Yed Prior


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

  5. Combined General Catalogue of Variable Stars (suspected variables)


catalogues and names Yed Prior, d Oph, NSV 07556, 1 Oph, HR 6056, HD 146051, SAO 141052, FK5: 603, WDS 16143-0342
other names Yad, Yed, Jed
constellation Ophiuchus

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

note (category: star names): Yed Prior; Yad; Yed; Jed.

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

position, motion, parallax:

position (J2000) RA: 16h 14min 20,7sec DEC: -3 41' 40''
position (J1900) RA: 16h 9min 6,2sec DEC: -3 26' 13''
proper motion (J2000) RA: -0,044 arcsec/a DEC: -0,143 arcsec/a
radial velocity -20 km/s
note: variable radial velocity
trigonometric parallax 0,034 arcsec

magnitude

visual magnitude 2,74
(V on UBV Johnson system)

spectral / color information

spectral class M0.5III
B-V-magnitude 1,58
U-B-magnitude 1,96
R-I-magnitude 1,03
note (category: spectra): Ultraviolet FeII emission.

variability information

variable star identification 7556

double/multiple star system information

separation 65,5 arcsec
mag difference (of double or brightest multiple) 10,4
note Worley (1978) update of the IDS

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

position, motion, parallax:

position (J2000) RA: 16h 14min 20,743sec DEC: -3 41' 39,55'' 0,06 arcsec source: 15
proper motion (J2000) RA: -0,0029 arcsec/a DEC: -0,143 arcsec/a source: 25
radial velocity -20 km/s source: 25
trigonometric parallax 0,034 0,003 arcsec source: 25
galactic coord. (B1950) longitude: 8,85 latitude: 32,2
GCI unit vector (J2000) X: -0,443923 Y: -0,893745 Z: -0,064433

magnitude:

visual 2,74 (observed) source: 25
photovisual 3 source: 2
photographic 4,4 source: 2

spectral information:

spectral class M0 source: 96
Morgan-Keenan M0.5III source: 25
B-magnitude 4,32 0,05 B-V-magnitude 1,58
U-magnitude 6,28 0,05 U-B-magnitude 1,96

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 65,5 arcsec
magnitude difference between brightest and second brightest component 10,7
position angle 294

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 11min 43,325sec DEC: -3 34' 1,41'' 0,003 arcsec
position (J2000) RA: 16h 14min 20,74sec DEC: -3 41' 39,53''
proper motion J1950 (FK4) RA: -0,0032 arcsec/a DEC: -0,145 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,003 arcsec/a DEC: -0,143 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

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

spectral information:

spectral class M0
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 603
Durchmusterung BD-03 3903
Boss General Catalogue 21838
Henry Draper Catalogue 146051

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

position and proper motion:

position (J2000) RA: 16h 14,3min DEC: -3 42'
proper motion (J2000) RA: -0,044 arcsec/a DEC: -0,143 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 1879 2 292 64,6'' 2,74 13,4 M0.5III BUP 164
1908 294 65,5''
AC 1879 1 127 265,7'' 3 10 - BUP 164

discoverer information:

discoverer code discoverer reference
BUP 164 - -

notes:

note Delta Oph.

data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)

position:

position (J1950) RA: 16h 11min 43,3sec DEC: -3 34' 1''

variability informations:

magnitute at max. brightness 2,72
magnitute at min. brightness 2,75
photometric system visual, photovisual or Johnson's V

spectral information

spectral class M1

references

to a study 690730D (designation: 280)