Haedi
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. |
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 |
magnitude
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 |
magnitude:
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:
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 |
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 | |
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 |
magnitude:
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 |
catalogues
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:
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 |
references
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' |
miscanellous
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. EA 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. EB 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. EW 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. |