z1Coronae Borealis


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 z1CrB, 7 CrB, HR 5833, HD 139891, SAO 64833, WDS 15394+3638B
constellation Corona Borealis

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


position, motion, parallax:

position (J2000) RA: 15h 39min 22,2sec DEC: +36 38' 12''
position (J1900) RA: 15h 35min 36,2sec DEC: +36 57' 41''
proper motion (J2000) RA: -0,014 arcsec/a DEC: -0,013 arcsec/a
radial velocity -19 km/s
rotational velocity 25 km/s (uncertain) (variable)
trigonometric parallax 0,015 arcsec
note (category: dynamical parallaxes): 0.010".

magnitude

visual magnitude 6
(original HR magnitude)

spectral / color information

spectral class B9V

double/multiple star system information

separation 6,4 arcsec
mag difference (of double or brightest multiple) 1
note (category: double and multiple data): Binary with HR 5834. Colors for combined light; combined mag., 66V.

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

position, motion, parallax:

position (J2000) RA: 15h 39min 22,26sec DEC: +36 38' 12,3'' 0,76 arcsec source: 18
proper motion (J2000) RA: -0,0014 arcsec/a DEC: -0,011 arcsec/a source: 25
radial velocity -19 km/s source: 25
trigonometric parallax 0,015 0,002 arcsec source: 25
galactic coord. (B1950) longitude: 58,7 latitude: 53,41
GCI unit vector (J2000) X: -0,46206 Y: -0,65605 Z: 0,59674

magnitude:

visual 6,01 (observed) source: 25
photovisual 6 source: 2
photographic 6 source: 2

spectral information:

spectral class B8 source: 29
Morgan-Keenan B9V source: 25
B-magnitude 5,92 0,05 B-V-magnitude -0,09
U-magnitude 5,45 0,05 U-B-magnitude -0,47

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 6,3 arcsec
magnitude difference between brightest and second brightest component 0,9
position angle 305

component magnitude spectral class catalogue(s)/name(s)
A 5,05 B8 z2Coronae Borealis, 7 CrB, HR 5834, HD 139892, SAO 64834
B 6,01 B8 z1Coronae Borealis, 7 CrB, HR 5833, HD 139891, SAO 64833

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
18 Hipparcos Input Catalog Version 2 Annex
Turon, C., et al., "The Hipparcos Input Catalog, Version 2," Centre de Donnees Stellaires Information Bulletin, Vol. 43, p. 5, 1993
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
29 SAOJ2000
SAO on FK5 at J2000, 1989

data from Smithsonian Astrophysical Observatory Star Catalog (SAO Staff 1966; USNO, ADC 1990)

position and proper motion:

position (J1950) RA: 15h 37min 29,106sec DEC: +36 47' 52,71'' 0,032 arcsec
position (J2000) RA: 15h 39min 22,206sec DEC: +36 38' 11,77''
proper motion J1950 (FK4) RA: -0,0015 arcsec/a DEC: -0,016 arcsec/a 0,005 arcsec/a in RA
0,005 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0012 arcsec/a DEC: -0,013 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 6 (accuracy: 2 decimals)
source of visual magnitude data Taken from Harvard or San Luis photometry.

spectral information:

spectral class B8
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

remarks for duplicity and variability

Double star in Aitken's Double Star Catalogue (Aitken 1932)

catalogues

source catalogue GC, catalogue number: 21063
Durchmusterung BD+37 2665B
Boss General Catalogue 21063
Henry Draper Catalogue 139891

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

position and proper motion:

position (J2000) RA: 15h 39,4min DEC: +36 38'
proper motion (J2000) RA: -0,014 arcsec/a DEC: -0,009 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
- 1822 often 301 6'' 5,1 6 B7V B9V STF1965
1978 305 6,3''

discoverer information:

discoverer code discoverer reference
STF1965 Struve, F.G.W. -

notes:

note Zeta (2) CrB. A is a spectroscopic binary. B is Zeta (1) CrB. Proper motion of B -017 -023.