catalogues and names

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

SKY2000 - Master Star Catalog

Smithsonian Astrophysical Observatory Star Catalog

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

catalogues and names

catalogues and names

V0526 Cas, HR 238, HD 4818, SAO 21767, BD +50 161

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

position, motion, parallax:

position (J2000)	RA: 0h 50min 57.4sec	DEC: +51° 30' 29''
position (B1900)	RA: 0h 45min 13.9sec	DEC: +50° 57' 48''
proper motion (J2000)	RA: 0.135 arcsec/a	DEC: -0.003 arcsec/a
radial velocity	2 km/s note: suspected variable radial velocity
galactic coordinates	longitude: 122.85°	latitude: -11.36°

magnitude

visual magnitude

6.39 (V on UBV Johnson system)

spectral / color information

spectral class	F2IV
B-V-magnitude	0.28
U-B-magnitude	0.12

note (category: spectra):

Also classified F5III.

variability information

variable star identification

V526 Cas

note (category: variability):

Delta Sct 6.34 - 6.37V, 0.1360d; sinusoidal components 0.0526 and 0.0396d.

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

position, motion, parallax:

position (J2000)	RA: 0h 50min 57.38sec	DEC: +51° 30' 28.98''	±0.43 arcsec	source: 16
proper motion (J2000)	RA: 0.0149 arcsec/a	DEC: 0.001 arcsec/a		source: 25
radial velocity	2 km/s			source: 25
galactic coord. (B1950)	longitude: 122.86°	latitude: -11.36°

magnitude:

visual	6.37 (observed)	source: 25
photovisual	6.5	source: 2
photographic	6.6	source: 16

spectral information:

spectral class	A5		source: 96
Morgan-Keenan	F2IV		source: 25
B-magnitude	6.66 ±0.05	B-V-magnitude	0.29
U-magnitude	6.77 ±0.05	U-B-magnitude	0.11

variability information:

source of data: 30

variability type	10
var. amplitude	0.03

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
16	PPM North and PPM South Catalogs and PPM Supplement
Roser, S., and U. Bastian, "Catalogue of Positions and Proper Motions," A&AS, Vol. 74, p. 449, 1988, and Bastian, U., et al., "Catalogue of Positions and Proper Motions - South," 1993
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 48min 4.96sec	DEC: +51° 14' 10.07''	±0.028 arcsec
position (J2000)	RA: 0h 50min 57.366sec	DEC: +51° 30' 28.61''
proper motion B1950 (FK4)	RA: 0.0143 arcsec/a	DEC: 0.002 arcsec/a	±0.005 arcsec/a in RA ±0.004 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0145 arcsec/a	DEC: -0.003 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	6.5 (accuracy: 2 decimals)
source of visual magnitude data	Taken from Harvard or San Luis photometry.

spectral information:

spectral class	A5
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	GC, catalogue number: 1013
Durchmusterung	BD+50 161
Boss General Catalogue	1013
Henry Draper Catalogue	4818

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

position:

position (equinox 1950.0)

RA: 0h 48min 5sec

DEC: +51° 14' 10''

variability informations:

variability type	DSCTC	pulsating variable star
magnitute at max. brightness	6.34
magnitute at min. brightness	6.37
photometric system	visual, photovisual or Johnson's V

spectral information

spectral class

F5III

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	18/526
constellation	Cassiopeia
notes on existence	The star is equivalent to '0180527 V0527'.
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.