k2Tauri


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 k2Tau, NSV 01594, 67 Tau, HR 1388, HD 27946, SAO 76602, WDS 04253+2215
constellation Taurus

data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)


position, motion, parallax:

position (J2000) RA: 4h 25min 25sec DEC: +22 11' 59''
position (J1900) RA: 4h 19min 27,4sec DEC: +21 58' 17''
proper motion (J2000) RA: 0,109 arcsec/a DEC: -0,054 arcsec/a
radial velocity 32 km/s
note: variable radial velocity
rotational velocity 153 km/s (uncertain) (variable)

magnitude

visual magnitude 5,28
(V on UBV Johnson system)

spectral / color information

spectral class A7V
B-V-magnitude 0,25
U-B-magnitude 0,1
R-I-magnitude 0,14

variability information

variable star identification 1594
note (category: variability): Delta Sct, 5.26 - 5.29V.

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): See HR 1387.

miscellaneous information

note (category: group membership): In Hyades cluster; Mel 25 #55.

data from SKY2000 - Master Star Catalog (Myers+ 1997)

position, motion, parallax:

position (J2000) RA: 4h 25min 25,005sec DEC: +22 12' 0,04'' 0,35 arcsec source: 17
proper motion (J2000) RA: 0,0079 arcsec/a DEC: -0,046 arcsec/a source: 25
radial velocity 32 km/s source: 25
galactic coord. (B1950) longitude: 174,65 latitude: -18,54
GCI unit vector (J2000) X: 0,37135 Y: 0,848137 Z: 0,377841

magnitude:

visual 5,28 (observed) source: 25
photovisual 5,4 source: 2
photographic 5,7 source: 16

spectral information:

spectral class F0 source: 96
Morgan-Keenan A7V source: 25
B-magnitude 5,53 0,05 B-V-magnitude 0,25
U-magnitude 5,63 0,05 U-B-magnitude 0,1

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 156,8 arcsec
position angle 356

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
17 ACRS
Corbin, T.E., and S.E. Urban, Astrographic Catalog Reference Stars, United States Naval Observatory, 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
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 26,032sec DEC: +22 5' 13,99'' 0,017 arcsec
position (J2000) RA: 4h 25min 25sec DEC: +22 11' 59,19''
proper motion J1950 (FK4) RA: 0,0079 arcsec/a DEC: -0,052 arcsec/a 0,003 arcsec/a in RA
0,002 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0078 arcsec/a DEC: -0,054 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 5,4 (accuracy: 2 decimals)
source of visual magnitude data Taken from Harvard or San Luis photometry.

spectral information:

spectral class F0
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue GC, catalogue number: 5351
Durchmusterung BD+21 643
Boss General Catalogue 5351
Henry Draper Catalogue 27946

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 26sec DEC: +22 5' 14''

variability informations:

variability type DSCT: pulsating variable star
magnitute at max. brightness 5,26
magnitute at min. brightness 5,29
photometric system visual, photovisual or Johnson's V

spectral information

spectral class A7

references

to a study 711033D (designation: 67 TAU)

miscanellous

There are notes in the published catalog (Kukarkin et al.(1982)).

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.