V0337 Cephei
catalogues and names
| catalogues and names | V0337 Cep, 9 Cep, HR 8279, HD 206165, SAO 19541, BD +61 2169, FK5: 3725 |
| constellation | Cepheus |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 21h 37min 55.2sec | DEC: +62° 4' 55'' | ||
| position (2000.72) | RA: 21h 37min 56sec | DEC: +62° 5' 7'' | ||
| position (B1900) | RA: 21h 35min 14.2sec | DEC: +61° 37' 51'' | ||
| proper motion (J2000) | RA: -0.003 arcsec/a | DEC: -0.002 arcsec/a | ||
| radial velocity | -13 km/s note: suspected variable radial velocity |
|||
| rotational velocity | 36 km/s (uncertain) (variable) | |||
| trigonometric parallax | -0.008 arcsec | |||
| galactic coordinates | longitude: 102.27° | latitude: 7.25° | ||
magnitude
| visual magnitude | 4.73 (V on UBV Johnson system) |
spectral / color information
| spectral class | B2Ib |
| B-V-magnitude | 0.3 |
| U-B-magnitude | -0.53 |
| R-I-magnitude |
variability information
| variable star identification | V337 Cep |
| note (category: variability): | Alpha Cyg 4.69 - 4.78V. H alpha profile var. |
miscellaneous information
| note (category: group membership): | Cep OB2. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 21h 37min 55.218sec | DEC: +62° 4' 55.07'' | ±0.22 arcsec | source: 15 |
| position (2000.72) | RA: 21h 37min 56sec | DEC: +62° 5' 7'' | JD: 2451809.25 | |
| proper motion (J2000) | RA: -0.0004 arcsec/a | DEC: -0.001 arcsec/a | source: 25 | |
| radial velocity | -13 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 102.28° | latitude: 7.25° | ||
magnitude:
| visual | 4.7 (observed) | source: 31 |
| photovisual | 4.9 | source: 2 |
spectral information:
| spectral class | B2 | source: 96 | |
| Morgan-Keenan | B2Ib | source: 25 | |
| B-magnitude | 5.03 ±0.05 | B-V-magnitude | 0.3 |
| U-magnitude | 4.5 ±0.05 | U-B-magnitude | -0.53 |
variability information:
| variability type | 133 |
| var. amplitude | 0.09 |
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 | |
| 30 | GCVS, 4th edition |
| Kholopov, P.N., et al., General Catalogue of Variable Stars, fourth edition, Moscow: Nauka Publishing House, 1985-88 | |
| 31 | CRM' (non-GCVS variable data) |
| Warren, W.H. Jr., Northern Hemisphere Catalog of Red Magnitudes, 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 36min 34.67sec | DEC: +61° 51' 21.33'' | ±0.013 arcsec |
| position (2000.72) | RA: 21h 37min 57sec | DEC: +62° 5' 7'' | JD: 2451809.25 |
| position (J2000) | RA: 21h 37min 55.245sec | DEC: +62° 4' 54.97'' | |
| proper motion B1950 (FK4) | RA: -0.0005 arcsec/a | DEC: 0.001 arcsec/a | ±0.003 arcsec/a in RA ±0.002 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0002 arcsec/a | DEC: -0.004 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 4.9 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | B2p |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | GC, catalogue number: 30302 |
| Durchmusterung | BD+61 2169 |
| Boss General Catalogue | 30302 |
| Henry Draper Catalogue | 206165 |
data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 21h 36min 34.7sec | DEC: +61° 51' 21'' |
variability informations:
| variability type | ACYG | pulsating variable star |
| magnitute at max. brightness | 4.69 | |
| magnitute at min. brightness | 4.78 | |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | B2Ib |
references
| to a study | Vol. I GCVS (see Kholopov et al. 1985-1988) |
| to a chart/photograph | no chart is avaible, but the star is contained in the 'Bonner Durchmusterung' |
miscanellous
| ID in the GCVS catalogue | 20/337 |
| constellation | Cepheus |
| notes on existence | The star is equivalent to '0200338 V0338'. |
variability type description
| variability type | description |
| ACYG | Variables of the Alpha Cygni type, which are nonradially pulsating supergiants of Bep-AepIa spectral types. The light changes with amplitudes of the order of 0.1 mag often seem irregular, being caused by the superposition of many oscillations with close periods. Cycles from several days to several weeks are observed. |