phi Persei

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

position, motion, parallax:

position (J2000)	RA: 1h 43min 39.6sec	DEC: +50° 41' 19''
position (B1900)	RA: 1h 37min 23.3sec	DEC: +50° 11' 6''
proper motion (J2000)	RA: 0.026 arcsec/a	DEC: -0.014 arcsec/a
radial velocity	1 km/s note: spectroscopic binaries, double lined spectra note: orbital data avaible
rotational velocity	450 km/s (uncertain) (variable)
trigonometric parallax	0.025 arcsec
galactic coordinates	longitude: 131.32°	latitude: -11.33°

magnitude

visual magnitude

4.07
(V on UBV Johnson system)

spectral / color information

spectral class	B2Vep
B-V-magnitude	-0.04
U-B-magnitude	-0.93
R-I-magnitude
IR-note	object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

note (category: spectra):

FeII, H in emission. Also classified B0nne, B1III-Vpe.

variability information

variable star identification

Phi Per

note (category: variability):

Gamma Cas 4.03 - 4.11V, 19.5d. Amp. varies in per. 127d. Possible mass loss. Expanding circumstellar shell.

double/multiple star system information

note (category: spectroscopic binaries):

126.696d. Primary, 16.8k/s, V0 -8.4k/s, msin3i 21.1, asini 29.2; secondary K 105.3k/s, sin3i 3.4, asini 184. Unresolved by speckle interferometry. Both components appear to be shell stars, B2Ve and B3Ve. Speculation that secondary is the helium core of a once more massive star whose mass was transferred to the primary.

miscellaneous information

note (category: group membership):

In neutral hydrogen region; Cas-Tau OB1.

note (category: polarization):

Intrinsic polarization, probably due to circumstellar matter.

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

position, motion, parallax:

position (J2000)	RA: 1h 43min 39.639sec	DEC: +50° 41' 19.48''	±0.06 arcsec	source: 15
proper motion (J2000)	RA: 0.0027 arcsec/a	DEC: -0.014 arcsec/a		source: 25
radial velocity	1 km/s			source: 25
trigonometric parallax	0.025 arcsec		±0.002 arcsec	source: 25
galactic coord. (B1950)	longitude: 131.33°	latitude: -11.33°

magnitude:

visual	4 (observed)	source: 31
photovisual	4.2	source: 2

spectral information:

spectral class	B0		source: 96
Morgan-Keenan	B2Vep		source: 25
B-magnitude	4.03 ±0.05	B-V-magnitude	-0.04
U-magnitude	3.1 ±0.05	U-B-magnitude	-0.93

variability information:

source of data: 30

variability type	264
var. amplitude	0.15
var. period	19.5

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
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 40min 30.757sec	DEC: +50° 26' 15.92''	±0.004 arcsec
position (J2000)	RA: 1h 43min 39.645sec	DEC: +50° 41' 19.34''
proper motion B1950 (FK4)	RA: 0.0027 arcsec/a	DEC: -0.011 arcsec/a	±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0028 arcsec/a	DEC: -0.015 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	4.2 (accuracy: 2 decimals)
source of visual magnitude data	Taken from the "Henry Draper Catalogue".

spectral information:

spectral class	B0p
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	FK4, catalogue number: 57
Durchmusterung	BD+49 444
Boss General Catalogue	2102
Henry Draper Catalogue	10516

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

position:

position (equinox 1950.0)

RA: 1h 40min 30.8sec

DEC: +50° 26' 16''

variability informations:

variability type	GCAS	eruptive variable star
magnitute at max. brightness	3.96
magnitute at min. brightness	4.11
photometric system	visual, photovisual or Johnson's V
period [d]	19.5

spectral information

spectral class

B2Vne+B3Vne

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	63/9021
constellation	Perseus
notes on existence	The star is equivalent to '0639023 psi'.
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.

catalogues and names	j Per, phi Per, HR 496, HD 10516, SAO 22554, BD +49 444, FK5: 57
constellation	Perseus