x Cassiopeiae
catalogues and names
| catalogues and names | x Cas, NSV 00260, 19 Cas, HR 179, HD 3901, SAO 21637, BD +49 164, FK5: 2046 |
| constellation | Cassiopeia |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 0h 42min 3.9sec | DEC: +50° 30' 45'' | ||
| position (B1900) | RA: 0h 36min 29sec | DEC: +49° 57' 51'' | ||
| proper motion (J2000) | RA: 0.015 arcsec/a | DEC: -0.005 arcsec/a | ||
| radial velocity | -10 km/s note: spectroscopic binaries, single lined spectra |
|||
| rotational velocity | 211 km/s (uncertain) (variable) | |||
| galactic coordinates | longitude: 121.41° | latitude: -12.33° | ||
magnitude
| visual magnitude | 4.8 (V on UBV Johnson system) |
spectral / color information
| spectral class | B2V |
| B-V-magnitude | -0.11 |
| U-B-magnitude | -0.63 |
| R-I-magnitude |
variability information
| variable star identification | 260 |
double/multiple star system information
| note (category: spectroscopic binaries): | 940.2d, K 11.9, V0 -10.6, asini 141.0. |
miscellaneous information
| note (category: group membership): | Cas-Tau OB1. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 0h 42min 3.855sec | DEC: +50° 30' 45.08'' | ±0.2 arcsec | source: 52 |
| proper motion (J2000) | RA: -0.0005 arcsec/a | DEC: -0.01 arcsec/a | source: 25 | |
| radial velocity | -10 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 121.41° | latitude: -12.33° | ||
magnitude:
| visual | 4.8 (observed) | source: 25 |
| photovisual | 4.9 | source: 2 |
| photographic | 4.7 | source: 16 |
spectral information:
| spectral class | B3 | source: 96 | |
| Morgan-Keenan | B2V | source: 25 | |
| B-magnitude | 4.69 ±0.05 | B-V-magnitude | -0.11 |
| U-magnitude | 4.06 ±0.05 | U-B-magnitude | -0.63 |
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: 0h 39min 15.82sec | DEC: +50° 14' 19.12'' | ±0.018 arcsec |
| position (J2000) | RA: 0h 42min 3.899sec | DEC: +50° 30' 45.08'' | |
| proper motion B1950 (FK4) | RA: 0.0014 arcsec/a | DEC: -0.001 arcsec/a | ±0.003 arcsec/a in RA ±0.003 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0015 arcsec/a | DEC: -0.006 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 | B3 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | GC, catalogue number: 828 |
| Durchmusterung | BD+49 164 |
| Boss General Catalogue | 828 |
| Henry Draper Catalogue | 3901 |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 0h 39min 15.8sec | DEC: +50° 14' 19'' |
variability informations:
| magnitute at max. brightness | 4.77 |
| magnitute at min. brightness | 4.81 |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | B2 |
references
| to a study | 1002D (designation: xi CAS) |