b Doradus


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 b Dor, bet Dor, HR 1922, HD 37350, SAO 249311, FK5: 212
constellation Dorado

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


position, motion, parallax:

position (J2000) RA: 5h 33min 37,5sec DEC: -62 29' 23''
position (J1900) RA: 5h 32min 45,4sec DEC: -62 33' 19''
proper motion (J2000) RA: 0,002 arcsec/a DEC: 0,009 arcsec/a
radial velocity 7 km/s
note: variable radial velocity
rotational velocity 0 km/s (uncertain) (variable)
trigonometric parallax 0,012 arcsec
note (category: radial and/or rotational velocities): Same period, originally considered SB in 1924; later identified as pulsating.

magnitude

visual magnitude 3,76
(V on UBV Johnson system)

spectral / color information

spectral class F6Ia
B-V-magnitude 0,82
U-B-magnitude 0,55
R-I-magnitude 0,43
note (category: spectra): Also classified F4-G4Ia-II.

variability information

variable star identification Bet Dor
note (category: variability): CDelta 3.46 - 4.08V, 9.84200d. Period varies.

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

position, motion, parallax:

position (J2000) RA: 5h 33min 37,514sec DEC: -62 29' 23,48'' 0,06 arcsec source: 15
proper motion (J2000) RA: 0,0003 arcsec/a DEC: 0,009 arcsec/a source: 25
radial velocity 7 km/s source: 25
trigonometric parallax 0,012 0,001 arcsec source: 25
galactic coord. (B1950) longitude: 271,73 latitude: -32,77
GCI unit vector (J2000) X: 0,05304 Y: 0,45885 Z: -0,886929

magnitude:

visual 3,46 (observed) source: 30
photovisual 3,8 source: 2
photographic 4,2 source: 2

spectral information:

spectral class F5 source: 96
Morgan-Keenan F6Ia source: 25
B-magnitude 4,58 0,05 B-V-magnitude 0,82
U-magnitude 5,13 0,05 U-B-magnitude 0,55

variability information:

source of data: 30
variability type 111
var. amplitude 0,62
var. period 9,84
var. epoch 2440905
14. November 1970, 12:00:00 UT
next max light 2451620,76
17. March 2000, 06:14:24 UT

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
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: 5h 33min 11,331sec DEC: -62 31' 20,2'' 0,011 arcsec
position (J2000) RA: 5h 33min 37,513sec DEC: -62 29' 23,65''
proper motion J1950 (FK4) RA: 0,0002 arcsec/a DEC: 0,007 arcsec/a 0,003 arcsec/a in RA
0,002 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0003 arcsec/a DEC: 0,007 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 3,8 (accuracy: 2 decimals)
source of visual magnitude data Arithmetic mean of maximum and minimum magnitudes of a variable star

spectral information:

spectral class F5p
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

remarks for duplicity and variability

Variable star in visual magnitude in source catalog

catalogues

source catalogue FK4, catalogue number: 212
Durchmusterung CP-62 487
Boss General Catalogue 6944
Henry Draper Catalogue 37350

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

position:

position (J1950) RA: 5h 33min 11,3sec DEC: -62 31' 20''

variability informations:

variability type DCEP pulsating variable star
magnitute at max. brightness 3,46
magnitute at min. brightness 4,08
photometric system visual, photovisual or Johnson's V
epoch for maximum light [JD] 2440905,3
14. November 1970, 19:12:00 UT
period [d] 9,8426
next maximum light [JD] 2451623,8914
20. March 2000, 09:23:37 UT
rising time 48 % of period

spectral information

spectral class F4-G4Ia-II

references

to a study Vol. I GCVS (see Kholopov et al. 1985-1988)
to a chart/photograph Vol. I GCVS (see Kholopov et al. 1985-1988)

miscanellous

ID in the GCVS catalogue 33/9002
constellation Dorado
notes on existence The star is equivalent to '0339003 gam'.
There are notes in published catalog.

variability type description

variability type description
DCEP These are the classical cepheids, or Delta Cep-type variables. Comparatively young objects that have left the main sequence and evolved into the instability strip of the Hertzsprung-Russell (H-R) diagram, they obey the well-known Cepheid period-luminosity relation and belong to the young disk population. DCEP stars are present in open clusters. They display a certain relation between the shapes of their light curves and their periods.