V2140 Cygni
| catalogues and names |
| The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) |
| SKY2000 - Master Star Catalog |
| Smithsonian Astrophysical Observatory Star Catalog |
catalogues and names
| catalogues and names | V2140 Cyg, HR 8020, HD 199478, SAO 50246, BD +46 3111 |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 20h 55min 49.8sec | DEC: +47° 25' 4'' | ||
| position (B1900) | RA: 20h 52min 27.1sec | DEC: +47° 2' 3'' | ||
| proper motion (J2000) | RA: -0.003 arcsec/a | DEC: -0.002 arcsec/a | ||
| radial velocity | -15 km/s note: variable radial velocity |
|||
| galactic coordinates | longitude: 87.51° | latitude: 1.42° | ||
magnitude
| visual magnitude | 5.67 (V on UBV Johnson system) |
spectral / color information
| spectral class | B8Ia |
| B-V-magnitude | 0.47 |
| U-B-magnitude | -0.33 |
| R-I-magnitude |
variability information
| note (category: variability): | H alpha profile variable. Possibly binary star. |
miscellaneous information
| note (category: group membership): | Cyg OB6; NGC 6991; in reflection nebula IC 5076. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 20h 55min 49.806sec | DEC: +47° 25' 3.66'' | ±0.2 arcsec | source: 52 |
| proper motion (J2000) | RA: -0.0003 arcsec/a | DEC: -0.003 arcsec/a | source: 25 | |
| radial velocity | -15 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 87.52° | latitude: 1.42° | ||
magnitude:
| visual | 5.67 (observed) | source: 25 |
| photovisual | 5.8 | source: 2 |
| photographic | 5.7 | source: 16 |
spectral information:
| spectral class | B8 | source: 96 | |
| Morgan-Keenan | B8Ia | source: 25 | |
| B-magnitude | 6.14 ±0.05 | B-V-magnitude | 0.47 |
| U-magnitude | 5.81 ±0.05 | U-B-magnitude | -0.33 |
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 | |
| 25 | Bright Star Catalogue, 5th edition |
| Hoffleit, D. and Warren, W.H. Jr., The Bright Star Catalogue, 5th Revised Edition, Version 2, 1994 | |
| 52 | PPMN-HP subset |
| PPMN Star Catalogue (Reference 16) High-Precision Subset (Code H) | |
| 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: 20h 54min 8.381sec | DEC: +47° 13' 30.98'' | ±0.029 arcsec |
| position (J2000) | RA: 20h 55min 49.806sec | DEC: +47° 25' 3.78'' | |
| proper motion B1950 (FK4) | RA: -0.0006 arcsec/a | DEC: 0.001 arcsec/a | ±0.005 arcsec/a in RA ±0.004 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0003 arcsec/a | DEC: -0.002 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5.8 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | B8p |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | GC, catalogue number: 29219 |
| Durchmusterung | BD+46 3111 |
| Boss General Catalogue | 29219 |
| Henry Draper Catalogue | 199478 |