d 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. The Washington Visual Double Star Catalog, 1996.0

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


catalogues and names d Per, del Per, 39 Per, HR 1122, HD 22928, SAO 39053, FK5: 131, WDS 03429+4747
constellation Perseus

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


position, motion, parallax:

position (J2000) RA: 3h 42min 55,5sec DEC: +47 47' 15''
position (J1900) RA: 3h 35min 48,1sec DEC: +47 28' 4''
proper motion (J2000) RA: 0,028 arcsec/a DEC: -0,034 arcsec/a
radial velocity 4 km/s
note: spectroscopic binaries
rotational velocity 259 km/s (uncertain) (variable)
trigonometric parallax 0,016 arcsec

magnitude

visual magnitude 3,01
(V on UBV Johnson system)

spectral / color information

spectral class B5IIIe
B-V-magnitude -0,13
U-B-magnitude -0,51
R-I-magnitude -0,11
note (category: spectra): C1 neutral carbon continuum shows discontinuities in UV. Lyman alpha observed from COPERNICUS.
note (category: colors): Color excess E(B-V) = +0.04.

variability information

variable star identification Del Per
note (category: variability): Alpha CV? 2.98 - 3.03V, about 1d. Strong variable emission at 1650A, CaII?

double/multiple star system information

separation 99,1 arcsec
mag difference (of double or brightest multiple) 7,3
note Worley (1978) update of the IDS

miscellaneous information

note (category: group membership): Per OB3.

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

position, motion, parallax:

position (J2000) RA: 3h 42min 55,497sec DEC: +47 47' 15,3'' 0,06 arcsec source: 15
proper motion (J2000) RA: 0,0028 arcsec/a DEC: -0,034 arcsec/a source: 25
radial velocity 4 km/s source: 25
trigonometric parallax 0,016 0,002 arcsec source: 25
galactic coord. (B1950) longitude: 150,29 latitude: -5,77
GCI unit vector (J2000) X: 0,37832 Y: 0,555246 Z: 0,740659

magnitude:

visual 3,01 (observed) source: 25
photovisual 3,1 source: 2

spectral information:

spectral class B5 source: 96
Morgan-Keenan B5IIIe source: 25
B-magnitude 2,88 0,05 B-V-magnitude -0,13
U-magnitude 2,37 0,05 U-B-magnitude -0,51

variability information:

source of data: 30
variability type 264
var. amplitude 0,05

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 100 arcsec
magnitude difference between brightest and second brightest component 7,4
position angle 313

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
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 39min 21,241sec DEC: +47 37' 46,34'' 0,004 arcsec
position (J2000) RA: 3h 42min 55,49sec DEC: +47 47' 15,21''
proper motion J1950 (FK4) RA: 0,0028 arcsec/a DEC: -0,032 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0027 arcsec/a DEC: -0,035 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 3,1 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class B5
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 131
Durchmusterung BD+47 876
Boss General Catalogue 4427
Henry Draper Catalogue 22928

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

position and proper motion:

position (J2000) RA: 3h 42,9min DEC: +47 47'
proper motion (J2000) RA: 0,028 arcsec/a DEC: -0,034 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
- 1879 3 313 97,4'' 3,01 10,4 B5III BUP 46
1924 - 100''

discoverer information:

discoverer code discoverer reference
BUP 46 - -

notes:

note Delta Per. A possible variable of the Alpha CVn type. Proper motion of B -008 -005.

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

position:

position (J1950) RA: 3h 39min 21sec DEC: +47 37' 48'' 1 sec / 0.1 arcmin

variability informations:

variability type GCAS: eruptive variable star
magnitute at max. brightness 2,99
magnitute at min. brightness 3,04
photometric system visual, photovisual or Johnson's V

spectral information

spectral class B5III

references

to a chart/photograph no chart is avaible, but the star is contained in the 'Bonner Durchmusterung'

miscanellous

ID in the GCVS catalogue 63/9004
constellation Perseus
notes on existence The star is equivalent to '0639005 eps'.
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.