z Phoenicis
| 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 | |
magnitude
| 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 | |
magnitude:
| 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:
| 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:
| separation between brightest and second brightest component | 0,9 arcsec |
| magnitude difference between brightest and second brightest component | 2,8 |
| position angle | 79 ° |
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 | |
| 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 | ||
magnitude:
| 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) |
catalogues
| 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 | - | - |
notes:
| 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:
| 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 |
references
| to a study | Vol. II GCVS |
| to a chart/photograph | Vol. I GCVS (see Kholopov et al. 1985-1988) |
miscanellous
| 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. EA 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. EB 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. EW 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. |