catalogues and names

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

SKY2000 - Master Star Catalog

Smithsonian Astrophysical Observatory Star Catalog

catalogues and names

catalogues and names	i Tau, 102 Tau, HR 1620, HD 32301, SAO 76920, BD +21 751, FK5: 184
constellation	Taurus

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

position, motion, parallax:

position (J2000)	RA: 5h 3min 5.7sec	DEC: +21° 35' 24''
position (B1900)	RA: 4h 57min 7sec	DEC: +21° 26' 50''
proper motion (J2000)	RA: 0.066 arcsec/a	DEC: -0.042 arcsec/a
radial velocity	41 km/s
rotational velocity	126 km/s (uncertain) (variable)
trigonometric parallax	0.019 arcsec
galactic coordinates	longitude: 180.77°	latitude: -12.06°

magnitude

visual magnitude

4.64 (V on UBV Johnson system)

spectral / color information

spectral class	A7V
B-V-magnitude	0.16
U-B-magnitude	0.15
R-I-magnitude

double/multiple star system information

separation	0.1 arcsec
mag difference (of double or brightest multiple)	0
note	doublicity discoverd by occultation

note (category: double and multiple data):

Probable double, 5.4, 5.4v, sep. 0.4".

miscellaneous information

note (category: group membership):

Hyades cluster; Mel 25 #129.

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

position, motion, parallax:

position (J2000)	RA: 5h 3min 5.739sec	DEC: +21° 35' 23.79''	±0.06 arcsec	source: 15
proper motion (J2000)	RA: 0.0047 arcsec/a	DEC: -0.042 arcsec/a		source: 25
radial velocity	41 km/s			source: 25
trigonometric parallax	0.019 arcsec		±0.002 arcsec	source: 25
galactic coord. (B1950)	longitude: 180.78°	latitude: -12.06°

magnitude:

visual	4.64 (observed)	source: 25
photovisual	4.7	source: 2

spectral information:

spectral class	A5		source: 96
Morgan-Keenan	A7V		source: 25
B-magnitude	4.8 ±0.05	B-V-magnitude	0.16
U-magnitude	4.95 ±0.05	U-B-magnitude	0.15

double/multiple star system information:

source of data: 25

separation between brightest and second brightest component	0.1 arcsec
magnitude difference between brightest and second brightest component	0

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: 5h 0min 6.223sec	DEC: +21° 31' 13.24''	±0.003 arcsec
position (J2000)	RA: 5h 3min 5.734sec	DEC: +21° 35' 23.76''
proper motion B1950 (FK4)	RA: 0.0047 arcsec/a	DEC: -0.041 arcsec/a	±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0046 arcsec/a	DEC: -0.042 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	4.7 (accuracy: 2 decimals)
source of visual magnitude data	Taken from the "Henry Draper Catalogue".

spectral information:

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

catalogues

source catalogue	FK4, catalogue number: 184
Durchmusterung	BD+21 751
Boss General Catalogue	6158
Henry Draper Catalogue	32301