19 Lyn


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 19 Lyn, HR 2783, HD 57102, SAO 26311, WDS 07229+5517B
constellation Lynx

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


position, motion, parallax:

position (J2000) RA: 7h 22min 50,9sec DEC: +55 17' 4''
position (J1900) RA: 7h 14min 41,2sec DEC: +55 28' 22''
proper motion (J2000) RA: 0,004 arcsec/a DEC: -0,024 arcsec/a
radial velocity 10 km/s
note: spectroscopic binaries
rotational velocity 250 km/s (uncertain) (variable)
trigonometric parallax 0,011 arcsec
note (category: dynamical parallaxes): 0.006".

magnitude

visual magnitude 6,53
(original HR magnitude)

spectral / color information

spectral class B9V

double/multiple star system information

number of components of multiple star system 4
separation 15,1 arcsec
mag difference (of double or brightest multiple) 1
component ID AB
note (category: double and multiple data): Binary with HR 2784. Component C, 10.9v at 74".

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

position, motion, parallax:

position (J2000) RA: 7h 22min 50,897sec DEC: +55 17' 4,42'' 1,24 arcsec source: 29
proper motion (J2000) RA: 0,0004 arcsec/a DEC: -0,024 arcsec/a source: 25
radial velocity 10 km/s source: 25
trigonometric parallax 0,011 0,001 arcsec source: 25
galactic coord. (B1950) longitude: 161,96 latitude: 26,36
GCI unit vector (J2000) X: -0,201417 Y: 0,532694 Z: 0,821991

magnitude:

visual 6,53 (observed) source: 25
photovisual 6,5 source: 2
photographic 5,8 source: 16

spectral information:

spectral class A source: 29
Morgan-Keenan B9V source: 25

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 15 arcsec
magnitude difference between brightest and second brightest component 1,1
position angle 315

component magnitude spectral class catalogue(s)/name(s)
A 5,45 B8 19 Lyn, HR 2784, HD 57103, SAO 26312
B 6,53 A 19 Lyn, HR 2783, HD 57102, SAO 26311

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
29 SAOJ2000
SAO on FK5 at J2000, 1989

data from Smithsonian Astrophysical Observatory Star Catalog (SAO Staff 1966; USNO, ADC 1990)

position and proper motion:

position (J1950) RA: 7h 18min 46,483sec DEC: +55 22' 51,68'' 0,026 arcsec
position (J2000) RA: 7h 22min 50,897sec DEC: +55 17' 4,42''
proper motion J1950 (FK4) RA: 0,0005 arcsec/a DEC: -0,026 arcsec/a 0,004 arcsec/a in RA
0,004 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0004 arcsec/a DEC: -0,024 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 6,5 (accuracy: 2 decimals)
source of visual magnitude data Taken from Harvard or San Luis photometry.

spectral information:

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

remarks for duplicity and variability

Double star in Aitken's Double Star Catalogue (Aitken 1932)

catalogues

source catalogue GC, catalogue number: 9799
Durchmusterung BD+55 1192A
Boss General Catalogue 9799
Henry Draper Catalogue 57102

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

position and proper motion:

position (J2000) RA: 7h 22,9min DEC: +55 17'
proper motion (J2000) RA: -0,003 arcsec/a DEC: -0,029 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 1829 36 315 14,8'' 5,45 6,5 B8V B9V STF1062
1985 - 15''
AD 1905 1 3 214,9'' 5,7 8,9 - STF1062
BC 1879 2 287 74,2'' 6,5 10,9 A STF1062

discoverer information:

discoverer code discoverer reference
STF1062 Struve, F.G.W. -

notes:

note 19 Lyn. Both components appear to be spectroscopic binaries.