Zeta Cassiopeiae
 ζ Cas is found just below α Cas | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cassiopeia |
| Right ascension | 00h 36m 58.2846s[1] |
| Declination | +53° 53′ 48.874″[1] |
| Apparent magnitude (V) | 3.666 [1] |
| Characteristics | |
| Spectral type | B2IV [1] |
| U−B color index | -0.89 [1] |
| B−V color index | -0.19 [1] |
| Variable type | SPB[2] |
| Astrometry | |
| Radial velocity (Rv) | 2.0 [1] km/s |
| Proper motion (μ) | RA: 17.77 [1] mas/yr Dec.: −9.15 [1] mas/yr |
| Parallax (π) | 5.46 ± 0.61 mas[1] |
| Distance | approx. 600 ly (approx. 180 pc) |
| Absolute magnitude (MV) | -2.63 |
| Details | |
| Mass | 9 [2] M☉ |
| Radius | 6.1 [2] R☉ |
| Luminosity | 6,400 [2] L☉ |
| Temperature | 21,000 [2] K |
| Metallicity | ? |
| Rotation | 56 km/s. [2] |
| Age | 2.0×107[2] years |
| Other designations | |
| Database references | |
| SIMBAD | data |
Zeta Cassiopeiae (ζ Cas, ζ Cassiopeiae) is a star in the constellation Cassiopeia. ζ Cassiopeiae is a blue-white B-type subgiant with an apparent magnitude of +3.67. It is approximately 600 light years from Earth.
ζ Cas is a member of an unusual group of variable stars known as "Slowing Pulsating B" (SPB) stars.[3]
See also
- Lists of stars in the constellation Cassiopeiae
- Class B Stars
- Pulsating Variable Stars
References
- ^ a b c d e f g h i j "SIMBAD query result: NSV 225 -- Pulsating variable Star". Centre de Données astronomiques de Strasbourg. Retrieved 2010-02-22.
- ^ a b c d e f g Professor James B. (Jim) Kaler. "ZETA CAS (Zeta Cassiopeiae)". University of Illinois. Retrieved 2010-02-22.
- ^ Neiner, C.; Geers, V. C.; et al. (2003). "Discovery of a magnetic field in the Slowly Pulsating B star zeta Cassiopeiae" (PDF). Astronomy and Astrophysics. 406: 1019–1031. doi:10.1051/0004-6361:20030742. Retrieved 2010-02-22.
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External links
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