Iota Cephei
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cepheus |
| Right ascension | 22h 49m 40.91s |
| Declination | +66° 12′ 2.6″ |
| Apparent magnitude (V) | 3.50[1] |
| Absolute magnitude (V) | 0.76[1] |
| Distance | 115 ly (35.28 pc) |
| Spectral type | K0 III[1] |
| Other designations | |
Iota Cephei (ι Cep, ι Cep) is a Class K0, third-magnitude star in the constellation Cepheus. Iota Cephei is an orange giant star located about 115 light-years from Earth. This star has 10.05 ± 0.18 times the Sun's radius and about 1.8–2.2 times the mass of the Sun. It is emitting 49.6 ± 2.5 as much luminosity as the Sun, which is being radiated from its outer atmosphere at an effective temperature of 4,831 ± 74 K.[3] Due to precession of the equinoxes, it will become the pole star some time around 5200 CE.
References
- 1 2 3 Hekker, S.; et al. (August 2006), "Precise radial velocities of giant stars. I. Stable stars", Astronomy and Astrophysics 454 (3): 943–949, arXiv:astro-ph/0604502, Bibcode:2006A&A...454..943H, doi:10.1051/0004-6361:20064946
- ↑ "HD 216228 -- Variable Star". SIMBAD Astronomical Database. Retrieved 2007-02-28.
- ↑ Berio, P.; et al. (November 2011), "Chromosphere of K giant stars. Geometrical extent and spatial structure detection", Astronomy & Astrophysics 535: A59, arXiv:1109.5476, Bibcode:2011A&A...535A..59B, doi:10.1051/0004-6361/201117479
External links
| Preceded by Gamma Cephei |
Pole Star 5200–6800 |
Succeeded by Alderamin |
Coordinates: 
22h 49m 40.91s, +66° 12′ 2.6″
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