omicron Tauri

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

position, motion, parallax:

position (J2000)	RA: 3h 24min 48.8sec	DEC: +9° 1' 44''
position (B1900)	RA: 3h 19min 25.8sec	DEC: +8° 40' 37''
proper motion (J2000)	RA: -0.066 arcsec/a	DEC: -0.078 arcsec/a
radial velocity	-21 km/s note: spectroscopic binaries, single lined spectra note: orbital data avaible
rotational velocity	<17 km/s (uncertain) (variable)
trigonometric parallax	0.016 arcsec
galactic coordinates	longitude: 174.12°	latitude: -38.16°

magnitude

visual magnitude

3.6
(V on UBV Johnson system)

spectral / color information

spectral class	G6IIIFe-1
B-V-magnitude	0.89
U-B-magnitude	0.61
R-I-magnitude
IR-note	object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

variability information

variable star identification

1134

double/multiple star system information

note (category: spectroscopic binaries):

1654.9d, K 4.4k/s, V0 -20.1k/s, asini 96.7. Unresolved by speckle interferometry.

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

position, motion, parallax:

magnitude:

visual	3.6 (observed)	source: 25
photovisual	3.8	source: 2

spectral information:

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
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 (B1950)	RA: 3h 22min 7.121sec	DEC: +8° 51' 15.25''	±0.004 arcsec
position (J2000)	RA: 3h 24min 48.8sec	DEC: +9° 1' 43.84''
proper motion B1950 (FK4)	RA: -0.0046 arcsec/a	DEC: -0.075 arcsec/a	±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC
proper motion J2000 (FK5)	RA: -0.0044 arcsec/a	DEC: -0.078 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	3.8 (accuracy: 2 decimals)
source of visual magnitude data	Taken from the "Henry Draper Catalogue".

spectral information:

spectral class	G5
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)

position:

position (equinox 1950.0)

RA: 3h 22min 7.1sec

DEC: +8° 51' 15''

variability informations:

magnitute at max. brightness	3.57
magnitute at min. brightness	3.62
photometric system	visual, photovisual or Johnson's V

spectral information

spectral class

references

to a study

290477D (designation: ZI 186)

miscanellous

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

catalogues and names	o Tau, NSV 01134, 1 Tau, HR 1030, HD 21120, SAO 111172, BD +8 511, FK5: 121
constellation	Taurus