zeta Bootis

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

position, motion, parallax:

position (J2000)	RA: 14h 41min 8.9sec	DEC: +13° 43' 42''
position (B1900)	RA: 14h 36min 22.3sec	DEC: +14° 9' 26''
proper motion (J2000)	RA: 0.053 arcsec/a	DEC: -0.016 arcsec/a
radial velocity	-6 km/s
trigonometric parallax	0.009 arcsec
galactic coordinates	longitude: 10.8°	latitude: 61.12°

note (category: dynamical parallaxes):

0.012".

magnitude

visual magnitude

4.83
(original HR magnitude)

spectral / color information

spectral class

A2III

variability information

variable star identification

6766

double/multiple star system information

number of components of multiple star system	3
separation	1.2 arcsec
mag difference (of double or brightest multiple)	0.1
component ID	AB

note (category: double and multiple data):

Binary with HR 5478, q.v.

miscellaneous information

note (category: group membership):

Sirius group? UMa stream.

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

position, motion, parallax:

position (J2000)	RA: 14h 41min 8.913sec	DEC: +13° 43' 42.05''	ą0.19 arcsec	source: 33
proper motion (J2000)	RA: 0.0036 arcsec/a	DEC: -0.015 arcsec/a		source: 25
radial velocity	-6 km/s			source: 25
trigonometric parallax	0.009 arcsec		ą0.001 arcsec	source: 25
galactic coord. (B1950)	longitude: 10.81°	latitude: 61.12°

magnitude:

visual	4.55 (observed)	source: 25
photovisual	4.8	source: 2
photographic	4.9	source: 2

spectral information:

spectral class	A2		source: 96
Morgan-Keenan	A2III		source: 25
B-magnitude	3.821 ą0.05	B-V-magnitude	0.048
U-magnitude	3.88 ą0.07	U-B-magnitude	0.05

double/multiple star system information:

source of data: 19

magnitude difference between brightest and second brightest component

0.4

component	magnitude	spectral class	catalogue(s)/name(s)
A	4.52	A2	z Bootis, 30 Boo, HR 5478, HD 129247, SAO 101145
B	4.55	A2	z Bootis, 30 Boo, HR 5477, HD 129246, SAO 101145

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
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
33	Hipparcos Main Input Catalogue Version 2
Turon, C., et al., The Hipparcos Input Catalogue, Version 2, CDS Bull. No. 43, p.5, 1993
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: 14h 38min 45.54sec	DEC: +13° 56' 30.48''	ą0.011 arcsec
position (J2000)	RA: 14h 41min 8.92sec	DEC: +13° 43' 41.88''
proper motion B1950 (FK4)	RA: 0.0036 arcsec/a	DEC: -0.02 arcsec/a	ą0.002 arcsec/a in RA ą0.002 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0037 arcsec/a	DEC: -0.016 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	3.9 (accuracy: 2 decimals)
source of visual magnitude data	Combined magnitude of component stars.

spectral information:

spectral class	A2
source of spectral data	Taken from the HD with M stars reclassified by Miss Cannon.

remarks for duplicity and variability

Double star - see source catalog for source

catalogues

source catalogue	FK3, catalogue number: 543
Durchmusterung	BD+14 2770
Boss General Catalogue	19777
Henry Draper Catalogue	129246 The "SAO Catalog" entry refers to two consecutive HD numbers, the lower of which is given.

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

position and proper motion:

position (J2000)	RA: 14h 41.1min	DEC: +13° 44'
proper motion (J2000)	RA: 0.052 arcsec/a	DEC: -0.02 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
AB	1830	often	°	''	4.4	4.8	A2V	STF1865
AB-C	1901	7	259°	98.6''	4.4	10.9	-	H 104
AB-C	1989	7	-	103.8''	4.4	10.9	-	H 104

discoverer information:

discoverer code	discoverer	reference
STF1865	Struve, F.G.W.	-
H 104	Herschel, W.	-

notes:

note	Zeta Boo. P = 123yr., a = 0.60", motion retrograde. H IV 104.

data from 4th Catalog of Orbits of Visual Binaries (Worley+, 1983)

position:

position (B1900)

RA: 14h 36.4min

DEC: +14° 9'

magnitudes, spectral classes, orbital elements:

author:	S. Wierzbinski
date of observation:	1953
magnitude of component A:	4.52
magnitude of component B:	4.52
spectral class component B:	A2III
spectral class component B:	A2III
period [y]:	123.44
semi-major axis [arcsec]:	0.595
inclination [deg]:	142
node [deg]:	129.99
equinox of node:	1900
eccentricity:	0.957
time of periastron passage:	1897.59
dates of ephemeris:	1950-1975
grade:	good
reference:	Acta Astron. 6, 82; 1956.

other name(s)

STF 1865, Zeta Boo

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

position:

position (equinox 1950.0)

RA: 14h 38min 45.5sec

DEC: +13° 56' 30''

variability informations:

variability type	-
magnitute at max. brightness	3.78
magnitute at min. brightness
photometric system	visual, photovisual or Johnson's V

spectral information

spectral class

references

to a study

0132D (designation: 1865)

miscanellous

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

catalogues and names	z Boo, NSV 06766, 30 Boo, HR 5477, HD 129246, SAO 101145, BD +14 2770, WDS 14411+1344B
constellation	Bootes