d1Lyrae


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 d1Lyr, NSV 11504, 11 Lyr, HR 7131, HD 175426, SAO 67537, FK5: 3506, WDS 18537+3658A
constellation Lyra

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


position, motion, parallax:

position (J2000) RA: 18h 53min 43,6sec DEC: +36 58' 18''
position (J1900) RA: 18h 50min 13,9sec DEC: +36 50' 48''
proper motion (J2000) RA: 0,004 arcsec/a DEC: -0,002 arcsec/a
radial velocity -26 km/s
note: spectroscopic binaries
note: orbital data avaible
rotational velocity 123 km/s (uncertain) (variable)

magnitude

visual magnitude 5,58
(V on UBV Johnson system)

spectral / color information

spectral class B2.5V
B-V-magnitude -0,15
U-B-magnitude -0,66

variability information

variable star identification 11504

double/multiple star system information

separation 174,6 arcsec
mag difference (of double or brightest multiple) 3,7
note Worley (1978) update of the IDS
note (category: spectroscopic binaries): 88.352d, K 39.7k/s, V0 -17.2k/s, asini 44.8.

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

position, motion, parallax:

position (J2000) RA: 18h 53min 43,569sec DEC: +36 58' 18,22'' 0,22 arcsec source: 15
proper motion (J2000) RA: 0,0003 arcsec/a DEC: -0,002 arcsec/a source: 25
radial velocity -26 km/s source: 25
galactic coord. (B1950) longitude: 66,94 latitude: 15,49
GCI unit vector (J2000) X: 0,185579 Y: -0,77708 Z: 0,601421

magnitude:

visual 5,58 (observed) source: 25
photovisual 5,5 source: 2

spectral information:

spectral class B3 source: 96
Morgan-Keenan B2.5V source: 25
B-magnitude 5,43 0,05 B-V-magnitude -0,15
U-magnitude 4,77 0,05 U-B-magnitude -0,66

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 174,6 arcsec
magnitude difference between brightest and second brightest component 3,6
position angle 20

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 51min 58,671sec DEC: +36 54' 29,16'' 0,017 arcsec
position (J2000) RA: 18h 53min 43,564sec DEC: +36 58' 18,11''
proper motion J1950 (FK4) RA: -0,0001 arcsec/a DEC: -0,003 arcsec/a 0,003 arcsec/a in RA
0,003 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0002 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 B3
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue GC, catalogue number: 25934
Durchmusterung BD+36 3307
Boss General Catalogue 25934
Henry Draper Catalogue 175426

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

position and proper motion:

position (J2000) RA: 18h 53,7min DEC: +36 58'
proper motion (J2000) RA: 0,004 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
- 1905 1 20 174,6'' 5,58 9,2 B2.5V H 3

discoverer information:

discoverer code discoverer reference
H 3 Herschel, W. -

notes:

note H VI 3. Delta (1) Lyr. A is a spectroscopic binary. B is BD+36@3308.

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

position:

position (J1950) RA: 18h 51min 58,7sec DEC: +36 54' 29''

variability informations:

magnitute at max. brightness 5,56
magnitute at min. brightness 5,62
photometric system visual, photovisual or Johnson's V

spectral information

spectral class B3

references

to a study 290477D (designation: ZI 1554)
to a chart/photograph 682064

miscanellous

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