9 Cassiopeiae
catalogues and names
| catalogues and names | NSV 15009, 9 Cas, HR 9100, HD 225180, SAO 10954, BD +61 2586, WDS 00042+6217A |
| constellation | Cassiopeia |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 0h 4min 13.6sec | DEC: +62° 17' 16'' | ||
| position (B1900) | RA: 23h 59min 4.5sec | DEC: +61° 43' 51'' | ||
| proper motion (J2000) | RA: -0.004 arcsec/a | DEC: 0.006 arcsec/a | ||
| radial velocity | -18 km/s note: variable radial velocity |
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| galactic coordinates | longitude: 117.47° | latitude: -0.08° | ||
magnitude
| visual magnitude | 5.88 (V on UBV Johnson system) |
spectral / color information
| spectral class | A1III |
| B-V-magnitude | 0.3 |
| U-B-magnitude | 0.29 |
double/multiple star system information
| separation | 246 arcsec |
| mag difference (of double or brightest multiple) | 4 |
| note | Worley (1978) update of the IDS |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 0h 4min 13.537sec | DEC: +62° 17' 15.79'' | ±0.43 arcsec | source: 16 |
| proper motion (J2000) | RA: -0.0017 arcsec/a | DEC: 0.001 arcsec/a | source: 25 | |
| radial velocity | -18 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 117.48° | latitude: -0.08° | ||
magnitude:
| visual | 5.88 (observed) | source: 25 |
| photovisual | 6 | source: 2 |
| photographic | 6 | source: 16 |
spectral information:
| spectral class | A0 | source: 96 | |
| Morgan-Keenan | A1III | source: 25 | |
| B-magnitude | 6.18 ±0.05 | B-V-magnitude | 0.3 |
| U-magnitude | 6.47 ±0.05 | U-B-magnitude | 0.29 |
double/multiple star system information:
| separation between brightest and second brightest component | 246 arcsec |
| magnitude difference between brightest and second brightest component | 4.1 |
| position angle | 196 ° |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 5.88 | A0 | 9 Cas, HR 9100, HD 225180, SAO 10954 |
| B | 8.2 | B7 |
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 | |
| 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 1min 38.273sec | DEC: +62° 0' 34.13'' | ±0.025 arcsec |
| position (J2000) | RA: 0h 4min 13.631sec | DEC: +62° 17' 16.27'' | |
| proper motion B1950 (FK4) | RA: -0.0007 arcsec/a | DEC: 0.012 arcsec/a | ±0.004 arcsec/a in RA ±0.003 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0006 arcsec/a | DEC: 0.006 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 6 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | A0 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | GC, catalogue number: 30 |
| Durchmusterung | BD+61 2586 |
| Boss General Catalogue | 30 |
| Henry Draper Catalogue | 225180 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 0h 4.2min | DEC: +62° 17' |
| proper motion (J2000) | RA: -0.006 arcsec/a | DEC: 0.004 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 |
| - | 1824 | 2 | 196° | 246'' | 5.88 | 10 | A1III | S 838 |
discoverer information:
| discoverer code | discoverer | reference |
| S 838 | South, J. | - |
notes:
| note | 9 Cas. B is BD+61@2585. |