AR Cassiopeiae
catalogues and names
| catalogues and names | AR Cas, HR 8926, HD 221253, SAO 35478, BD +57 2748, WDS 23300+5833A |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 23h 30min 2sec | DEC: +58° 32' 56'' | ||
| position (B1900) | RA: 23h 25min 24.6sec | DEC: +57° 59' 51'' | ||
| proper motion (J2000) | RA: 0.02 arcsec/a | DEC: 0.005 arcsec/a | ||
| radial velocity | -13 km/s note: spectroscopic binaries, single lined spectra note: orbital data avaible |
|||
| rotational velocity | 144 km/s (uncertain) (variable) | |||
| dynamical parallax | 0.006 arcsec | |||
| galactic coordinates | longitude: 112.47° | latitude: -2.66° | ||
| note (category: dynamical parallaxes): | 0.003" for components CD. |
magnitude
| visual magnitude | 4.91 (V on UBV Johnson system) |
spectral / color information
| spectral class | B3IV |
| B-V-magnitude | -0.12 |
| U-B-magnitude | -0.64 |
| R-I-magnitude |
variability information
| variable star identification | AR Cas |
| note (category: variability): | ADS 16795A, EA 4.84 - 4.98V, 6.0663309d; i 90d. |
double/multiple star system information
| number of components of multiple star system | 8 |
| separation | 75.7 arcsec |
| mag difference (of double or brightest multiple) | 2.3 |
| component ID | AC |
| note (category: double and multiple data): | AB, 4.9, 9.3V, 1500y, sep. 1.1". CD, 8.2 A0Vn, 9.8v, sep. 1.6"; vsini of C, 210k/s. Component E, optical. |
| note (category: spectroscopic binaries): | ADS 16795A, 6.0663d, K 56.7k/s, V0 -13.4k/s, asini 4.58. Alternate orbits 6.0663309d, K 54.18k/s, V0 -10.10k/s, asini 4.44; 6.0668d, K 56.2k/s, V0 -11.0k/s, asini 4.6027. Apsidal period 1500 1800y. |
miscellaneous information
| note (category: group membership): | Cas-Tau OB1. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 23h 30min 1.924sec | DEC: +58° 32' 56.07'' | ±0.2 arcsec | source: 52 |
| proper motion (J2000) | RA: 0.0021 arcsec/a | DEC: 0.002 arcsec/a | source: 25 | |
| radial velocity | -13 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 112.47° | latitude: -2.66° | ||
magnitude:
| visual | 4.8 (observed) | source: 31 |
| photovisual | 4.9 | source: 2 |
| photographic | 4.7 | source: 16 |
spectral information:
| spectral class | B3 | source: 96 | |
| Morgan-Keenan | B3IV | source: 25 | |
| B-magnitude | 4.79 ±0.05 | B-V-magnitude | -0.12 |
| U-magnitude | 4.15 ±0.05 | U-B-magnitude | -0.64 |
variability information:
| variability type | 10 |
| var. amplitude | 0.14 |
| var. period | 6.07 |
| var. epoch | 2435793 15. November 1956, 12:00:00 UT |
| next max light | 2452224.49 10. November 2001, 23:45:36 UT |
double/multiple star system information:
| separation between brightest and second brightest component | 0.9 arcsec |
| magnitude difference between brightest and second brightest component | 4.4 |
| position angle | 340 ° |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 4.8 | B3 | HR 8926, HD 221253, SAO 35478 |
| B | 7.08 | A0 |
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 | |
| 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 | |
| 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 | |
| 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: 23h 27min 42.774sec | DEC: +58° 16' 23.3'' | ±0.015 arcsec |
| position (J2000) | RA: 23h 30min 1.965sec | DEC: +58° 32' 56.28'' | |
| proper motion B1950 (FK4) | RA: 0.0024 arcsec/a | DEC: 0.01 arcsec/a | ±0.003 arcsec/a in RA ±0.002 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0026 arcsec/a | DEC: 0.005 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 4.9 (accuracy: 1 decimal) |
| source of visual magnitude data | Source cited in source catalog introduction. |
spectral information:
| spectral class | B3 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
remarks for duplicity and variability
| Variable star in visual magnitude in source catalog |
catalogues
| source catalogue | GC, catalogue number: 32683 |
| Durchmusterung | BD+57 2748 |
| Boss General Catalogue | 32683 |
| Henry Draper Catalogue | 221253 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 23h 30min | DEC: +58° 33' |
| proper motion (J2000) | RA: 0.02 arcsec/a | DEC: 0.007 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 |
| AB | 1851 | 9 | 340° | 1.5'' | 4.9 | 9.3 | B3IV | STT 496 |
| 1970 | - | 0.9'' | ||||||
| AC | 1841 | 13 | 269° | 75.7'' | 4.9 | 7.1 | - | SHJ 355 |
| AE | 1870 | 6 | 115° | 43.3'' | 4.9 | 11.28 | - | HJ 1888 |
| 1930 | - | 42.4'' | ||||||
| AF | 1870 | 4 | 338° | 67.2'' | 4.9 | 11.06 | - | HJ 1888 |
| AG | 1914 | 2 | 348° | 67'' | 4.9 | 11.11 | - | HJ 1888 |
| CD | 1841 | 35 | 227° | 1.4'' | 7.1 | 8.9 | A1V | DA 2 |
| 1991 | 215° | - | ||||||
| CH | 1841 | 2 | 341° | 23.4'' | 7.1 | 12.9 | - | HJ 1886 |
| 1880 | 337° | 26.9'' | ||||||
| FG | 1870 | 10 | 74° | 10.6'' | 8.9 | 9.1 | - | HJ 1887 |
discoverer information:
| discoverer code | discoverer | reference |
| STT 496 | Struve, O. | - |
| SHJ 355 | South & Herschel | - |
| HJ 1888 | Herschel, J. | - |
| DA 2 | Dawes, W.R. | - |
| HJ 1886 | Herschel, J. | - |
| HJ 1887 | Herschel, J. | - |
notes:
| note | AB: BDS 12349. H VI 25 same star. A is the Algol-type system AR Cas. |
data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 23h 27min 42.8sec | DEC: +58° 16' 23'' |
variability informations:
| variability type | EA/DM | close binary eclipsing system |
| magnitute at max. brightness | 4.82 | |
| magnitute at min. brightness | 4.96 | |
| photometric system | visual, photovisual or Johnson's V | |
| epoch for maximum light [JD] | 2435792.8948 15. November 1956, 09:28:31 UT |
|
| period [d] | 6.0663309 | |
| next maximum light [JD] | 2452220.5188772 7. November 2001, 00:27:11 UT |
|
| duration of the eclipse | 06 % of period the duration of the light constancy phase at minimum light is equal to zero |
spectral information
| spectral class | B3IV-V |
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 | 18/71 |
| constellation | Cassiopeia |
| notes on existence | The star is equivalent to '0180072 AS'. |
| There are notes in published catalog. | |
variability type description
| variability type | description |
| EA | Eclipsing binary systems. These are binary systems with orbital planes so close to the observer's line of sight (the inclination i of the orbital plane to the plane orthogonal to the line of sight is close to 90 deg) that the components periodically eclipse each other. Consequently, the observer finds changes of the apparent combined brightness of the system with the period coincident with that of the components' orbital motion. EA Algol (Beta Persei)-type eclipsing systems. Binaries with spherical or slightly ellipsoidal components. It is possible to specify, for their light curves, the moments of the beginning and end of the eclipses. Between eclipses the light remains almost constant or varies insignificantly because of reflection effects, slight ellipsoidality of components, or physical variations. Secondary minima may be absent. An extremely wide range of periods is observed, from 0.2 to >= 10000 days. Light amplitudes are also quite different and may reach several magnitudes. EB Beta Lyrae-type eclipsing systems. These are eclipsing systems having ellipsoidal components and light curves for which it is impossible to specify the exact times of onset and end of eclipses because of a continuous change of a system's apparent combined brightness between eclipses; secondary minimum is observed in all cases, its depth usually being considerably smaller than that of the primary minimum; periods are mainly longer than 1 day. The components generally belong to early spectral types (B-A). Light amplitudes are usually <2 mag in V. EW W Ursae Majoris-type eclipsing variables. These are eclipsers with periods shorter than 1 days, consisting of ellipsoidal components almost in contact and having light curves for which it is impossible to specify the exact times of onset and end of eclipses. The depths of the primary and secondary minima are almost equal or differ insignificantly. Light amplitudes are usually <0.8 mag in V. The components generally belong to spectral types F-G and later. |
| DM | Detached main-sequence systems. Both components are main-sequence stars and do not fill their inner Roche lobes. |