Yed Posterior


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 Yed Posterior, e Oph, 2 Oph, HR 6075, HD 146791, SAO 141086, FK5: 605, WDS 16183-0442
constellation Ophiuchus

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

note (category: star names): Yed Posterior.

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

position, motion, parallax:

position (J2000) RA: 16h 18min 19,3sec DEC: -4 41' 33''
position (J1900) RA: 16h 13min 1,7sec DEC: -4 26' 56''
proper motion (J2000) RA: 0,085 arcsec/a DEC: 0,041 arcsec/a
radial velocity -10 km/s
note: variable radial velocity
rotational velocity <17 km/s (uncertain) (variable)
trigonometric parallax 0,043 arcsec

magnitude

visual magnitude 3,24
(V on UBV Johnson system)

spectral / color information

spectral class G9.5IIIbFe-0.5
B-V-magnitude 0,96
U-B-magnitude 0,75
R-I-magnitude 0,49
note (category: spectra): Oxygen deficient relative to magnesium.

double/multiple star system information

separation 110,6 arcsec
mag difference (of double or brightest multiple) 9,1
note Worley (1978) update of the IDS

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

position, motion, parallax:

position (J2000) RA: 16h 18min 19,29sec DEC: -4 41' 32,99'' 0,06 arcsec source: 15
proper motion (J2000) RA: 0,0057 arcsec/a DEC: 0,041 arcsec/a source: 25
radial velocity -10 km/s source: 25
trigonometric parallax 0,043 0,004 arcsec source: 25
galactic coord. (B1950) longitude: 8,57 latitude: 30,81
GCI unit vector (J2000) X: -0,427806 Y: -0,900161 Z: -0,081808

magnitude:

visual 3,24 (observed) source: 25
photovisual 3,3 source: 2
photographic 4,3 source: 2

spectral information:

spectral class K0 source: 96
Morgan-Keenan G9.5IIIbFe-0.5 source: 25
B-magnitude 4,2 0,05 B-V-magnitude 0,96
U-magnitude 4,95 0,05 U-B-magnitude 0,75

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 110,6 arcsec
magnitude difference between brightest and second brightest component 9,2
position angle 246

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: 16h 15min 40,348sec DEC: -4 34' 19,57'' 0,004 arcsec
position (J2000) RA: 16h 18min 19,283sec DEC: -4 41' 32,92''
proper motion J1950 (FK4) RA: 0,0054 arcsec/a DEC: 0,039 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0056 arcsec/a DEC: 0,042 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

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

spectral information:

spectral class K0
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 605
Durchmusterung BD-04 4086
Boss General Catalogue 21920
Henry Draper Catalogue 146791

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

position and proper motion:

position (J2000) RA: 16h 18,3min DEC: -4 42'
proper motion (J2000) RA: 0,085 arcsec/a DEC: 0,041 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
- 1913 2 246 110,6'' 3,24 12,4 G9.5IIIb BU 1452

discoverer information:

discoverer code discoverer reference
BU 1452 Burnham, S.W. -

notes:

note Epsilon Oph.