Phi Cassiopeiae
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| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cassiopeia |
| Right ascension | 01h20m04.9s |
| Declination | +58°13′54″ |
| Apparent magnitude (V) | +5.01 |
| Characteristics | |
| Spectral type | F0Ia |
| U−B color index | +0.59 |
| B−V color index | +0.58 |
| Variable type | none |
| Astrometry | |
| Radial velocity (Rv) | −28.39 km/s |
| Proper motion (μ) | RA: −0.59 mas/yr Dec.: −1.59 mas/yr |
| Parallax (π) | 0.27 ± 0.32 mas |
| Distance | 2300 ly (710 pc) |
| Absolute magnitude (MV) | −8.76[1] |
| Details | |
| Mass | 6.3[2] M☉ |
| Radius | 263[2] R☉ |
| Luminosity | 170,000[2] L☉ |
| Surface gravity (log g) | 1.0[1] cgs |
| Temperature | 7,341[1] K |
| Metallicity | -0.24[1] |
| Other designations | |
34 Cassiopeiae, HR 382, HD 7927, BD+57°260, HIP 6242, SAO 22191, GC 1594, ADS 1073, CCDM J01200+5813 | |
| Database references | |
| SIMBAD | data |
Phi Cassiopeiae (φ Cas, φ Cassiopeiae) is a star in the constellation Cassiopeia. φ Cassiopeiae is a binary star with an apparent magnitude of +4.95. The primary component of φ Cas is an F0Ia bright supergiant of magnitude 4.95 and the secondary is a 7.08 magnitude B6 supergiant at 134" distance.[3]
It is approximately 2300 light years from Earth. It appears among the stars of the open cluster NGC 457 at approximately the same distance, but it is unclear whether it is a member of the cluster.[4][2]
References
- ↑ 1.0 1.1 1.2 1.3 Kovtyukh, V. V.; Gorlova, N.; Belik, S. I. (2012). "Accurate luminosities from the oxygen 7771-4 a triplet and the fundamental parameters of F-G supergiants". arXiv:1204.4115v1 [astro-ph.SR].
- ↑ 2.0 2.1 2.2 2.3 Rosenzweig, P.; Anderson, L. (1993). "A determination of the basic atmospheric parameters of Phi Cassiopeiae". The Astrophysical Journal 411: 207. doi:10.1086/172820.
- ↑ Eggleton, P. P.; Tokovinin, A. A. (2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society 389 (2): 869. doi:10.1111/j.1365-2966.2008.13596.x.
- ↑ Zhang, X. B.; Luo, C. Q.; Fu, J. N. (2012). "B-Type Variables in the Young Open Cluster Ngc 457". The Astronomical Journal 144 (3): 86. doi:10.1088/0004-6256/144/3/86.
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