k Cassiopeiae
catalogues and names
| catalogues and names | k Cas, kap Cas, 15 Cas, HR 130, HD 2905, SAO 11256, BD +62 102, FK5: 16 |
| constellation | Cassiopeia |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 0h 33min 0sec | DEC: +62° 55' 54'' | ||
| position (B1900) | RA: 0h 27min 18.6sec | DEC: +62° 22' 48'' | ||
| proper motion (J2000) | RA: 0.003 arcsec/a | DEC: -0.003 arcsec/a | ||
| radial velocity | -2 km/s note: spectroscopic binaries |
|||
| rotational velocity | 62 km/s (uncertain) (variable) | |||
| galactic coordinates | longitude: 120.84° | latitude: 0.14° | ||
magnitude
| visual magnitude | 4.16 (V on UBV Johnson system) |
spectral / color information
| spectral class | B1Ia |
| B-V-magnitude | 0.14 |
| U-B-magnitude | -0.8 |
| R-I-magnitude |
variability information
| variable star identification | Kap Cas |
| note (category: variability): | Alpha Cyg, 4.22 - 4.30B, 0.09028d. |
double/multiple star system information
| note (category: spectroscopic binaries): | 0.14035d, strongly modulated. |
miscellaneous information
| note (category: group membership): | Cas OB14. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 0h 32min 59.982sec | DEC: +62° 55' 54.4'' | ±0.06 arcsec | source: 15 |
| proper motion (J2000) | RA: 0.0004 arcsec/a | DEC: -0.003 arcsec/a | source: 25 | |
| radial velocity | -2 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 120.84° | latitude: 0.14° | ||
magnitude:
| visual | 4.16 (observed) | source: 25 |
| photovisual | 4.2 | source: 2 |
spectral information:
| spectral class | B0 | source: 96 | |
| Morgan-Keenan | B1Ia | source: 25 | |
| B-magnitude | 4.3 ±0.05 | B-V-magnitude | 0.14 |
| U-magnitude | 3.5 ±0.05 | U-B-magnitude | -0.8 |
variability information:
| variability type | 133 |
| var. amplitude | 0.08 |
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 | |
| 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: 0h 30min 8.341sec | DEC: +62° 39' 22.13'' | ±0.004 arcsec |
| position (J2000) | RA: 0h 32min 59.965sec | DEC: +62° 55' 54.4'' | |
| proper motion B1950 (FK4) | RA: 0.0002 arcsec/a | DEC: 0.003 arcsec/a | ±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0002 arcsec/a | DEC: -0.003 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 4.2 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
| spectral class | B0 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | FK4, catalogue number: 16 |
| Durchmusterung | BD+62 102 |
| Boss General Catalogue | 645 |
| Henry Draper Catalogue | 2905 |
data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 0h 30min 8.3sec | DEC: +62° 39' 22'' |
variability informations:
| variability type | ACYG | pulsating variable star |
| magnitute at max. brightness | 4.22 | |
| magnitute at min. brightness | 4.3 | |
| photometric system |
spectral information
| spectral class | B1eaIa |
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 | 18/9010 |
| constellation | Cassiopeia |
| notes on existence | The star is equivalent to '0189015 omi'. |
| There are notes in published catalog. | |
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. |