2 Cassiopeiae
catalogues and names
| catalogues and names | NSV 26029, 2 Cas, HR 8822, HD 218753, SAO 35186, BD +58 2552, WDS 23097+5920A |
| constellation | Cassiopeia |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 23h 9min 44.1sec | DEC: +59° 19' 59'' | ||
| position (B1900) | RA: 23h 5min 27.3sec | DEC: +58° 47' 25'' | ||
| proper motion (J2000) | RA: -0.003 arcsec/a | DEC: 0.009 arcsec/a | ||
| radial velocity | -12 km/s note: suspected variable radial velocity |
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| galactic coordinates | longitude: 110.28° | latitude: -1.02° | ||
magnitude
| visual magnitude | 5.7 (V on UBV Johnson system) |
spectral / color information
| spectral class | A5III |
| B-V-magnitude | 0.33 |
| U-B-magnitude | 0.32 |
variability information
| variable star identification | Var? |
| note (category: variability): | ADS 16556A. |
double/multiple star system information
| number of components of multiple star system | 8 |
| separation | 167.2 arcsec |
| mag difference (of double or brightest multiple) | 4.3 |
| component ID | AC |
| note (category: double and multiple data): | C, 8.14V, +0.15(B-V), -0.38(U-B), A, HD 218780. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 23h 9min 44.084sec | DEC: +59° 19' 57.84'' | ±0.2 arcsec | source: 52 |
| proper motion (J2000) | RA: -0.001 arcsec/a | DEC: 0.002 arcsec/a | source: 25 | |
| radial velocity | -12 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 110.29° | latitude: -1.02° | ||
magnitude:
| visual | 5.7 (observed) | source: 25 |
| photovisual | 5.6 | source: 2 |
| photographic | 5.7 | source: 16 |
spectral information:
| spectral class | A3 | source: 96 | |
| Morgan-Keenan | A5III | source: 25 | |
| B-magnitude | 6.03 ±0.05 | B-V-magnitude | 0.33 |
| U-magnitude | 6.35 ±0.05 | U-B-magnitude | 0.32 |
double/multiple star system information:
| separation between brightest and second brightest component | 10.6 arcsec |
| magnitude difference between brightest and second brightest component | 9 |
| position angle | 41 ° |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 5.7 | A3 | 2 Cas, HR 8822, HD 218753, SAO 35186 |
| B | 8.14 | A7 |
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 | |
| 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 7min 35.234sec | DEC: +59° 3' 41.17'' | ±0.094 arcsec |
| position (J2000) | RA: 23h 9min 44.096sec | DEC: +59° 19' 58.53'' | |
| proper motion B1950 (FK4) | RA: -0.0006 arcsec/a | DEC: 0.014 arcsec/a | ±0.003 arcsec/a in RA ±0.024 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0004 arcsec/a | DEC: 0.009 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5.6 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | A3 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
remarks for duplicity and variability
| Double star in Aitken's Double Star Catalogue (Aitken 1932) |
catalogues
| source catalogue | GC, catalogue number: 32272 |
| Durchmusterung | BD+58 2552 |
| Boss General Catalogue | 32272 |
| Henry Draper Catalogue | 218753 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 23h 9.7min | DEC: +59° 20' |
| proper motion (J2000) | RA: 0.001 arcsec/a | DEC: 0.001 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 |
| Aa | 1934 | 1 | 41° | 10.6'' | 5.66 | 14.7 | A5III | KUI 115 |
| Ab | 1934 | 1 | 278° | 28.9'' | 5.66 | 15 | - | KUI 115 |
| AB | 1904 | 2 | 322° | 19.9'' | 5.66 | 13.5 | - | BU 1526 |
| AC | 1824 | 7 | 163° | 167.2'' | 5.66 | 8.14 | - | S 823 |
| AD | 1899 | 2 | 276° | 162.7'' | 5.66 | 8.9 | - | S 823 |
| CD | 1912 | 1 | 310° | 276'' | 8.14 | 9.8 | A | S 823 |
discoverer information:
| discoverer code | discoverer | reference |
| KUI 115 | Kuiper, G.P. | - |
| BU 1526 | Burnham, S.W. | - |
| S 823 | South, J. | - |
notes:
| note | 2 Cas. |