e Bootis


The object was found in the following catalogues:
  1. The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version)

  2. SKY2000 - Master Star Catalog

  3. Smithsonian Astrophysical Observatory Star Catalog

  4. The Washington Visual Double Star Catalog, 1996.0


catalogues and names e Boo, 36 Boo, HR 5505, HD 129988, SAO 83500, WDS 14450+2704B
constellation Bootes

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


position, motion, parallax:

position (J2000) RA: 14h 44min 59,2sec DEC: +27 4' 30''
position (J1900) RA: 14h 40min 37,1sec DEC: +27 29' 47''
proper motion (J2000) RA: -0,05 arcsec/a DEC: 0,021 arcsec/a
radial velocity -23 km/s
note: spectroscopic binaries, double lined spectra
rotational velocity 147 km/s (uncertain) (variable)
trigonometric parallax 0,016 arcsec
note (category: dynamical parallaxes): 0.007".

magnitude

visual magnitude 5,12
(original HR magnitude)

spectral / color information

spectral class A2V

double/multiple star system information

number of components of multiple star system 3
separation 2,8 arcsec
mag difference (of double or brightest multiple) 2,6
component ID AB
note (category: double and multiple data): Binary with HR 5506.

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

position, motion, parallax:

position (J2000) RA: 14h 44min 59,161sec DEC: +27 4' 29,73'' 0,5 arcsec source: 25
proper motion (J2000) RA: -0,0038 arcsec/a DEC: 0,025 arcsec/a source: 25
radial velocity -23 km/s source: 25
trigonometric parallax 0,016 0,002 arcsec source: 25
galactic coord. (B1950) longitude: 39,38 latitude: 64,78
GCI unit vector (J2000) X: -0,669483 Y: -0,587049 Z: 0,455155

magnitude:

visual 5,12 (observed) source: 51
photovisual 5,1 source: 2
photographic 5,1 source: 2

spectral information:

spectral class A0 source: 96
Morgan-Keenan A2V source: 25
B-magnitude 6,09 0,004 B-V-magnitude 0,968
U-magnitude 6,81 0,024 U-B-magnitude 0,718

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 2,6 arcsec
magnitude difference between brightest and second brightest component 2,4
position angle 343

component magnitude spectral class catalogue(s)/name(s)
A 2,7 K0 Izar, e Bootis, 36 Boo, HR 5506, HD 129989, SAO 83500
B 5,12 A0 e Bootis, 36 Boo, HR 5505, HD 129988, SAO 83500

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
51 Harvard photometry
"H" coded (Harvard photometry) magnitudes from the BSC5.
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: 14h 42min 48,137sec DEC: +27 17' 2,66'' 0,005 arcsec
position (J2000) RA: 14h 44min 59,229sec DEC: +27 4' 27,14''
proper motion J1950 (FK4) RA: -0,0038 arcsec/a DEC: 0,018 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0037 arcsec/a DEC: 0,021 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 2,7 (accuracy: 2 decimals)
source of visual magnitude data Combined magnitude of component stars.

spectral information:

spectral class K0
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: 1633
Durchmusterung BD+27 2417
Boss General Catalogue 19856
Henry Draper Catalogue 129988
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 45min DEC: +27 4'
proper motion (J2000) RA: -0,051 arcsec/a DEC: 0,025 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 1822 often 321 2,6'' 2,7 5,1 K0II-III STF1877
1988 343 -
AC 1912 3 257 178,7'' 2,7 12 - STF1877
1988 256 176,4''

discoverer information:

discoverer code discoverer reference
STF1877 Struve, F.G.W. -

notes:

note Epsilon Boo. B is a spectroscopic binary.