catalogues and names

The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version)

SKY2000 - Master Star Catalog

Smithsonian Astrophysical Observatory Star Catalog

The Washington Visual Double Star Catalog, 1996.0

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

catalogues and names

catalogues and names	u Tau, ups Tau, 69 Tau, HR 1392, HD 28024, SAO 76608, BD +22 696, FK5: 2326, WDS 04263+2249
constellation	Taurus

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

note (category: star names):

Some sources call this Upsilon1 and HR 1399 Upsilon2 Tau; other catalogues reverse these designations. The superscripts now rarely used and Upsilon retained for 69 Tau.

position, motion, parallax:

position (J2000)	RA: 4h 26min 18.5sec	DEC: +22° 48' 49''
position (2000.73)	RA: 4h 26min 22sec	DEC: +22° 48' 55''
position (B1900)	RA: 4h 20min 19.3sec	DEC: +22° 35' 13''
proper motion (J2000)	RA: 0.107 arcsec/a	DEC: -0.046 arcsec/a
radial velocity	35 km/s note: spectroscopic binaries, single lined spectra
rotational velocity	196 km/s (uncertain) (variable)
trigonometric parallax	0.036 arcsec
galactic coordinates	longitude: 174.3°	latitude: -17.98°

magnitude

visual magnitude

4.28 (V on UBV Johnson system)

spectral / color information

spectral class	A8Vn
B-V-magnitude	0.26
U-B-magnitude	0.14
R-I-magnitude

variability information

variable star identification

Ups Tau

double/multiple star system information

number of components of multiple star system	3
separation	0 arcsec
mag difference (of double or brightest multiple)	1.9
note	Worley (1978) update of the IDS

note (category: double and multiple data):

The visual primary is SB, 4.6, 6.5v, sep. 0.020". Component B, 12.5v at 110".

miscellaneous information

note (category: group membership):

In Hyades cluster; Mel 25 #60.

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

position, motion, parallax:

position (J2000)	RA: 4h 26min 18.459sec	DEC: +22° 48' 48.78''	±0.22 arcsec	source: 15
position (2000.73)	RA: 4h 26min 21sec	DEC: +22° 48' 55''	JD: 2451810.88
proper motion (J2000)	RA: 0.0077 arcsec/a	DEC: -0.046 arcsec/a		source: 25
radial velocity	35 km/s			source: 25
trigonometric parallax	0.036 arcsec		±0.004 arcsec	source: 25
galactic coord. (B1950)	longitude: 174.31°	latitude: -17.98°

magnitude:

visual	4.28 (observed)	source: 25
photovisual	4.4	source: 2

spectral information:

spectral class	A5		source: 96
Morgan-Keenan	A8Vn		source: 25
B-magnitude	4.54 ±0.05	B-V-magnitude	0.26
U-magnitude	4.68 ±0.05	U-B-magnitude	0.14

variability information:

source of data: 30

variability type	10
var. amplitude	0.03
var. period	0.15

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	110.2 arcsec
magnitude difference between brightest and second brightest component	8.2
position angle	289 °

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
30	GCVS, 4th edition
Kholopov, P.N., et al., General Catalogue of Variable Stars, fourth edition, Moscow: Nauka Publishing House, 1985-88
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: 4h 23min 18.68sec	DEC: +22° 42' 6.75''	±0.014 arcsec
position (2000.73)	RA: 4h 26min 21sec	DEC: +22° 48' 57''	JD: 2451810.88
position (J2000)	RA: 4h 26min 18.442sec	DEC: +22° 48' 48.76''
proper motion B1950 (FK4)	RA: 0.0076 arcsec/a	DEC: -0.045 arcsec/a	±0.002 arcsec/a in RA ±0.002 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0075 arcsec/a	DEC: -0.047 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	4.4 (accuracy: 2 decimals)
source of visual magnitude data	Taken from Harvard or San Luis photometry.

spectral information:

spectral class	A5
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	GC, catalogue number: 5370
Durchmusterung	BD+22 696
Boss General Catalogue	5370
Henry Draper Catalogue	28024

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

position and proper motion:

position (J2000)	RA: 4h 26.3min	DEC: +22° 49'
proper motion (J2000)	RA: 0.107 arcsec/a	DEC: -0.046 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
-	1909	2	289°	104.3''	4.28	12.5	A8Vn	BUP 58
	1960		-	110.2''

discoverer information:

discoverer code	discoverer	reference
BUP 58	-	-

notes:

note	Upsilon Tau. A is an occultation binary.

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

position:

position (equinox 1950.0)

RA: 4h 23min 18.7sec

DEC: +22° 42' 7''

variability informations:

variability type	DSCTC	pulsating variable star
magnitute at max. brightness	4.28
magnitute at min. brightness	4.31
photometric system	visual, photovisual or Johnson's V
period [d]	0.1484
rising time	50 % of period

spectral information

spectral class

A8Vn

references

to a study	Vol. III GCVS
to a chart/photograph	no chart is avaible, but the star is contained in the 'Bonner Durchmusterung'

miscanellous

ID in the GCVS catalogue	78/9020
constellation	Taurus
notes on existence	The star is equivalent to '0790001 R'.

variability type description

variability type

description

DSCTC

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.