t1Lupi
catalogues and names
| catalogues and names | t1Lup, tau 1 Lup, HR 5395, HD 126341, SAO 224919, CD -44 9322, FK5: 1377, WDS 14261-4513A |
| constellation | Lupus |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 14h 26min 8.2sec | DEC: -45° 13' 17'' | ||
| position (2000.72) | RA: 14h 26min 11sec | DEC: -45° 13' 29'' | ||
| position (B1900) | RA: 14h 19min 42.9sec | DEC: -44° 46' 9'' | ||
| proper motion (J2000) | RA: -0.012 arcsec/a | DEC: -0.013 arcsec/a | ||
| radial velocity | -22 km/s | |||
| rotational velocity | 30 km/s (uncertain) (variable) | |||
| galactic coordinates | longitude: 319.92° | latitude: 14.5° | ||
magnitude
| visual magnitude | 4.56 (V on UBV Johnson system) |
spectral / color information
| spectral class | B2IV |
| B-V-magnitude | -0.15 |
| U-B-magnitude | -0.79 |
| R-I-magnitude |
variability information
| variable star identification | Tau1 Lup |
| note (category: variability): | Beta C 4.54 - 4.58V, 4.36 - 4.43B, 4.10 - 4.14p, 0.17738884d. |
double/multiple star system information
| separation | 158.2 arcsec |
| mag difference (of double or brightest multiple) | 4.7 |
| note | Worley (1978) update of the IDS |
miscellaneous information
| note (category: group membership): | Sco-Cen assoc. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 14h 26min 8.23sec | DEC: -45° 13' 17.18'' | ±0.06 arcsec | source: 15 |
| position (2000.72) | RA: 14h 26min 11sec | DEC: -45° 13' 29'' | JD: 2451809.23 | |
| proper motion (J2000) | RA: -0.0012 arcsec/a | DEC: -0.013 arcsec/a | source: 25 | |
| radial velocity | -22 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 319.92° | latitude: 14.5° | ||
magnitude:
| visual | 4.56 (observed) | source: 25 |
| photovisual | 4.7 | source: 2 |
| photographic | 4.5 | source: 2 |
spectral information:
| spectral class | B3 | source: 96 | |
| Morgan-Keenan | B2IV | source: 25 | |
| B-magnitude | 4.41 ±0.05 | B-V-magnitude | -0.15 |
| U-magnitude | 3.62 ±0.05 | U-B-magnitude | -0.79 |
variability information:
| variability type | 140 |
| var. amplitude | 0.04 |
| var. period | 0.18 |
| var. epoch | 2443602 3. April 1978, 12:00:00 UT |
| next max light | 2451809.28 21. September 2000, 18:43:12 UT |
double/multiple star system information:
| separation between brightest and second brightest component | 158.2 arcsec |
| magnitude difference between brightest and second brightest component | 4.7 |
| position angle | 204 ° |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 4.56 | B3 | t1Lupi, HR 5395, HD 126341, SAO 224919 |
| B | - | M0 |
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 | |
| 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 (B1950) | RA: 14h 22min 54.967sec | DEC: -44° 59' 46.85'' | ±0.012 arcsec |
| position (2000.72) | RA: 14h 26min 11sec | DEC: -45° 13' 28'' | JD: 2451809.23 |
| position (J2000) | RA: 14h 26min 8.236sec | DEC: -45° 13' 17.09'' | |
| proper motion B1950 (FK4) | RA: -0.0012 arcsec/a | DEC: -0.015 arcsec/a | ±0.003 arcsec/a in RA ±0.003 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0011 arcsec/a | DEC: -0.012 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 4.6 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
| spectral class | B3 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | FK4, catalogue number: 1377 |
| Durchmusterung | CD-44 9322 |
| Boss General Catalogue | 19453 |
| Henry Draper Catalogue | 126341 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 14h 26.1min | DEC: -45° 13' |
| proper motion (J2000) | RA: -0.012 arcsec/a | DEC: -0.013 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 |
| - | 1913 | 1 | 204° | 158.2'' | 4.56 | 9.3 | B2IV | DUN 160 |
discoverer information:
| discoverer code | discoverer | reference |
| DUN 160 | Dunlop, J. | - |
notes:
| note | Tau (1) Lup. Variable. B is CD-44@9321. |
data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 14h 22min 55sec | DEC: -44° 59' 47'' |
variability informations:
| variability type | BCEP | pulsating variable star |
| magnitute at max. brightness | 4.54 | |
| magnitute at min. brightness | 4.58 | |
| photometric system | visual, photovisual or Johnson's V | |
| epoch for maximum light [JD] | 2443602.1269 3. April 1978, 15:02:44 UT |
|
| period [d] | 0.17738884 | |
| next maximum light [JD] | 2451809.37636028 21. September 2000, 21:01:58 UT |
spectral information
| spectral class | B2IV |
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 | 50/90191 |
| constellation | Lupus |
| notes on existence | The star is equivalent to '0510001 R'. |
variability type description
| variability type | description |
| BCEP | Variables of the Beta Cephei type (Beta Cep, Beta CMa), which are pulsating O8-B6 I-V stars with periods of light and radial-velocity variations in the range of 0.1 - 0.6 days and light amplitudes from 0.01 to 0.3 mag in V. The light curves are similar in shape to average radial-velocity curves but lag in phase by a quarter of the period, so that maximum brightness corresponds to maximum contraction, i.e., to minimum stellar radius. The majority of these stars probably show radial pulsations, but some (V649 Per) display nonradial pulsations; multiperiodicity is characteristic of many of these stars. |