k Tucanae
| catalogues and names | k Tuc, NSV 00454, HR 377, HD 7788, SAO 248346, WDS 01158-6853A |
| constellation | Tucana |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 1h 15min 46,1sec | DEC: -68° 52' 34'' |
| position (J1900) | RA: 1h 12min 22,7sec | DEC: -69° 24' 26'' |
| proper motion (J2000) | RA: 0,399 arcsec/a | DEC: 0,107 arcsec/a |
| radial velocity | 9 km/s | |
| rotational velocity | 111 km/s (uncertain) (variable) | |
| trigonometric parallax | 0,061 arcsec | |
| note (category: dynamical parallaxes): | 0.049". |
magnitude
| visual magnitude | 4,86 (V on UBV Johnson system) |
spectral / color information
| spectral class | F6IV |
| B-V-magnitude | 0,47 |
| U-B-magnitude | 0,03 |
| R-I-magnitude | 0,22 |
variability information
| variable star identification | 454 |
double/multiple star system information
| number of components of multiple star system | 4 |
| separation | 5,2 arcsec |
| mag difference (of double or brightest multiple) | 2,2 |
| component ID | AB |
| note | Worley (1978) update of the IDS |
| note (category: double and multiple data): | Quadruple system consisting of two close CPM pairs separated by 320": CPD -69d45, components AB, 5.1, 7.3, 5" and CPD -69d44, components CD. AB, 1222.4y, a = 7.64"; CD 7.8 G5, 8.2, 86.2y, a = 1.12". |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 1h 15min 46,243sec | DEC: -68° 52' 33,58'' | ±0,19 arcsec | source: 16 |
| proper motion (J2000) | RA: 0,0766 arcsec/a | DEC: 0,104 arcsec/a | source: 25 | |
| radial velocity | 9 km/s | source: 25 | ||
| trigonometric parallax | 0,061 | ±0,006 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 299,66° | latitude: -48,1° | ||
| GCI unit vector (J2000) | X: 0,34087 | Y: 0,11699 | Z: -0,932803 | |
magnitude:
| visual | 4,86 (observed) | source: 25 |
| photovisual | 5 | source: 2 |
| photographic | 5,5 | source: 2 |
spectral information:
| spectral class | F8 | source: 96 | |
| Morgan-Keenan | F6IV | source: 25 | |
| B-magnitude | 5,33 ±0,05 | B-V-magnitude | 0,47 |
| U-magnitude | 5,36 ±0,05 | U-B-magnitude | 0,03 |
double/multiple star system information:
| separation between brightest and second brightest component | 5,1 arcsec |
| magnitude difference between brightest and second brightest component | 2,2 |
| position angle | 325 ° |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 4,86 | F8 | k Tucanae, HR 377, HD 7788, SAO 248346 |
| B | - | - | |
| C | 7,22 | G5 |
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 | |
| 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 14min 4,616sec | DEC: -69° 8' 28,63'' | ±0,032 arcsec |
| position (J2000) | RA: 1h 15min 46,123sec | DEC: -68° 52' 33,67'' | |
| proper motion J1950 (FK4) | RA: 0,0758 arcsec/a | DEC: 0,112 arcsec/a | ±0,005 arcsec/a in RA ±0,005 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0,0738 arcsec/a | DEC: 0,107 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5,1 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | F8 |
| 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: 1536 |
| Durchmusterung | CP-69 45A |
| Boss General Catalogue | 1536 |
| Henry Draper Catalogue | 7788 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 1h 15,8min | DEC: -68° 53' |
| proper motion (J2000) | RA: 0,403 arcsec/a | DEC: 0,093 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 | 1836 | 56 | 16° | 4,7'' | 5,1 | 7,3 | F6IV | HJ 3423 |
| 1990 | 325° | 5,1'' | ||||||
| A-CD | 1874 | 2 | 309° | 319,3'' | - | - | - | HJ 3423 |
| CD | 1897 | 58 | 180° | 1,2'' | 8,1 | 8,6 | K2V | I 27 |
| 1991 | 230° | 9'' |
discoverer information:
| discoverer code | discoverer | reference |
| HJ 3423 | Herschel, J. | - |
| I 27 | Innes, R.T.A. | - |
notes:
| note | Kappa Tuc. A premature orbit has been computed. CD; P = 86yr., a = 1.12", motion direct. |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (J1950) | RA: 1h 14min 4,6sec | DEC: -69° 8' 29'' |
variability informations:
| magnitute at min. brightness | |
| photometric system |
spectral information
| spectral class | F6 |
references
| to a study | 670950D (designation: HR 377) |
miscanellous
| designation in the GCVS catalogue | SMC V2295 |
| There are notes in the published catalog (Kukarkin et al.(1982)). | |