y Cygni


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 y Cyg, 24 Cyg, HR 7619, HD 189037, SAO 32114, WDS 19556+5226A
constellation Cygnus

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


position, motion, parallax:

position (J2000) RA: 19h 55min 37,8sec DEC: +52 26' 20''
position (J1900) RA: 19h 53min 2,6sec DEC: +52 10' 24''
proper motion (J2000) RA: -0,037 arcsec/a DEC: -0,03 arcsec/a
radial velocity -10 km/s
note: variable radial velocity
rotational velocity 276 km/s (uncertain) (variable)
trigonometric parallax 0,005 arcsec
note (category: dynamical parallaxes): 0.008".

magnitude

visual magnitude 4,92
(V on UBV Johnson system)

spectral / color information

spectral class A4Vn
B-V-magnitude 0,12
U-B-magnitude 0,06
R-I-magnitude 0,06

double/multiple star system information

number of components of multiple star system 4
separation 3,1 arcsec
mag difference (of double or brightest multiple) 2,3
component ID AB
note (category: double and multiple data): AB combined mag., colors. Sources differ on spectral class of component B from A7V to F4V. vsini of B, 120k/s.

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

position, motion, parallax:

position (J2000) RA: 19h 55min 37,836sec DEC: +52 26' 21,38'' 0,43 arcsec source: 16
proper motion (J2000) RA: -0,003 arcsec/a DEC: -0,006 arcsec/a source: 25
radial velocity -10 km/s source: 25
trigonometric parallax 0,005 - source: 25
galactic coord. (B1950) longitude: 86,11 latitude: 12,21
GCI unit vector (J2000) X: 0,294681 Y: -0,533646 Z: 0,792708

magnitude:

visual 4,92 (observed) source: 25
photovisual 4,8 source: 2
photographic 4,9 source: 16

spectral information:

spectral class A3 source: 96
Morgan-Keenan A4Vn source: 25
B-magnitude 5,04 0,05 B-V-magnitude 0,12
U-magnitude 5,1 0,05 U-B-magnitude 0,06

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 3,1 arcsec
magnitude difference between brightest and second brightest component 2,2
position angle 176

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
16 PPM North and PPM South Catalogs and PPM Supplement
Roser, S., and U. Bastian, "Catalogue of Positions and Proper Motions," A&AS, Vol. 74, p. 449, 1988, and Bastian, U., et al., "Catalogue of Positions and Proper Motions - South," 1993
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: 19h 54min 20,175sec DEC: +52 18' 19,76'' 0,008 arcsec
position (J2000) RA: 19h 55min 37,774sec DEC: +52 26' 20,22''
proper motion J1950 (FK4) RA: -0,0045 arcsec/a DEC: -0,028 arcsec/a 0,002 arcsec/a in RA
0,002 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,004 arcsec/a DEC: -0,03 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 4,8 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class A3
source of spectral data Taken from the HD with M stars reclassified by Miss Cannon.

catalogues

source catalogue FK3, catalogue number: 750
Durchmusterung BD+52 2572
Boss General Catalogue 27618
Henry Draper Catalogue 189037

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

position and proper motion:

position (J2000) RA: 19h 55,6min DEC: +52 26'
proper motion (J2000) RA: -0,036 arcsec/a DEC: -0,03 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 1822 77 185 3,4'' 5 7,2 A4Vn STF2605
1980 176 3,1''
AC 1908 2 55 18,8'' 4,8 13,6 - STF2605
1958 - 21,3''
AD 1880 2 62 163,2'' 4,8 10,2 - STF2605
1908 61 165,4''

discoverer information:

discoverer code discoverer reference
STF2605 Struve, F.G.W. -

notes:

note Psi Cyg.