n Cassiopeiae
catalogues and names
| catalogues and names | n Cas, NSV 00302, 25 Cas, HR 223, HD 4636, SAO 21729, BD +50 147 |
| constellation | Cassiopeia |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 0h 48min 50.1sec | DEC: +50° 58' 6'' | ||
| position (B1900) | RA: 0h 43min 9.8sec | DEC: +50° 25' 22'' | ||
| proper motion (J2000) | RA: 0.035 arcsec/a | DEC: -0.006 arcsec/a | ||
| radial velocity | 9 km/s note: variable radial velocity |
|||
| rotational velocity | 210 km/s (uncertain) (variable) | |||
| galactic coordinates | longitude: 122.51° | latitude: -11.9° | ||
magnitude
| visual magnitude | 4.89 (V on UBV Johnson system) |
spectral / color information
| spectral class | B9III |
| B-V-magnitude | -0.11 |
| U-B-magnitude | -0.42 |
variability information
| variable star identification | 302 |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 0h 48min 50.015sec | DEC: +50° 58' 5.45'' | ±0.35 arcsec | source: 17 |
| proper motion (J2000) | RA: 0.0032 arcsec/a | DEC: -0.009 arcsec/a | source: 25 | |
| radial velocity | 9 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 122.52° | latitude: -11.9° | ||
magnitude:
| visual | 4.89 (observed) | source: 25 |
| photovisual | 5 | source: 2 |
| photographic | 5 | source: 16 |
spectral information:
| spectral class | B9 | source: 96 | |
| Morgan-Keenan | B9III | source: 25 | |
| B-magnitude | 4.78 ±0.05 | B-V-magnitude | -0.11 |
| U-magnitude | 4.36 ±0.05 | U-B-magnitude | -0.42 |
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 | |
| 17 | ACRS |
| Corbin, T.E., and S.E. Urban, Astrographic Catalog Reference Stars, United States Naval Observatory, 1991 | |
| 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 45min 59.27sec | DEC: +50° 41' 45.47'' | ±0.018 arcsec |
| position (J2000) | RA: 0h 48min 50.06sec | DEC: +50° 58' 5.8'' | |
| proper motion B1950 (FK4) | RA: 0.0036 arcsec/a | DEC: -0.001 arcsec/a | ±0.003 arcsec/a in RA ±0.003 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0037 arcsec/a | DEC: -0.006 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | B9 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | GC, catalogue number: 961 |
| Durchmusterung | BD+50 147 |
| Boss General Catalogue | 961 |
| Henry Draper Catalogue | 4636 |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 0h 45min 59.3sec | DEC: +50° 41' 45'' |
variability informations:
| variability type | - |
| magnitute at max. brightness | 4.9 |
| magnitute at min. brightness | |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | B9 |
references
| to a study | 0904D (designation: nu CAS) |