x Cygni
catalogues and names
| catalogues and names | x Cyg, NSV 13518, 62 Cyg, HR 8079, HD 200905, SAO 50424, BD +43 3800, FK5: 792 |
| constellation | Cygnus |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 21h 4min 55.9sec | DEC: +43° 55' 40'' | ||
| position (B1900) | RA: 21h 1min 17.5sec | DEC: +43° 31' 44'' | ||
| proper motion (J2000) | RA: 0.008 arcsec/a | DEC: 0.001 arcsec/a | ||
| radial velocity | -20 km/s note: spectroscopic binaries |
|||
| rotational velocity | <17 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.007 arcsec | |||
| galactic coordinates | longitude: 85.93° | latitude: -2.08° | ||
magnitude
| visual magnitude | 3.72 (V on UBV Johnson system) |
spectral / color information
| spectral class | K4.5Ib-II |
| B-V-magnitude | 1.65 |
| U-B-magnitude | 1.83 |
| R-I-magnitude | |
| IR-note | object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978) |
| note (category: spectra): | Ultraviolet FeII emission. |
variability information
| variable star identification | 13518 |
double/multiple star system information
| note (category: double and multiple data): | 9.1v A2 companion. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 21h 4min 55.864sec | DEC: +43° 55' 40.28'' | ±0.06 arcsec | source: 15 |
| proper motion (J2000) | RA: 0.0008 arcsec/a | DEC: 0.001 arcsec/a | source: 25 | |
| radial velocity | -20 km/s | source: 25 | ||
| trigonometric parallax | 0.007 arcsec | ±0.001 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 85.93° | latitude: -2.08° | ||
magnitude:
| visual | 3.72 (observed) | source: 25 |
| photovisual | 3.9 | source: 2 |
spectral information:
| spectral class | K5 | source: 96 | |
| Morgan-Keenan | K4.5Ib-II | source: 25 | |
| B-magnitude | 5.37 ±0.05 | B-V-magnitude | 1.65 |
| U-magnitude | 7.2 ±0.05 | U-B-magnitude | 1.83 |
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 | |
| 15 | FK5, FK5 Extension and FK5 Supplement |
| Fricke, W., H. Schwan and T. Lederle, "Fifth Fundamental Catalogue (FK5), Part I. The Basic Fundamental Stars," Veroff. Astronomisches Recheninstitut, No. 32, Heidelberg, Germany, 1988, and Fricke, W., H. Schwan, and T.E. Corbin, "Fifth Fundamental Catalogue (FK5), Part II. The FK5 Extension," Veröff. Astronomisches Recheninstitut, No. 33, Heidelberg, Germany, 1991 | |
| 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: 21h 3min 6.589sec | DEC: +43° 43' 39.33'' | ±0.004 arcsec |
| position (J2000) | RA: 21h 4min 55.865sec | DEC: +43° 55' 40.27'' | |
| proper motion B1950 (FK4) | RA: 0.0005 arcsec/a | DEC: 0.004 arcsec/a | ±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0008 arcsec/a | DEC: 0.001 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 3.9 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
| spectral class | K5 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | FK4, catalogue number: 792 |
| Durchmusterung | BD+43 3800 |
| Boss General Catalogue | 29459 |
| Henry Draper Catalogue | 200905 |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 21h 3min 6.6sec | DEC: +43° 43' 39'' |
variability informations:
| magnitute at max. brightness | 3.56: |
| magnitute at min. brightness | 3.79 |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | K5 |
references
| to a study | 140098D (designation: xi CYG) |
miscanellous
| There are notes in the published catalog (Kukarkin et al.(1982)). |