Nu Cephei
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cepheus |
| Right ascension | 21h 45m 26.925s[1] |
| Declination | +61° 07′ 14.90″[1] |
| Apparent magnitude (V) | 4.312 |
| Characteristics | |
| Spectral type | A2Iab |
| Apparent magnitude (U) | 4.95 |
| Apparent magnitude (B) | 4.740 |
| Apparent magnitude (J) | 3.296 |
| Apparent magnitude (H) | 3.215 |
| Apparent magnitude (K) | 2.942 |
| U−B color index | +0.21 |
| B−V color index | +0.428 |
| Variable type | Alpha Cygni |
| Astrometry | |
| Radial velocity (Rv) | −20.8 km/s |
| Proper motion (μ) | RA: −3.74 ± 0.13[1] mas/yr Dec.: −2.10 ± 0.12[1] mas/yr |
| Parallax (π) | 0.48 ± 0.14[1] mas |
| Distance | approx. 7,000 ly (approx. 2,100 pc) |
| Absolute magnitude (MV) | −6.65 |
| Details | |
| Mass | 15 M☉ |
| Radius | 83.5 R☉ |
| Luminosity | 51,000 L☉ |
| Temperature | 9,500 K |
| Other designations | |
Nu Cephei is a Class A2, fourth-magnitude star in the constellation Cepheus. Nu Cephei is a white pulsating variable star and multiple star system, located about 7000 light-years from Earth.
References
- ↑ 1.0 1.1 1.2 1.3 1.4 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.Vizier catalog entry
- "HD 207260 -- Pulsating variable star". SIMBAD Astronomical Database. Retrieved 2007-03-01.
External links
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