z Phoenicis

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 z Phe, zet Phe, HR 338, HD 6882, SAO 232306, WDS 01084-5515A
constellation Phoenix

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

position, motion, parallax:

position (J2000) RA: 1h 8min 23,1sec DEC: -55 14' 45''
position (J1900) RA: 1h 4min 10,9sec DEC: -55 46' 49''
proper motion (J2000) RA: 0,019 arcsec/a DEC: 0,025 arcsec/a
radial velocity 15 km/s
note: spectroscopic binaries, double lined spectra
note: orbital data avaible
rotational velocity 127 km/s (uncertain) (variable)
dynamical parallax 0,013 arcsec


visual magnitude 3,92
(V on UBV Johnson system)

spectral / color information

spectral class B6V+B9V
B-V-magnitude -0,08
U-B-magnitude -0,41
R-I-magnitude -0,12
note (category: spectra): Phosphorus in spectrum.

variability information

variable star identification Zet Phe
note (category: variability): Primary component of visual system. EA 3.92 - 4.42V, 1.6697664d, i 84.7d.

double/multiple star system information

number of components of multiple star system 3
separation 6,6 arcsec
mag difference (of double or brightest multiple) 4
component ID ABxC
note Worley (1978) update of the IDS
note (category: double and multiple data): AB 4.2, 7.0v close binary; vsini of B 87k/s. C, 7.0 F7V at 6.6" CPM.
note (category: spectroscopic binaries): 1.6698d, K 130.6k/s, V0 +19.6k/s, msin3i 3.83, asini 3.00. Rotation apsides 32.5y. Secondary of SB, vsini 68k/s.

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

position, motion, parallax:

position (J2000) RA: 1h 8min 22,981sec DEC: -55 14' 45,66'' 0,19 arcsec source: 16
proper motion (J2000) RA: 0,0001 arcsec/a DEC: 0,008 arcsec/a source: 25
radial velocity 15 km/s source: 25
galactic coord. (B1950) longitude: 297,83 latitude: -61,71
GCI unit vector (J2000) X: 0,544866 Y: 0,167578 Z: -0,821607


visual 3,91 (observed) source: 30
photovisual 4,1 source: 2
photographic 4,1 source: 2

spectral information:

spectral class B8 source: 96
Morgan-Keenan B6V+B9V source: 25
B-magnitude 3,84 0,05 B-V-magnitude -0,08
U-magnitude 3,43 0,05 U-B-magnitude -0,41

variability information:

source of data: 30
variability type 10
var. amplitude 0,51
var. period 1,67
var. epoch 2441644
22. November 1972, 12:00:00 UT
next max light 2451622,25
18. March 2000, 18:00:00 UT

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 0,9 arcsec
magnitude difference between brightest and second brightest component 2,8
position angle 79


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
16 PPM North and PPM South Catalogs and PPM Supplement
Roser, S., and U. Bastian, "Catalogue of Positions and Proper Motions," A&AS, Vol. 74, p. 449, 1988, and Bastian, U., et al., "Catalogue of Positions and Proper Motions - South," 1993
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: 1h 6min 17,251sec DEC: -55 30' 45,72'' 0,019 arcsec
position (J2000) RA: 1h 8min 23,088sec DEC: -55 14' 44,86''
proper motion J1950 (FK4) RA: 0,0024 arcsec/a DEC: 0,031 arcsec/a 0,004 arcsec/a in RA
0,004 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0023 arcsec/a DEC: 0,025 arcsec/a
source of proper motion data Determined by source catalog


visual 4,1 (accuracy: 2 decimals)
source of visual magnitude data Taken from Harvard or San Luis photometry.

spectral information:

spectral class B8
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

remarks for duplicity and variability

Double star in Aitken's Double Star Catalogue (Aitken 1932)


source catalogue GC, catalogue number: 1387
Durchmusterung CP-55 241
Boss General Catalogue 1387
Henry Draper Catalogue 6882

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

position and proper motion:

position (J2000) RA: 1h 8,4min DEC: -55 15'
proper motion (J2000) RA: 0,01 arcsec/a DEC: 0,016 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
AB 1931 8 22 0,6'' 4,2 7 B6V+B9V RST1205
1987 79 0,9''
AB-C 1835 27 243 6,4'' 4,1 7 B6V+B9V RMK 2
1991 241 -

discoverer information:

discoverer code discoverer reference
RST1205 Rossiter, R.A. -
RMK 2 - -


note Zeta Phe. A is an Algol-type system, spectrum com- posite, P = 1.67d. Both B and C are probably physical.

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


position (J1950) RA: 1h 6min 17,3sec DEC: -55 30' 46''

variability informations:

variability type EA/DM close binary eclipsing system
magnitute at max. brightness 3,91
magnitute at min. brightness 4,42
photometric system visual, photovisual or Johnson's V
epoch for maximum light [JD] 2441643,689
22. November 1972, 04:32:10 UT
period [d] 1,6697671
next maximum light [JD] 2451622,2171896
18. March 2000, 17:12:45 UT
duration of the eclipse 12 % of period
the duration of the light constancy phase at minimum light is equal to zero

spectral information

spectral class B6V+B9V


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


ID in the GCVS catalogue 64/9006
constellation Phoenix
notes on existence The star is equivalent to '0649009 iot'.
There are notes in published catalog.

variability type description

variability type description
EA Eclipsing binary systems. These are binary systems with orbital planes so close to the observer's line of sight (the inclination i of the orbital plane to the plane orthogonal to the line of sight is close to 90 deg) that the components periodically eclipse each other.
Consequently, the observer finds changes of the apparent combined brightness of the system with the period coincident with that of the components' orbital motion.

Algol (Beta Persei)-type eclipsing systems. Binaries with spherical or slightly ellipsoidal components. It is possible to specify, for their light curves, the moments of the beginning and end of the eclipses. Between eclipses the light remains almost constant or varies insignificantly because of reflection effects, slight ellipsoidality of components, or physical variations. Secondary minima may be absent. An extremely wide range of periods is observed, from 0.2 to >= 10000 days. Light amplitudes are also quite different and may reach several magnitudes.

Beta Lyrae-type eclipsing systems. These are eclipsing systems having ellipsoidal components and light curves for which it is impossible to specify the exact times of onset and end of eclipses because of a continuous change of a system's apparent combined brightness between eclipses; secondary minimum is observed in all cases, its depth usually being considerably smaller than that of the primary minimum; periods are mainly longer than 1 day. The components
generally belong to early spectral types (B-A). Light amplitudes are usually <2 mag in V.

W Ursae Majoris-type eclipsing variables. These are eclipsers with periods shorter than 1 days, consisting of ellipsoidal components almost in contact and having light curves for which it is impossible to specify the exact times of onset and end of eclipses. The depths of the primary and secondary minima are almost equal or differ insignificantly. Light amplitudes are usually <0.8 mag in V. The components generally belong to spectral types F-G and later.
DM Detached main-sequence systems. Both components are main-sequence stars and do not fill their inner Roche lobes.