17 Lyrae
catalogues and names
| catalogues and names | 17 Lyr, HR 7261, HD 178449, SAO 67835, BD +32 3326, WDS 19074+3230A |
| constellation | Lyra |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 19h 7min 25.6sec | DEC: +32° 30' 6'' | ||
| position (B1900) | RA: 19h 3min 38.6sec | DEC: +32° 20' 38'' | ||
| proper motion (J2000) | RA: 0.13 arcsec/a | DEC: 0.023 arcsec/a | ||
| radial velocity | 4 km/s note: spectroscopic binaries, single lined spectra note: orbital data avaible |
|||
| rotational velocity | 127 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.017 arcsec | |||
| galactic coordinates | longitude: 63.91° | latitude: 11.11° | ||
| note (category: dynamical parallaxes): | 0.028". |
magnitude
| visual magnitude | 5.23 (V on UBV Johnson system) |
spectral / color information
| spectral class | F0V |
| B-V-magnitude | 0.34 |
| U-B-magnitude | 0.07 |
double/multiple star system information
| number of components of multiple star system | 10 |
| separation | 3.5 arcsec |
| mag difference (of double or brightest multiple) | 4.3 |
| component ID | AB |
| note (category: double and multiple data): | AB binary. Other companions probably optical. |
| note (category: spectroscopic binaries): | ADS 12061A, 49.09d, K 11.9k/s, V0 -35.2k/s, asini 7.05. Orbit questioned by Morbey and Griffin (1987, ApJ, 317, 343). |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 19h 7min 25.592sec | DEC: +32° 30' 6.53'' | ±0.35 arcsec | source: 17 |
| proper motion (J2000) | RA: 0.0101 arcsec/a | DEC: 0.03 arcsec/a | source: 25 | |
| radial velocity | 4 km/s | source: 25 | ||
| trigonometric parallax | 0.017 arcsec | ±0.002 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 63.91° | latitude: 11.11° | ||
magnitude:
| visual | 5.23 (observed) | source: 25 |
| photovisual | 5 | source: 2 |
| photographic | 5.3 | source: 2 |
spectral information:
| spectral class | F0 | source: 96 | |
| Morgan-Keenan | F0V | source: 25 | |
| B-magnitude | 5.57 ±0.05 | B-V-magnitude | 0.34 |
| U-magnitude | 5.64 ±0.05 | U-B-magnitude | 0.07 |
double/multiple star system information:
| separation between brightest and second brightest component | 3.5 arcsec |
| magnitude difference between brightest and second brightest component | 3.8 |
| position angle | 301 ° |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 5.23 | F0 | 17 Lyr, HR 7261, HD 178449, SAO 67835 |
| B | 8.89 | A2 |
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 | |
| 17 | ACRS |
| Corbin, T.E., and S.E. Urban, Astrographic Catalog Reference Stars, United States Naval Observatory, 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 (B1950) | RA: 19h 5min 32.035sec | DEC: +32° 25' 18.12'' | ±0.014 arcsec |
| position (J2000) | RA: 19h 7min 25.608sec | DEC: +32° 30' 5.93'' | |
| proper motion B1950 (FK4) | RA: 0.01 arcsec/a | DEC: 0.023 arcsec/a | ±0.003 arcsec/a in RA ±0.002 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0102 arcsec/a | DEC: 0.023 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | F0 |
| 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: 26340 |
| Durchmusterung | BD+32 3326 |
| Boss General Catalogue | 26340 |
| Henry Draper Catalogue | 178449 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 19h 7.4min | DEC: +32° 30' |
| proper motion (J2000) | RA: 0.128 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 | 1830 | 48 | 331° | 3.7'' | 5.3 | 9.1 | F0V | STF2461 |
| 1963 | 301° | 3.5'' | ||||||
| AC | 1894 | 13 | 69° | 112.3'' | 5.3 | 10.6 | - | STF2461 |
| 1935 | 61° | 171.7'' | ||||||
| AD | 1887 | 11 | 296° | 124.3'' | 5.3 | 9.2 | - | STF2461 |
| 1959 | 293° | 131.7'' | ||||||
| AE | 1891 | 14 | 116° | 152.4'' | 5.3 | 9.3 | - | STF2461 |
| 1956 | 118° | 140.9'' | ||||||
| AF | 1891 | 10 | 358° | 168.2'' | 5.3 | 8.9 | - | STF2461 |
| 1956 | 354° | 159.7'' | ||||||
| Aa | 1933 | 1 | 50° | 48'' | 5.3 | 11.4 | - | STF2461 |
| CE | 1908 | 4 | 173° | 122.6'' | 10.6 | 9.3 | - | STF2461 |
| 1933 | 186° | 149.7'' | ||||||
| CG | 1908 | 4 | 120° | 130.7'' | 10.6 | 10.6 | - | STF2461 |
| 1933 | 138° | 124.2'' | ||||||
| CH | 1908 | 2 | 29° | 163.1'' | 10.6 | 11.4 | - | STF2461 |
| 1910 | - | 160.1'' | ||||||
| CP | 1936 | 13 | 80° | 0.3'' | 10.6 | 11.4 | - | KUI 90 |
| 1987 | 53° | 0.1'' | ||||||
| CR | 1908 | 2 | 52° | 63.2'' | 10.6 | 12.3 | - | STF2461 |
| 1910 | - | 59.9'' | ||||||
| EG | 1908 | 2 | 60° | 113.7'' | 9.3 | 10.6 | - | STF2461 |
discoverer information:
| discoverer code | discoverer | reference |
| STF2461 | Struve, F.G.W. | - |
| KUI 90 | Kuiper, G.P. | - |
notes:
| note | 17 Lyr. Mt. Wilson spectral type A is A9n. A is a spectroscopic binary. AC: Proper motion of C +1280 +1115. Mt. Wilson spectral type is M3. |