16 Lyrae
catalogues and names
| catalogues and names | NSV 11677, 16 Lyr, HR 7215, HD 177196, SAO 48011, BD +46 2602, WDS 19014+4656 |
| constellation | Lyra |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 19h 1min 26.4sec | DEC: +46° 56' 5'' | ||
| position (B1900) | RA: 18h 58min 36.5sec | DEC: +46° 47' 35'' | ||
| proper motion (J2000) | RA: 0.02 arcsec/a | DEC: -0.084 arcsec/a | ||
| radial velocity | 8 km/s note: variable radial velocity |
|||
| rotational velocity | 121 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.036 arcsec | |||
| galactic coordinates | longitude: 77.15° | latitude: 17.86° | ||
magnitude
| visual magnitude | 5.01 (V on UBV Johnson system) |
spectral / color information
| spectral class | A7V |
| B-V-magnitude | 0.19 |
| U-B-magnitude | 0.08 |
| R-I-magnitude |
variability information
| variable star identification | 11677 |
double/multiple star system information
| number of components of multiple star system | 3 |
| separation | 200 arcsec |
| mag difference (of double or brightest multiple) | 6.3 |
| component ID | AC |
| note (category: double and multiple data): | B, 10v at 44" optical. |
miscellaneous information
| note (category: group membership): | UMa stream. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 19h 1min 26.389sec | DEC: +46° 56' 5.27'' | ±0.35 arcsec | source: 17 |
| proper motion (J2000) | RA: 0.0022 arcsec/a | DEC: -0.087 arcsec/a | source: 25 | |
| radial velocity | 8 km/s | source: 25 | ||
| trigonometric parallax | 0.036 arcsec | ±0.004 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 77.15° | latitude: 17.86° | ||
magnitude:
| visual | 5.01 (observed) | source: 25 |
| photovisual | 5.1 | source: 2 |
| photographic | 5.2 | source: 16 |
spectral information:
| spectral class | A5 | source: 96 | |
| Morgan-Keenan | A7V | source: 25 | |
| B-magnitude | 5.2 ±0.05 | B-V-magnitude | 0.19 |
| U-magnitude | 5.28 ±0.05 | U-B-magnitude | 0.08 |
double/multiple star system information:
| separation between brightest and second brightest component | 43.7 arcsec |
| magnitude difference between brightest and second brightest component | 5.6 |
| position angle | 281 ° |
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 | |
| 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 0min 1.391sec | DEC: +46° 51' 46.95'' | ±0.022 arcsec |
| position (J2000) | RA: 19h 1min 26.372sec | DEC: +46° 56' 5.25'' | |
| proper motion B1950 (FK4) | RA: 0.0014 arcsec/a | DEC: -0.083 arcsec/a | ±0.004 arcsec/a in RA ±0.003 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0019 arcsec/a | DEC: -0.084 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5.1 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | A5 |
| 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: 26181 |
| Durchmusterung | BD+46 2602 |
| Boss General Catalogue | 26181 |
| Henry Draper Catalogue | 177196 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 19h 1.4min | DEC: +46° 56' |
| proper motion (J2000) | RA: 0.022 arcsec/a | DEC: -0.087 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 |
| - | 1879 | 5 | 276° | 41.9'' | 5.01 | 10.6 | A7V | HJ 1362 |
| 1925 | 281° | 43.7'' |
discoverer information:
| discoverer code | discoverer | reference |
| HJ 1362 | Herschel, J. | - |
notes:
| note | 16 Lyr. |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 19h 0min 1.4sec | DEC: +46° 51' 47'' |
variability informations:
| magnitute at max. brightness | 5 |
| magnitute at min. brightness | 5.09 |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | A7 |
references
| to a study | 730774D (designation: 16164) |
miscanellous
| There are notes in the published catalog (Kukarkin et al.(1982)). |