Zuben Elschemali
| catalogues and names | Zuben Elschemali, b Lib, NSV 07009, 27 Lib, HR 5685, HD 135742, SAO 140430, FK5: 564 |
| other names | Zuben Eschamali, Zuben el Chamali, Zubenesch, Zubenelg, Kiffa Borealis |
| constellation | Libra |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
| note (category: star names): | Zuben Elschemali; Zuben Eschamali; Zuben el Chamali; Zubenesch; Zubenelg; Kiffa Borealis. |
position, motion, parallax:
| position (J2000) | RA: 15h 17min 0,4sec | DEC: -9° 22' 59'' |
| position (J1900) | RA: 15h 11min 37,4sec | DEC: -9° 0' 50'' |
| proper motion (J2000) | RA: -0,096 arcsec/a | DEC: -0,019 arcsec/a |
| radial velocity | -35 km/s note: spectroscopic binaries |
|
| rotational velocity | 230 km/s (uncertain) (variable) | |
| trigonometric parallax | -0,003 arcsec | |
magnitude
| visual magnitude | 2,61 (V on UBV Johnson system) |
spectral / color information
| spectral class | B8V |
| B-V-magnitude | -0,11 |
| U-B-magnitude | -0,36 |
| R-I-magnitude | -0,1 |
| note (category: spectra): | C1 neutral carbon continuum shows discontinuities in UV. |
| note (category: colors): | Color excess E(B-V) = -0.02. |
variability information
| variable star identification | 7009 |
| note (category: variability): | Described by Eratosthenes (ca. 200 B.C.) as brighter than Antares, by Ptolemy (ca. 150 A.D.) as equal to Antares. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 15h 17min 0,421sec | DEC: -9° 22' 58,54'' | ±0,06 arcsec | source: 15 |
| proper motion (J2000) | RA: -0,0065 arcsec/a | DEC: -0,019 arcsec/a | source: 25 | |
| radial velocity | -35 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 352,03° | latitude: 39,23° | ||
| GCI unit vector (J2000) | X: -0,644003 | Y: -0,747449 | Z: -0,163032 | |
magnitude:
| visual | 2,61 (observed) | source: 25 |
| photovisual | 2,7 | source: 2 |
| photographic | 2,7 | source: 2 |
spectral information:
| spectral class | B8 | source: 96 | |
| Morgan-Keenan | B8V | source: 25 | |
| B-magnitude | 2,5 ±0,05 | B-V-magnitude | -0,11 |
| U-magnitude | 2,14 ±0,05 | U-B-magnitude | -0,36 |
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 | |
| 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: 15h 14min 18,732sec | DEC: -9° 11' 58,93'' | ±0,003 arcsec |
| position (J2000) | RA: 15h 17min 0,43sec | DEC: -9° 22' 58,53'' | |
| proper motion J1950 (FK4) | RA: -0,0066 arcsec/a | DEC: -0,023 arcsec/a | ±0,001 arcsec/a in RA ±0,001 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0,0064 arcsec/a | DEC: -0,019 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 2,7 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
| spectral class | B8 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | FK4, catalogue number: 564 |
| Durchmusterung | BD-08 3935 |
| Boss General Catalogue | 20539 |
| Henry Draper Catalogue | 135742 |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (J1950) | RA: 15h 14min 18,7sec | DEC: -9° 11' 59'' |
variability informations:
| magnitute at max. brightness | 2,6 |
| magnitute at min. brightness | 2,63 |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | B8 |
references
| to a study | 731201D (designation: HD 135742) |