UZ Centauri
catalogues and names
| catalogues and names | UZ Cen, HD 101602, SAO 251537, CP -62 2223, WDS 11410-6242 |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 11h 40min 58.513sec | DEC: -62° 41' 32.86'' | ±0.18 arcsec | source: 16 |
| position (2000.72) | RA: 11h 41min 1sec | DEC: -62° 41' 47'' | JD: 2451806.31 | |
| proper motion (J2000) | RA: -0.0017 arcsec/a | DEC: 0.003 arcsec/a | source: 16 | |
| galactic coord. (B1950) | longitude: 294.96° | latitude: -0.92° | ||
magnitude:
| visual | 8.3 (observed) | source: 30 |
| photovisual | 8.5 | source: 16 |
spectral information:
| spectral class | G5 | source: 29 | |
| Morgan-Keenan | F3Ib/II | source: 10 | |
variability information:
| variability type | 114 |
| var. amplitude | 0.82 |
| var. period | 3.33 |
| var. epoch | 2440746 8. June 1970, 12:00:00 UT |
| next max light | 2451808.26 20. September 2000, 18:14:24 UT |
double/multiple star system information:
| separation between brightest and second brightest component | 4 arcsec |
| position angle | 192 ° |
sources:
| 10 | Michigan Catalog of 2-Dimensional Spectral Types for the HD Stars, Volumes I-III |
| Houk, N., and A.P. Cowley, Michigan Catalogue of 2-Dimensional Spectral Types for the HD Stars, Vol. 1., (Zones -89 to -53 Degrees), Ann Arbor: The University of Michigan, 1975, and Houk, N., Michigan Catalogue of 2-Dimensional Spectral Types for the HD Stars, Vol. 2., (Zones -52 to -40 Degrees), Ann Arbor: The University of Michigan, 1978, and Houk, N., Michigan Catalogue of 2-Dimensional Spectral Types for the HD Stars, Vol. 3., (Zones -40 to -26 Degrees), Ann Arbor: The University of Michigan, 1982 | |
| 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 | |
| 29 | SAOJ2000 |
| SAO on FK5 at J2000, 1989 | |
| 30 | GCVS, 4th edition |
| Kholopov, P.N., et al., General Catalogue of Variable Stars, fourth edition, Moscow: Nauka Publishing House, 1985-88 | |
data from Smithsonian Astrophysical Observatory Star Catalog (SAO Staff 1966; USNO, ADC 1990)
position and proper motion:
| position (B1950) | RA: 11h 38min 36.21sec | DEC: -62° 24' 54.24'' | ±0.014 arcsec |
| position (2000.72) | RA: 11h 41min 0sec | DEC: -62° 41' 46'' | JD: 2451806.31 |
| position (J2000) | RA: 11h 40min 58.54sec | DEC: -62° 41' 32.55'' | |
| proper motion B1950 (FK4) | RA: -0.0007 arcsec/a | DEC: 0.002 arcsec/a | ±0.007 arcsec/a in RA ±0.007 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0013 arcsec/a | DEC: 0.007 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
spectral information:
| spectral class | G5 |
| 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 | Cape Annals 20, catalogue number: 3303 |
| Durchmusterung | CP-62 2223 |
| Henry Draper Catalogue | 101602 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 11h 41min | DEC: -62° 42' |
| proper motion (J2000) | RA: -0.01 arcsec/a | DEC: 0.006 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 |
| - | 1927 | 4 | 192° | 4'' | - | 13.5 | F3Ib/II | B 799 |
discoverer information:
| discoverer code | discoverer | reference |
| B 799 | Bos, W.H. van den | - |
notes:
| note | A is the Cepheid UZ Cen. |
data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 11h 38min 36.2sec | DEC: -62° 24' 54'' |
variability informations:
| variability type | CEP(B) | pulsating variable star |
| magnitute at max. brightness | 8.3 | |
| magnitute at min. brightness | 9.12 | |
| photometric system | visual, photovisual or Johnson's V | |
| epoch for maximum light [JD] | 2440746.1 8. June 1970, 14:24:00 UT |
|
| period [d] | 3.33434 | |
| next maximum light [JD] | 2451809.44012 21. September 2000, 22:33:46 UT |
|
| rising time | 27 % of period |
spectral information
| spectral class | F3Ib/II |
references
| to a study | Vol. I GCVS (see Kholopov et al. 1985-1988) |
| to a chart/photograph | no chart is avaible, but the star is contained in the 'Cordoba Durchmusterung' |
miscanellous
| ID in the GCVS catalogue | 19/39 |
| constellation | Centaurus |
| notes on existence | The star is equivalent to '0190040 VV'. |
| There are notes in published catalog. | |
variability type description
| variability type | description |
| CEP(B) | Cepheids. Radially pulsating, high luminosity (classes Ib-II) variables with periods in the range of 1-135 days and amplitudes from several hundredths to 2 mag in V (in the B band, the amplitudes are greater). Spectral type at maximum light is F; at minimum, the types are G-K. The longer the period of light variation,the later is the spectral type. The maximum of the surface-layer expansion velocity almost coinciding with maximum light. CEP(B) Cepheids (TU Cas, V 367 Sct) displaying the presence of two or more simultaneously operating pulsation modes (usually the fundamental tone with the period P0 and the first overtone P1). The periods P0 are in the range from 2 to 7 days, with the ratio P1/P0 approx. 0.71. |