k1Tauri
| catalogues and names | k1Tau, NSV 01593, 65 Tau, HR 1387, HD 27934, SAO 76601, WDS 04253+2215A |
| constellation | Taurus |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 4h 25min 22,1sec | DEC: +22° 17' 38'' |
| position (J1900) | RA: 4h 19min 24,4sec | DEC: +22° 3' 54'' |
| proper motion (J2000) | RA: 0,096 arcsec/a | DEC: -0,048 arcsec/a |
| radial velocity | 40 km/s note: spectroscopic binaries |
|
| rotational velocity | 81 km/s (uncertain) (variable) | |
| trigonometric parallax | 0,025 arcsec | |
magnitude
| visual magnitude | 4,22 (V on UBV Johnson system) |
spectral / color information
| spectral class | A7IV-V |
| B-V-magnitude | 0,13 |
| U-B-magnitude | 0,13 |
| R-I-magnitude | 0,05 |
variability information
| variable star identification | 1593 |
| note (category: variability): | Delta Sct? |
double/multiple star system information
| number of components of multiple star system | 6 |
| separation | 0,1 arcsec |
| mag difference (of double or brightest multiple) | 0 |
| component ID | O |
| note (category: double and multiple data): | Kappa1 Tau is occultation double. Together with Kappa2 = HR 1388 they form a multiple system of at least 6 components. |
miscellaneous information
| note (category: group membership): | In Hyades cluster; Mel 25 #54. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 4h 25min 22,166sec | DEC: +22° 17' 38,07'' | ±0,43 arcsec | source: 16 |
| proper motion (J2000) | RA: 0,0076 arcsec/a | DEC: -0,047 arcsec/a | source: 25 | |
| radial velocity | 40 km/s | source: 25 | ||
| trigonometric parallax | 0,025 | ±0,002 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 174,57° | latitude: -18,48° | ||
| GCI unit vector (J2000) | X: 0,371276 | Y: 0,847492 | Z: 0,379358 | |
magnitude:
| visual | 4,22 (observed) | source: 25 |
| photovisual | 4,4 | source: 2 |
| photographic | 4,4 | source: 16 |
spectral information:
| spectral class | A3 | source: 96 | |
| Morgan-Keenan | A7IV-V | source: 25 | |
| B-magnitude | 4,35 ±0,05 | B-V-magnitude | 0,13 |
| U-magnitude | 4,48 ±0,05 | U-B-magnitude | 0,13 |
double/multiple star system information:
| separation between brightest and second brightest component | 339,5 arcsec |
| magnitude difference between brightest and second brightest component | 1,05 |
| position angle | 173 ° |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 4,22 | A3 | k1Tauri, 65 Tau, HR 1387, HD 27934, SAO 76601 |
| B | 5,28 | F0 | k2Tauri, 67 Tau, HR 1388, HD 27946, SAO 76602 |
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: 4h 22min 23,083sec | DEC: +22° 10' 51,94'' | ±0,016 arcsec |
| position (J2000) | RA: 4h 25min 22,12sec | DEC: +22° 17' 37,63'' | |
| proper motion J1950 (FK4) | RA: 0,007 arcsec/a | DEC: -0,046 arcsec/a | ±0,003 arcsec/a in RA ±0,002 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0,0069 arcsec/a | DEC: -0,048 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 4,4 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | A3 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | GC, catalogue number: 5350 |
| Durchmusterung | BD+21 642 |
| Boss General Catalogue | 5350 |
| Henry Draper Catalogue | 27934 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 4h 25,3min | DEC: +22° 15' |
| proper motion (J2000) | RA: 0 arcsec/a | DEC: 0 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 |
| - | 1874 | 8 | 328° | 5,3'' | 9,5 | 9,8 | - | STF 541 |
| - | 1873 | 1 | 356° | 156,8'' | 5,28 | - | A7V | STF 541 |
discoverer information:
| discoverer code | discoverer | reference |
| STF 541 | Struve, F.G.W. | - |
notes:
| note | J 2722. This faint pair is between Kappa (1) and Kappa (2) Tau. Kappa (2) Tau. |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (J1950) | RA: 4h 22min 23,1sec | DEC: +22° 10' 52'' |
variability informations:
| variability type | DSCT: | pulsating variable star |
| magnitute at max. brightness | 4,22 | |
| magnitute at min. brightness | ||
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | A5 |
references
| to a study | 711033D (designation: KAPPA TAU) |
variability type description
| variability type | description |
| DSCT |
Variables of the Delta Scuti type. These are pulsating variables of spectral types A0-F5 III-V displaying light amplitudes from 0.003 to 0.9 mag in V (usually several hundredths of a magnitude) and periods from 0.01 to 0.2 days. The shapes of the light curves, periods, and amplitudes usually vary greatly. Radial as well as nonradial pulsations are observed. The variability of some members of this type appears sporadically and sometimes completely ceases, this being a consequence of strong amplitude modulation with the lower value of the amplitude not exceeding 0.001 mag in some cases. The maximum of the surface layer expansion does not lag behind the maximum light for more than 0.1 periods. DSCT stars are representatives of the galactic disk (flat component) and are phenomenologically close to the SX Phe variables. DSCTC Low amplitude group of Delta Sct variables (light amplitude <0.1 mag in V). The majority of this type's representatives are stars of luminosity class V; objects of this subtype generally are representative of the Delta Sct variables in open clusters. |