Al Nath


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


catalogues and names Al Nath, b Tau, 112 Tau, HR 1791, HD 35497, SAO 77168, FK5: 202, WDS 05263+2836
other names Alnath, El Nath, Nath
constellation Taurus

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

note (category: star names): ALNATH; EL NATH; Nath. Beta Tau is also Gamma Aur, in Taurus.

object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

position, motion, parallax:

position (J2000) RA: 5h 26min 17,5sec DEC: +28 36' 27''
position (J1900) RA: 5h 19min 58,1sec DEC: +28 31' 23''
proper motion (J2000) RA: 0,022 arcsec/a DEC: -0,175 arcsec/a
radial velocity 9 km/s
note: variable radial velocity
rotational velocity 71 km/s (uncertain) (variable)
trigonometric parallax 0,028 arcsec
note (category: radial and/or rotational velocities): Expanding circumstellar shell.

magnitude

visual magnitude 1,65
(V on UBV Johnson system)

spectral / color information

spectral class B7III
B-V-magnitude -0,13
U-B-magnitude -0,49
R-I-magnitude -0,1
note (category: spectra): Manganese star.
note (category: colors): Color excess E(B-V) = 0.00.

double/multiple star system information

separation 33,4 arcsec
note Worley (1978) update of the IDS

miscellaneous information

note (category: group membership): Member of Pleiades group.

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

position, motion, parallax:

position (J2000) RA: 5h 26min 17,511sec DEC: +28 36' 26,67'' 0,06 arcsec source: 15
proper motion (J2000) RA: 0,0017 arcsec/a DEC: -0,175 arcsec/a source: 25
radial velocity 9 km/s source: 25
trigonometric parallax 0,028 0,003 arcsec source: 25
galactic coord. (B1950) longitude: 178 latitude: -3,74
GCI unit vector (J2000) X: 0,128659 Y: 0,868442 Z: 0,478805

magnitude:

visual 1,65 (observed) source: 25
photovisual 1,8 source: 2

spectral information:

spectral class B8 source: 96
Morgan-Keenan B7III source: 25
B-magnitude 1,52 0,05 B-V-magnitude -0,13
U-magnitude 1,03 0,05 U-B-magnitude -0,49

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 33,4 arcsec
position angle 239

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
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: 5h 23min 7,71sec DEC: +28 34' 1,74'' 0,003 arcsec
position (J2000) RA: 5h 26min 17,516sec DEC: +28 36' 26,63''
proper motion J1950 (FK4) RA: 0,0019 arcsec/a DEC: -0,175 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0018 arcsec/a DEC: -0,176 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 1,8 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class B8
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 202
Durchmusterung BD+28 795
Boss General Catalogue 6681
Henry Draper Catalogue 35497

data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)

position and proper motion:

position (J2000) RA: 5h 26,3min DEC: +28 36'
proper motion (J2000) RA: 0,022 arcsec/a DEC: -0,175 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
- 1898 1 239 33,4'' 1,65 - B7III BAR 26

discoverer information:

discoverer code discoverer reference
BAR 26 Barnard, E.E. (Astron. J 19, 113; 1898.)

notes:

note Beta Tau.