g Ophiuchi

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

catalogues and names g Oph, 62 Oph, HR 6629, HD 161868, SAO 122754, FK5: 668
constellation Ophiuchus

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


position, motion, parallax:

position (J2000) RA: 17h 47min 53,6sec DEC: +2° 42' 26''
position (J1900) RA: 17h 42min 52,6sec DEC: +2° 44' 41''
proper motion (J2000) RA: -0,022 arcsec/a DEC: -0,074 arcsec/a
radial velocity -7 km/s
note: spectroscopic binaries
note: orbital data avaible
rotational velocity 205 km/s (uncertain) (variable)
trigonometric parallax 0,039 arcsec

magnitude

visual magnitude 3,75
(V on UBV Johnson system)

spectral / color information

spectral class A0Vnp
B-V-magnitude 0,04
U-B-magnitude 0,04
R-I-magnitude 0
note (category: spectra): Lambda Boo star, Mg 4481 wk.

double/multiple star system information

note (category: spectroscopic binaries): 2612d, K 1.8k/s, V0 -7.4k/s, asini 51.7.

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

position, motion, parallax:

position (J2000) RA: 17h 47min 53,564sec DEC: +2° 42' 26,19'' ±0,06 arcsec source: 15
proper motion (J2000) RA: -0,0015 arcsec/a DEC: -0,074 arcsec/a source: 25
radial velocity -7 km/s source: 25
trigonometric parallax 0,039 ±0,004 arcsec source: 25
galactic coord. (B1950) longitude: 28,02° latitude: 15,36°
GCI unit vector (J2000) X: -0,052745 Y: -0,99749 Z: 0,047233

magnitude:

visual 3,75 (observed) source: 25
photovisual 3,7 source: 2

spectral information:

spectral class A0 source: 96
Morgan-Keenan A0Vnp source: 25
B-magnitude 3,79 ±0,05 B-V-magnitude 0,04
U-magnitude 3,83 ±0,05 U-B-magnitude 0,04

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
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 45min 23,019sec DEC: +2° 43' 28,28'' ±0,004 arcsec
position (J2000) RA: 17h 47min 53,568sec DEC: +2° 42' 26,19''
proper motion J1950 (FK4) RA: -0,0016 arcsec/a DEC: -0,074 arcsec/a ±0,001 arcsec/a in RA
±0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0014 arcsec/a DEC: -0,074 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 3,7 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class A0
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 668
Durchmusterung BD+02 3403
Boss General Catalogue 24162
Henry Draper Catalogue 161868