y2Draconis

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 y2Dra, 34 Dra, HR 6725, HD 164613, SAO 8961, FK5: 3429
constellation Draco

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


position, motion, parallax:

position (J2000) RA: 17h 55min 11,2sec DEC: +72° 0' 18''
position (J1900) RA: 17h 56min 55sec DEC: +72° 0' 53''
proper motion (J2000) RA: 0,013 arcsec/a DEC: -0,001 arcsec/a
radial velocity -2 km/s
note: spectroscopic binaries
rotational velocity 45 km/s (uncertain) (variable)

magnitude

visual magnitude 5,45
(V on UBV Johnson system)

spectral / color information

spectral class F2-3II-III
B-V-magnitude 0,3
U-B-magnitude 0,15

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

position, motion, parallax:

position (J2000) RA: 17h 55min 11,188sec DEC: +72° 0' 18,47'' ±0,22 arcsec source: 15
proper motion (J2000) RA: 0,0029 arcsec/a DEC: -0,001 arcsec/a source: 25
radial velocity -2 km/s source: 25
galactic coord. (B1950) longitude: 102,68° latitude: 30,03°
GCI unit vector (J2000) X: -0,006488 Y: -0,308864 Z: 0,951084

magnitude:

visual 5,44 (observed) source: 25
photovisual 5,5 source: 2

spectral information:

spectral class F2 source: 96
Morgan-Keenan F2-3II-III source: 25
B-magnitude 5,75 ±0,05 B-V-magnitude 0,31
U-magnitude 5,91 ±0,05 U-B-magnitude 0,16

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 56min 2,907sec DEC: +72° 0' 37,92'' ±0,018 arcsec
position (J2000) RA: 17h 55min 11,125sec DEC: +72° 0' 18,92''
proper motion J1950 (FK4) RA: 0,0002 arcsec/a DEC: 0,003 arcsec/a ±0,003 arcsec/a in RA
±0,003 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0016 arcsec/a DEC: 0,003 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 5,5 (accuracy: 2 decimals)
source of visual magnitude data Taken from Harvard or San Luis photometry.

spectral information:

spectral class F2
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue GC, catalogue number: 24459
Durchmusterung BD+72 818
Boss General Catalogue 24459
Henry Draper Catalogue 164613