The object was found in the following catalogues:
  1. The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version)

  2. SKY2000 - Master Star Catalog

  3. Smithsonian Astrophysical Observatory Star Catalog

  4. The Washington Visual Double Star Catalog, 1996.0

  5. Combined General Catalogue of Variable Stars (suspected variables)

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


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


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:

source of data: 19
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


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


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.


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. -


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 (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


to a study 711033D (designation: KAPPA TAU)

variability type description

variability type description
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.

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.