19 Lyn
| 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:
| 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. |