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. Combined General Catalogue of Variable Stars (Vol. I-III)

catalogues and names Haedi, z Aur, zet Aur, 8 Aur, HR 1612, HD 32068, SAO 39966, FK5: 1137
other names Haedus, Hoedus I, Sadatoni, Saclateni
constellation Auriga

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

note (category: star names): Haedi; Haedus; Hoedus I. With HR 1641, one of the "kids"; Sadatoni; Saclateni.

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

position, motion, parallax:

position (J2000) RA: 5h 2min 28,7sec DEC: +41 4' 33''
position (J1900) RA: 4h 55min 29,1sec DEC: +40 55' 48''
proper motion (J2000) RA: 0,009 arcsec/a DEC: -0,022 arcsec/a
radial velocity 13 km/s
note: spectroscopic binaries
note: orbital data avaible
rotational velocity 19 km/s
trigonometric parallax 0,005 arcsec


visual magnitude 3,75
(V on UBV Johnson system)

spectral / color information

spectral class K4II+B8V
B-V-magnitude 1,22
U-B-magnitude 0,38
R-I-magnitude 0,87
note (category: spectra): Also classified K5II + B5V.

variability information

variable star identification Zet Aur
note (category: variability): EA 3.70 - 3.97V, 972.164d, i 90d. Variable duration of min. Amp. depends on wavelength, 0.55B, 1.97U. K component amp. 0.05V.

double/multiple star system information

note (category: spectroscopic binaries): 972.162d, K 24.6k/s, V0 +12.9k/s, msin3i 7.54, asini 300. Unresolved by speckle interferometry . SKYLAB indicates cool star with hot companion.

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

position, motion, parallax:

position (J2000) RA: 5h 2min 28,685sec DEC: +41 4' 32,96'' 0,06 arcsec source: 15
proper motion (J2000) RA: 0,0008 arcsec/a DEC: -0,022 arcsec/a source: 25
radial velocity 13 km/s source: 25
trigonometric parallax 0,005 - source: 25
galactic coord. (B1950) longitude: 165,02 latitude: -0,43
GCI unit vector (J2000) X: 0,187224 Y: 0,730221 Z: 0,657057


visual 3,75 (observed) source: 25
photovisual 3,9 source: 2

spectral information:

spectral class K0 source: 96
Morgan-Keenan K4II+B8V source: 25
B-magnitude 4,97 0,05 B-V-magnitude 1,22
U-magnitude 5,35 0,05 U-B-magnitude 0,38

variability information:

source of data: 27
variability type 310
var. amplitude 0,3
var. period 972,16
var. epoch 2427692,82
12. September 1934, 07:40:48 UT
next max light 2451996,82
28. March 2001, 07:40:48 UT


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
25 Bright Star Catalogue, 5th edition
Hoffleit, D. and Warren, W.H. Jr., The Bright Star Catalogue, 5th Revised Edition, Version 2, 1994
27 Catalog of Red Magnitudes (CRM)
Warren, W.H. Jr., Northern Hemisphere Catalog of Red Magnitudes, 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 58min 58,68sec DEC: +41 0' 17,79'' 0,005 arcsec
position (J2000) RA: 5h 2min 28,682sec DEC: +41 4' 32,9''
proper motion J1950 (FK4) RA: 0,0008 arcsec/a DEC: -0,022 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0007 arcsec/a DEC: -0,023 arcsec/a
source of proper motion data Determined by source catalog


visual 3,9 (accuracy: 2 decimals)
source of visual magnitude data Arithmetic mean of maximum and minimum magnitudes of a variable star

spectral information:

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

remarks for duplicity and variability

Variable star in visual magnitude in source catalog


source catalogue FK4, catalogue number: 1137
Durchmusterung BD+40 1142
Boss General Catalogue 6137
Henry Draper Catalogue 32068
The "SAO Catalog" entry refers to two consecutive HD numbers, the lower of which is given.

data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)


position (J1950) RA: 4h 58min 58,7sec DEC: +41 0' 18''

variability informations:

variability type EA/GS close binary eclipsing system
magnitute at max. brightness 3,7
magnitute at min. brightness 3,97
photometric system visual, photovisual or Johnson's V
epoch for maximum light [JD] 2427692,825
12. September 1934, 07:48:00 UT
period [d] 972,16
next maximum light [JD] 2451996,825
28. March 2001, 07:48:00 UT
duration of the eclipse 04 % of period

spectral information

spectral class K5II+B7V


to a study Vol. I GCVS (see Kholopov et al. 1985-1988)
to a chart/photograph no chart is avaible, but the star is contained in the 'Bonner Durchmusterung'


ID in the GCVS catalogue 8/9006
constellation Auriga
notes on existence The star is equivalent to '0089008 tet'.
There are notes in published catalog.

variability type description

variability type description
EA Eclipsing binary systems. These are binary systems with orbital planes so close to the observer's line of sight (the inclination i of the orbital plane to the plane orthogonal to the line of sight is close to 90 deg) that the components periodically eclipse each other.
Consequently, the observer finds changes of the apparent combined brightness of the system with the period coincident with that of the components' orbital motion.

Algol (Beta Persei)-type eclipsing systems. Binaries with spherical or slightly ellipsoidal components. It is possible to specify, for their light curves, the moments of the beginning and end of the eclipses. Between eclipses the light remains almost constant or varies insignificantly because of reflection effects, slight ellipsoidality of components, or physical variations. Secondary minima may be absent. An extremely wide range of periods is observed, from 0.2 to >= 10000 days. Light amplitudes are also quite different and may reach several magnitudes.

Beta Lyrae-type eclipsing systems. These are eclipsing systems having ellipsoidal components and light curves for which it is impossible to specify the exact times of onset and end of eclipses because of a continuous change of a system's apparent combined brightness between eclipses; secondary minimum is observed in all cases, its depth usually being considerably smaller than that of the primary minimum; periods are mainly longer than 1 day. The components
generally belong to early spectral types (B-A). Light amplitudes are usually <2 mag in V.

W Ursae Majoris-type eclipsing variables. These are eclipsers with periods shorter than 1 days, consisting of ellipsoidal components almost in contact and having light curves for which it is impossible to specify the exact times of onset and end of eclipses. The depths of the primary and secondary minima are almost equal or differ insignificantly. Light amplitudes are usually <0.8 mag in V. The components generally belong to spectral types F-G and later.
GS Systems with one or both giant and supergiant components; one of the components may be a main sequence star.