Sulafat


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 Sulafat, g Lyr, NSV 11624, 14 Lyr, HR 7178, HD 176437, SAO 67663, FK5: 713, WDS 18589+3241A
other names Sulaphat
constellation Lyra

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

note (category: star names): Sulafat; Sulaphat.

position, motion, parallax:

position (J2000) RA: 18h 58min 56,6sec DEC: +32 41' 22''
position (J1900) RA: 18h 55min 12,1sec DEC: +32 33' 8''
proper motion (J2000) RA: -0,002 arcsec/a DEC: 0,002 arcsec/a
radial velocity -21 km/s
note: variable radial velocity
rotational velocity 76 km/s (uncertain) (variable)
trigonometric parallax 0,021 arcsec

magnitude

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

spectral / color information

spectral class B9III
B-V-magnitude -0,05
U-B-magnitude -0,09
R-I-magnitude -0,01

variability information

variable star identification 11624

double/multiple star system information

number of components of multiple star system 4
separation 176,9 arcsec
mag difference (of double or brightest multiple) 8,3
component ID AC
note (category: double and multiple data): B, 12.1v at 13", optical.

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

position, motion, parallax:

position (J2000) RA: 18h 58min 56,621sec DEC: +32 41' 22,42'' 0,06 arcsec source: 15
proper motion (J2000) RA: -0,0002 arcsec/a DEC: 0,002 arcsec/a source: 25
radial velocity -21 km/s source: 25
trigonometric parallax 0,021 0,002 arcsec source: 25
galactic coord. (B1950) longitude: 63,32 latitude: 12,81
GCI unit vector (J2000) X: 0,214075 Y: -0,813927 Z: 0,540087

magnitude:

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

spectral information:

spectral class A0 source: 96
Morgan-Keenan B9III source: 25
B-magnitude 3,19 0,05 B-V-magnitude -0,05
U-magnitude 3,1 0,05 U-B-magnitude -0,09

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 13,4 arcsec
magnitude difference between brightest and second brightest component 8,9
position angle 304

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: 18h 57min 4,294sec DEC: +32 37' 11,26'' 0,004 arcsec
position (J2000) RA: 18h 58min 56,614sec DEC: +32 41' 22,32''
proper motion J1950 (FK4) RA: -0,0005 arcsec/a DEC: 0,002 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0003 arcsec/a DEC: 0,001 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 A0p
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 713
Durchmusterung BD+32 3286
Boss General Catalogue 26086
Henry Draper Catalogue 176437

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

position and proper motion:

position (J2000) RA: 18h 58,9min DEC: +32 41'
proper motion (J2000) RA: -0,002 arcsec/a DEC: 0,002 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 1868 10 296 13,8'' 3,24 12,1 B9III AGC 9
1958 304 13,4''
AC 1879 2 21 176,9'' 3,3 10,6 - AGC 9

discoverer information:

discoverer code discoverer reference
AGC 9 - -

notes:

note Gamma Lyr. Variable?

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

position:

position (J1950) RA: 18h 57min 4,3sec DEC: +32 37' 11''

variability informations:

magnitute at max. brightness 3,23
magnitute at min. brightness 3,26
photometric system visual, photovisual or Johnson's V

spectral information

spectral class B9

references

to a study 152261D (designation: GAMMA LYR)

miscanellous

There are notes in the published catalog (Kukarkin et al.(1982)).