g Draconis


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 g Dra, 33 Dra, HR 6705, HD 164058, SAO 30653, FK5: 676, WDS 17566+5129A
constellation Draco

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

note (category: star names): ETAMIN; Etanin; Ettanin; Rastaban; Rasaben; Zenith Star.

object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

position, motion, parallax:

position (J2000) RA: 17h 56min 36,4sec DEC: +51 29' 20''
position (J1900) RA: 17h 54min 17sec DEC: +51 30' 2''
proper motion (J2000) RA: -0,008 arcsec/a DEC: -0,019 arcsec/a
radial velocity -28 km/s
rotational velocity <17 km/s (uncertain) (variable)
trigonometric parallax 0,025 arcsec

magnitude

visual magnitude 2,23
(V on UBV Johnson system)

spectral / color information

spectral class K5III
B-V-magnitude 1,52
U-B-magnitude 1,87
R-I-magnitude 0,85
note (category: spectra): Ultraviolet FeII emission.

variability information

note (category: variability): Amp. 0.08V. He 10830 variable.

double/multiple star system information

number of components of multiple star system 7
separation 140,1 arcsec
mag difference (of double or brightest multiple) 8,4
component ID AG

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

position, motion, parallax:

position (J2000) RA: 17h 56min 36,367sec DEC: +51 29' 20,21'' 0,06 arcsec source: 15
proper motion (J2000) RA: -0,0008 arcsec/a DEC: -0,019 arcsec/a source: 25
radial velocity -28 km/s source: 25
trigonometric parallax 0,025 0,002 arcsec source: 25
galactic coord. (B1950) longitude: 79,06 latitude: 29,22
GCI unit vector (J2000) X: -0,009221 Y: -0,622597 Z: 0,782488

magnitude:

visual 2,23 (observed) source: 25
photovisual 2,4 source: 2

spectral information:

spectral class K5 source: 96
Morgan-Keenan K5III source: 25
B-magnitude 3,75 0,05 B-V-magnitude 1,52
U-magnitude 5,62 0,05 U-B-magnitude 1,87

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 20,9 arcsec
magnitude difference between brightest and second brightest component 11,2
position angle 151

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 55min 26,576sec DEC: +51 29' 38,53'' 0,003 arcsec
position (J2000) RA: 17h 56min 36,375sec DEC: +51 29' 20,26''
proper motion J1950 (FK4) RA: -0,0014 arcsec/a DEC: -0,02 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0007 arcsec/a DEC: -0,019 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

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

spectral information:

spectral class K5
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 676
Durchmusterung BD+51 2282
Boss General Catalogue 24432
Henry Draper Catalogue 164058

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

position and proper motion:

position (J2000) RA: 17h 56,6min DEC: +51 29'
proper motion (J2000) RA: -0,008 arcsec/a DEC: -0,019 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 1878 7 151 20,9'' 2,23 13,4 K5III BU 633
AC 1878 2 227 47,9'' 2,4 12,9 - BU 633
1898 230 45,7''
AD 1878 3 14 56,7'' 2,4 12,9 - BU 633
1915 12 57,6''
AE 1898 3 235 97,5'' 2,4 11,9 - BU 633
1913 - 96,9''
AF 1879 5 116 125,3'' 2,4 11,2 - BU 633
AG 1898 3 28 139,2'' 2,4 11,9 - BU 633
1913 - 140,1''

discoverer information:

discoverer code discoverer reference
BU 633 Burnham, S.W. -

notes:

note Gamma Dra. A is variable.