Phact


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 (suspected variables)


catalogues and names Phact, a Col, NSV 02549, HR 1956, HD 37795, SAO 196059, FK5: 215, WDS 05396-3404
other names Phaet, Phakt, Phad
constellation Columba

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

note (category: star names): Phaet; Phakt; Phact; Phad.

position, motion, parallax:

position (J2000) RA: 5h 39min 38,9sec DEC: -34 4' 27''
position (J1900) RA: 5h 36min 1,6sec DEC: -34 7' 38''
proper motion (J2000) RA: 0,007 arcsec/a DEC: -0,026 arcsec/a
radial velocity 35 km/s
note: suspected variable radial velocity
rotational velocity 176 km/s (uncertain) (variable)
trigonometric parallax 0,001 arcsec
note (category: radial and/or rotational velocities): Expanding circumstellar shell.

magnitude

visual magnitude 2,64
(V on UBV Johnson system)

spectral / color information

spectral class B7IVe
B-V-magnitude -0,12
U-B-magnitude -0,46
R-I-magnitude -0,09
note (category: colors): Color excess E(B-V) = 0.00.

variability information

variable star identification 2549
note (category: variability): Gamma Cas?, 2.62 - 2.66V. H alpha variable. Rapid variations in H beta profile.

double/multiple star system information

separation 13,5 arcsec
mag difference (of double or brightest multiple) 9,7
note Worley (1978) update of the IDS

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

position, motion, parallax:

position (J2000) RA: 5h 39min 38,947sec DEC: -34 4' 27,01'' 0,06 arcsec source: 15
proper motion (J2000) RA: 0,0005 arcsec/a DEC: -0,026 arcsec/a source: 25
radial velocity 35 km/s source: 25
trigonometric parallax 0,001 - source: 25
galactic coord. (B1950) longitude: 238,81 latitude: -28,86
GCI unit vector (J2000) X: 0,073455 Y: 0,82505 Z: -0,560266

magnitude:

visual 2,64 (observed) source: 25
photovisual 2,8 source: 2
photographic 2,6 source: 2

spectral information:

spectral class B5 source: 96
Morgan-Keenan B7IVe source: 25
B-magnitude 2,52 0,05 B-V-magnitude -0,12
U-magnitude 2,06 0,05 U-B-magnitude -0,46

variability information:

source of data: 28
variability type 264
var. amplitude 0,04

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 13,5 arcsec
magnitude difference between brightest and second brightest component 9,9
position angle 359

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
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 37min 50,211sec DEC: -34 5' 58,73'' 0,007 arcsec
position (J2000) RA: 5h 39min 38,953sec DEC: -34 4' 27,11''
proper motion J1950 (FK4) RA: 0,0001 arcsec/a DEC: -0,027 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0006 arcsec/a DEC: -0,027 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 2,8 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class B5p
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 215
Durchmusterung CD-34 2375
Boss General Catalogue 7078
Henry Draper Catalogue 37795

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

position and proper motion:

position (J2000) RA: 5h 39,6min DEC: -34 4'
proper motion (J2000) RA: 0,007 arcsec/a DEC: -0,026 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
- 1898 5 359 11,4'' 2,64 12,5 B7IVe HDO 193
1950 - 13,5''

discoverer information:

discoverer code discoverer reference
HDO 193 - -

notes:

note Alpha Col.

data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)

position:

position (J1950) RA: 5h 37min 50,2sec DEC: -34 5' 59''

variability informations:

variability type GCAS: eruptive variable star
magnitute at max. brightness 2,62
magnitute at min. brightness 2,66
photometric system visual, photovisual or Johnson's V

spectral information

spectral class BE

references

to a study 0807D (designation: 38G COL)

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.