V0474 Persei

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

position, motion, parallax:

position (J2000)	RA: 2h 22min 21.4sec	DEC: +55° 50' 44''
position (B1900)	RA: 2h 15min 22.8sec	DEC: +55° 23' 17''
proper motion (J2000)	RA: -0.002 arcsec/a	DEC: -0.002 arcsec/a
radial velocity	-15 km/s note: variable radial velocity
rotational velocity	25 km/s (uncertain) (variable)
galactic coordinates	longitude: 135.51°	latitude: -4.79°

note (category: radial and/or rotational velocities):

Var. in period over 200d.

magnitude

visual magnitude

5.17
(V on UBV Johnson system)

spectral / color information

spectral class	A2Ia
B-V-magnitude	0.37
U-B-magnitude	-0.11
R-I-magnitude

note (category: spectra):

Shell star.

variability information

variable star identification

V474 Per

note (category: variability):

Amp. 0.05V. Sp. and H alpha profile var.

double/multiple star system information

separation	11.6 arcsec
mag difference (of double or brightest multiple)	7.8

note (category: double and multiple data):

Fixed.

miscellaneous information

note (category: group membership):

Per OB1.

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

position, motion, parallax:

position (J2000)	RA: 2h 22min 21.429sec	DEC: +55° 50' 45.44''	ą0.43 arcsec	source: 16
proper motion (J2000)	RA: -0.0001 arcsec/a	DEC: 0.017 arcsec/a		source: 25
radial velocity	-15 km/s			source: 25
galactic coord. (B1950)	longitude: 135.51°	latitude: -4.79°

magnitude:

visual	5.17 (observed)	source: 25
photovisual	5.2	source: 2
photographic	5.3	source: 16

spectral information:

spectral class	A2		source: 96
Morgan-Keenan	A2Ia		source: 25
B-magnitude	5.54 ą0.05	B-V-magnitude	0.37
U-magnitude	5.43 ą0.05	U-B-magnitude	-0.11

variability information:

source of data: 27

variability type	133
var. amplitude	0.1

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	11.6 arcsec
magnitude difference between brightest and second brightest component	6
position angle	162 °

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
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
27	Catalog of Red Magnitudes (CRM)
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: 2h 18min 51.207sec	DEC: +55° 37' 5.42''	ą0.018 arcsec
position (J2000)	RA: 2h 22min 21.4sec	DEC: +55° 50' 44.63''
proper motion B1950 (FK4)	RA: -0.0001 arcsec/a	DEC: 0.004 arcsec/a	ą0.003 arcsec/a in RA ą0.002 arcsec/a in DEC
proper motion J2000 (FK5)	RA: -0.0002 arcsec/a	DEC: 0 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	5.2 (accuracy: 2 decimals)
source of visual magnitude data	Taken from Harvard or San Luis photometry.

spectral information:

spectral class	A2p
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

remarks for duplicity and variability

Double star in Aitken's Double Star Catalogue (Aitken 1932)

catalogues

source catalogue	GC, catalogue number: 2836
Durchmusterung	BD+55 598
Boss General Catalogue	2836
Henry Draper Catalogue	14489

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

position and proper motion:

position (J2000)	RA: 2h 22.4min	DEC: +55° 51'
proper motion (J2000)	RA: -0.003 arcsec/a	DEC: -0.004 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
-	1880	8	162°	11.6''	6	12	A2Ia	BU 875

discoverer information:

discoverer code	discoverer	reference
BU 875	Burnham, S.W.	-

notes:

note	9 Per. Variable, V474 Per.

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

position:

position (equinox 1950.0)

RA: 2h 18min 51.2sec

DEC: +55° 37' 5''

variability informations:

variability type	ACYG	pulsating variable star
magnitute at max. brightness	5.15
magnitute at min. brightness	5.25
photometric system	visual, photovisual or Johnson's V

references

to a study	F.Rufener, A.Maeder, G.Burki, AsAp Suppl 31,179,1978.
to a chart/photograph	no chart is avaible, but the star is contained in the 'Bonner Durchmusterung'

miscanellous

ID in the GCVS catalogue	63/474
constellation	Perseus
notes on existence	The star is equivalent to '67039'.

variability type description

variability type	description
ACYG	Variables of the Alpha Cygni type, which are nonradially pulsating supergiants of Bep-AepIa spectral types. The light changes with amplitudes of the order of 0.1 mag often seem irregular, being caused by the superposition of many oscillations with close periods. Cycles from several days to several weeks are observed.

catalogues and names	V0474 Per, 9 Per, HR 685, HD 14489, SAO 23256, BD +55 598, FK5: 2159, WDS 02224+5551
constellation	Perseus