Dsiban


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 Dsiban, y1Dra, 31 Dra, HR 6636, HD 162003, SAO 8890, FK5: 670, WDS 17419+7209A
other names Dziban
constellation Draco

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

note (category: star names): Dsiban; Dziban.

position, motion, parallax:

position (J2000) RA: 17h 41min 56,3sec DEC: +72 8' 56''
position (J1900) RA: 17h 43min 42,9sec DEC: +72 11' 53''
proper motion (J2000) RA: 0,025 arcsec/a DEC: -0,267 arcsec/a
radial velocity -10 km/s
note: suspected variable radial velocity
rotational velocity 14 km/s (uncertain) (variable)
trigonometric parallax 0,054 arcsec

magnitude

visual magnitude 4,58
(V on UBV Johnson system)

spectral / color information

spectral class F5IV-V
B-V-magnitude 0,42
U-B-magnitude 0,01
R-I-magnitude 0,23

double/multiple star system information

number of components of multiple star system 4
separation 30,2 arcsec
mag difference (of double or brightest multiple) 1,2
component ID AB
note (category: double and multiple data): CPM with HR 6637, not shared with components C,D.

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

position, motion, parallax:

position (J2000) RA: 17h 41min 56,342sec DEC: +72 8' 55,89'' 0,06 arcsec source: 15
proper motion (J2000) RA: 0,0054 arcsec/a DEC: -0,267 arcsec/a source: 25
radial velocity -10 km/s source: 25
trigonometric parallax 0,054 0,005 arcsec source: 25
galactic coord. (B1950) longitude: 102,97 latitude: 31,03
GCI unit vector (J2000) X: -0,024133 Y: -0,305594 Z: 0,951856

magnitude:

visual 4,58 (observed) source: 25
photovisual 4,9 source: 2

spectral information:

spectral class F5 source: 96
Morgan-Keenan F5IV-V source: 25
B-magnitude 5 0,05 B-V-magnitude 0,42
U-magnitude 5,01 0,05 U-B-magnitude 0,01

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 30,3 arcsec
magnitude difference between brightest and second brightest component 1,21
position angle 15

component magnitude spectral class catalogue(s)/name(s)
A 4,58 F5 Dsiban, y1Draconis, 31 Dra, HR 6636, HD 162003, SAO 8890
B 5,79 F5 y1Draconis, 31 Dra, HR 6637, HD 162004, SAO 8891

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
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: 17h 42min 49,282sec DEC: +72 10' 26,21'' 0,004 arcsec
position (J2000) RA: 17h 41min 56,365sec DEC: +72 8' 55,93''
proper motion J1950 (FK4) RA: 0,0033 arcsec/a DEC: -0,267 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0056 arcsec/a DEC: -0,267 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 4,9 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class F5
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 670
Durchmusterung BD+72 804
Boss General Catalogue 24089
Henry Draper Catalogue 162003

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

position and proper motion:

position (J2000) RA: 17h 41,9min DEC: +72 9'
proper motion (J2000) RA: 0,025 arcsec/a DEC: -0,267 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 1832 56 15 30,3'' 4,58 5,79 F5IV F8V STF2241
AC 1857 7 128 101,5'' 4,9 11,4 - STF2241
1923 120 89,7''
AD 1905 1 84 100,5'' 4,9 12,9 - STF2241
CD 1908 1 19 67,6'' 11,4 12,9 - STF2241

discoverer information:

discoverer code discoverer reference
STF2241 Struve, F.G.W. -

notes:

note Psi (1) Dra. B is BD+72@805. Proper motion of B +017 -279. A premature orbit has been computed.