e Persei

The object was found in the following catalogues:
  1. The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version)

  2. SKY2000 - Master Star Catalog

  3. Smithsonian Astrophysical Observatory Star Catalog

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

catalogues and names e Per, eps Per, 45 Per, HR 1220, HD 24760, SAO 56840, FK5: 147, WDS 03578+4000A
constellation Perseus

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

position, motion, parallax:

position (J2000) RA: 3h 57min 51,2sec DEC: +40 0' 37''
position (J1900) RA: 3h 51min 8,4sec DEC: +39 43' 16''
proper motion (J2000) RA: 0,018 arcsec/a DEC: -0,026 arcsec/a
radial velocity 1 km/s
note: spectroscopic binaries, double lined spectra
rotational velocity 153 km/s (uncertain) (variable)
trigonometric parallax 0,009 arcsec


visual magnitude 2,89
(V on UBV Johnson system)

spectral / color information

spectral class B0.5V+A2V
B-V-magnitude -0,18
U-B-magnitude -0,99
R-I-magnitude -0,18
note (category: colors): Color excess E(B-V) = +0.10.

variability information

variable star identification Eps Per
note (category: variability): Beta C, 2.88 - 3.00V, 0.216:d. Brightest component on visual triple. Photoelectric and spectroscopic resonant periods found are submultiples of 26.9 hrs or 1.12d.

double/multiple star system information

number of components of multiple star system 3
separation 8,8 arcsec
mag difference (of double or brightest multiple) 5,1
component ID AB
note (category: double and multiple data): AB CPM. B, 7.39V, -0.03(B-V), -0.52(U-B), B9.5V, vsini 300:k/s.

miscellaneous information

note (category: group membership): Cas-Tau OB1; member of Pleiades group.

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

position, motion, parallax:

position (J2000) RA: 3h 57min 51,227sec DEC: +40 0' 36,72'' 0,06 arcsec source: 15
proper motion (J2000) RA: 0,0016 arcsec/a DEC: -0,026 arcsec/a source: 25
radial velocity 1 km/s source: 25
trigonometric parallax 0,009 0,001 arcsec source: 25
galactic coord. (B1950) longitude: 157,36 latitude: -10,09
GCI unit vector (J2000) X: 0,38916 Y: 0,659699 Z: 0,642924


visual 2,89 (observed) source: 25
photovisual 3 source: 2

spectral information:

spectral class B1 source: 96
Morgan-Keenan B0.5V+A2V source: 25
B-magnitude 2,69 0,05 B-V-magnitude -0,2
U-magnitude 1,74 0,05 U-B-magnitude -0,95

variability information:

source of data: 27
variability type 140
var. amplitude 0,1

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 8,8 arcsec
magnitude difference between brightest and second brightest component 4,5
position angle 10


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
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 (J1950) RA: 3h 54min 29,432sec DEC: +39 52' 2,54'' 0,004 arcsec
position (J2000) RA: 3h 57min 51,22sec DEC: +40 0' 36,66''
proper motion J1950 (FK4) RA: 0,0015 arcsec/a DEC: -0,024 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0015 arcsec/a DEC: -0,026 arcsec/a
source of proper motion data Determined by source catalog


visual 3 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class B1
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.


source catalogue FK4, catalogue number: 147
Durchmusterung BD+39 895
Boss General Catalogue 4759
Henry Draper Catalogue 24760

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


position (J1950) RA: 3h 54min 29,4sec DEC: +39 52' 3''

variability informations:

variability type BCEP pulsating variable star
magnitute at max. brightness 2,88
magnitute at min. brightness 3
photometric system visual, photovisual or Johnson's V


to a study J.R.Percy, M.Bietenholz, A.Fullerton, IBVS No.2588,1984.
to a chart/photograph no chart is avaible, but the star is contained in the 'Bonner Durchmusterung'


ID in the GCVS catalogue 63/9005
constellation Perseus
notes on existence The star is equivalent to '68098'.

variability type description

variability type description
BCEP Variables of the Beta Cephei type (Beta Cep, Beta CMa), which are pulsating O8-B6 I-V stars with periods of light and radial-velocity variations in the range of 0.1 - 0.6 days and light amplitudes from 0.01 to 0.3 mag in V. The light curves are similar in shape to average radial-velocity curves but lag in phase by a quarter of the period, so that maximum brightness corresponds to
maximum contraction, i.e., to minimum stellar radius. The majority of these stars probably show radial pulsations, but some (V649 Per) display nonradial pulsations; multiperiodicity is characteristic of many of these stars.