +60° 14' 7''
position (2000.73)	RA: 1h 25min 52sec	DEC: +60° 14' 21''
position (B1900)	RA: 1h 19min 16.1sec	DEC: +59° 42' 56''
proper motion (J2000)	RA: 0.297 arcsec/a	DEC: -0.051 arcsec/a
radial velocity	7 km/s note: spectroscopic binaries
rotational velocity	113 km/s (uncertain) (variable)
trigonometric parallax	0.037 arcsec
galactic coordinates	longitude: 127.19°	latitude: -2.35°

magnitude

visual magnitude

2.68 (V on UBV Johnson system)

spectral / color information

spectral class	A5III-IV
B-V-magnitude	0.13
U-B-magnitude	0.12
R-I-magnitude
IR-note	object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

note (category: spectra):

Also classified A5V.

note (category: colors):

Color excess E(B-V) = +0.27.

variability information

variable star identification

Del Cas

note (category: variability):

EA? 2.68 - 2.76V, 759d.

double/multiple star system information

separation	131.7 arcsec
mag difference (of double or brightest multiple)	8.7
note	Worley (1978) update of the IDS

note (category: double and multiple data):

Unresolved by speckle interferometry 1981.69.

miscellaneous information

note (category: group membership):

Hyades group.

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

position, motion, parallax:

position (J2000)	RA: 1h 25min 48.959sec	DEC: +60° 14' 6.96''	±0.06 arcsec	source: 15
position (2000.73)	RA: 1h 25min 52sec	DEC: +60° 14' 21''	JD: 2451810.11
proper motion (J2000)	RA: 0.0399 arcsec/a	DEC: -0.051 arcsec/a		source: 25
radial velocity	7 km/s			source: 25
trigonometric parallax	0.037 arcsec		±0.004 arcsec	source: 25
galactic coord. (B1950)	longitude: 127.19°	latitude: -2.35°

magnitude:

visual	2.674 (observed)	source: 31
photovisual	2.8	source: 2

spectral information:

spectral class	A5		source: 96
Morgan-Keenan	A5IV		source: 25
B-magnitude	2.81 ±0.05	B-V-magnitude	0.13
U-magnitude	2.93 ±0.05	U-B-magnitude	0.12

variability information:

source of data: 30

variability type	310
var. amplitude	0.08
var. period	759
var. epoch	2420161 28. January 1914, 12:00:00 UT
next max light	2452039 9. May 2001, 12:00:00 UT

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	131.7 arcsec
magnitude difference between brightest and second brightest component	8.8
position angle	66 °

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: 1h 22min 31.498sec	DEC: +59° 58' 34.36''	±0.003 arcsec
position (2000.73)	RA: 1h 25min 49sec	DEC: +60° 14' 23''	JD: 2451810.11
position (J2000)	RA: 1h 25min 48.986sec	DEC: +60° 14' 6.91''
proper motion B1950 (FK4)	RA: 0.04 arcsec/a	DEC: -0.045 arcsec/a	±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0403 arcsec/a	DEC: -0.052 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	A5
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	FK4, catalogue number: 48
Durchmusterung	BD+59 248
Boss General Catalogue	1715
Henry Draper Catalogue	8538

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

position and proper motion:

position (J2000)	RA: 1h 25.8min	DEC: +60° 14'
proper motion (J2000)	RA: 0.297 arcsec/a	DEC: -0.051 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
-	1909	2	67°	136''	2.68	11.5	A5III-IVv	BUP 19
	1925		66°	131.7''

discoverer information:

discoverer code	discoverer	reference
BUP 19	-	-

notes:

note	Delta Cas. A spectroscopic and (perhaps) eclipsing binary.

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

position:

position (equinox 1950.0)

RA: 1h 22min 31.5sec

DEC: +59° 58' 34''

variability informations:

variability type	EA:	close binary eclipsing system
magnitute at max. brightness	2.68
magnitute at min. brightness	2.76
photometric system	visual, photovisual or Johnson's V
epoch for maximum light [JD]	2420161 28. January 1914, 12:00:00 UT
period [d]	759
next maximum light [JD]	2452039 9. May 2001, 12:00:00 UT

spectral information

spectral class

A5V

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	18/9004
constellation	Cassiopeia
notes on existence	The star is equivalent to '0189009 iot'.
There are notes in published catalog.

variability type description

variability type

description

EA

Eclipsing binary systems. These are binary systems with orbital planes so close to the observer's line of sight (the inclination i of the orbital plane to the plane orthogonal to the line of sight is close to 90 deg) that the components periodically eclipse each other. Consequently, the observer finds changes of the apparent combined brightness of the system with the period coincident with that of the components' orbital motion. EA Algol (Beta Persei)-type eclipsing systems. Binaries with spherical or slightly ellipsoidal components. It is possible to specify, for their light curves, the moments of the beginning and end of the eclipses. Between eclipses the light remains almost constant or varies insignificantly because of reflection effects, slight ellipsoidality of components, or physical variations. Secondary minima may be absent. An extremely wide range of periods is observed, from 0.2 to >= 10000 days. Light amplitudes are also quite different and may reach several magnitudes. EB Beta Lyrae-type eclipsing systems. These are eclipsing systems having ellipsoidal components and light curves for which it is impossible to specify the exact times of onset and end of eclipses because of a continuous change of a system's apparent combined brightness between eclipses; secondary minimum is observed in all cases, its depth usually being considerably smaller than that of the primary minimum; periods are mainly longer than 1 day. The components generally belong to early spectral types (B-A). Light amplitudes are usually <2 mag in V. EW W Ursae Majoris-type eclipsing variables. These are eclipsers with periods shorter than 1 days, consisting of ellipsoidal components almost in contact and having light curves for which it is impossible to specify the exact times of onset and end of eclipses. The depths of the primary and secondary minima are almost equal or differ insignificantly. Light amplitudes are usually <0.8 mag in V. The components generally belong to spectral types F-G and later.