55 Cassiopeiae
catalogues and names
| catalogues and names | NSV 00753, 55 Cas, HR 640, HD 13474, SAO 12180, BD +65 239, FK5: 76, WDS 02145+6631 |
| constellation | Cassiopeia |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 2h 14min 29.1sec | DEC: +66° 31' 28'' | ||
| position (B1900) | RA: 2h 6min 37.7sec | DEC: +66° 3' 21'' | ||
| proper motion (J2000) | RA: -0.006 arcsec/a | DEC: -0.006 arcsec/a | ||
| radial velocity | -12 km/s note: variable radial velocity |
|||
| rotational velocity | 70 km/s (uncertain) (variable) | |||
| galactic coordinates | longitude: 131.08° | latitude: 4.98° | ||
magnitude
| visual magnitude | 6.07 (V on UBV Johnson system) |
spectral / color information
| spectral class | G0II-III+B9V |
| B-V-magnitude | 0.63 |
| U-B-magnitude | 0.33 |
| note (category: spectra): | vsini of G0 component, 70k/s; of B9 component 85k/s. |
variability information
| variable star identification | 753 |
double/multiple star system information
| note (category: double and multiple data): | Resolved by speckle interferometry 1983.93, sep. 0.07". |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 2h 14min 29.067sec | DEC: +66° 31' 28.02'' | ±0.06 arcsec | source: 15 |
| proper motion (J2000) | RA: -0.001 arcsec/a | DEC: -0.006 arcsec/a | source: 25 | |
| radial velocity | -12 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 131.09° | latitude: 4.98° | ||
magnitude:
| visual | 6.07 (observed) | source: 25 |
| photovisual | 6.2 | source: 2 |
spectral information:
| spectral class | A2 | source: 96 | |
| Morgan-Keenan | G0II-III+B9V | source: 25 | |
| B-magnitude | 6.7 ±0.05 | B-V-magnitude | 0.63 |
| U-magnitude | 7.03 ±0.05 | U-B-magnitude | 0.33 |
double/multiple star system information:
| separation between brightest and second brightest component | 0.1 arcsec |
| position angle | 180 ° |
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 | |
| 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: 2h 10min 31.757sec | DEC: +66° 17' 29.32'' | ±0.005 arcsec |
| position (J2000) | RA: 2h 14min 29.043sec | DEC: +66° 31' 28.12'' | |
| proper motion B1950 (FK4) | RA: -0.001 arcsec/a | DEC: 0.001 arcsec/a | ±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0013 arcsec/a | DEC: -0.005 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 6.1 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
| spectral class | +++ |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | FK4, catalogue number: 76 |
| Durchmusterung | BD+65 239 |
| Boss General Catalogue | 2661 |
| Henry Draper Catalogue | 13474 The "SAO Catalog" entry refers to two consecutive HD numbers, the lower of which is given. |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 2h 14.5min | DEC: +66° 31' |
| proper motion (J2000) | RA: -0.006 arcsec/a | DEC: -0.006 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 |
| - | 1980 | 11 | 9° | 0.1'' | 6.07 | - | - | MCA 6 |
| 1991 | 180° | - |
discoverer information:
| discoverer code | discoverer | reference |
| MCA 6 | McAlister, H.A. | (Astrophys. J. Suppl. 48, 273; 1982.) |
notes:
| note | 55 Cas. Spectrum composite; B9V+G0II-III. |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 2h 10min 31.8sec | DEC: +66° 17' 29'' |
variability informations:
| variability type | CST: |
| magnitute at max. brightness | 6.1 |
| magnitute at min. brightness | |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | * |
references
| to a study | 261232D (designation: 55 CAS) |
miscanellous
| There are notes in the published catalog (Kukarkin et al.(1982)). |
variability type description
| variability type | description |
| CST |
Nonvariable stars, formerly suspected to be variable and hastily designated. Further observations have not confirmed their variability. |