| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cepheus |
| Right ascension | 21h59m 14.96580s[1] |
| Declination | +73° 10′ 47.6148″[1] |
| Apparent magnitude (V) | 5.036[2] |
| Characteristics | |
| Spectral type | F5V[3] |
| B−V color index | 0.41[4] |
| Astrometry | |
| Radial velocity (Rv) | −20.6±0.4[5] km/s |
| Proper motion (μ) | RA: −67.590[1] mas/yr Dec.: −159.571[1] mas/yr |
| Parallax (π) | 27.4199 ± 0.1239 mas[1] |
| Distance | 118.9 ± 0.5 ly (36.5 ± 0.2 pc) |
| Absolute magnitude (MV) | 2.17[6] |
| Details | |
| Mass | 1.38[7] M☉ |
| Radius | 2.77[1] R☉ |
| Luminosity | 11[1] L☉ |
| Surface gravity (log g) | 3.87[4] cgs |
| Temperature | 6,238[4] K |
| Metallicity | −0.36[6] |
| Rotational velocity (v sin i) | 26.4[4] km/s |
| Age | 2[8] Gyr |
| Other designations | |
16 Cep, BD+72° 1009, GC 30800, HD 209369, HIP 108535, HR 8400, SAO 10216[9] | |
| Database references | |
| SIMBAD | data |
16 Cephei is a single[10] star located about 119 light years away from the Sun in the constellationofCepheus. It is visible to the naked eye as a faint, yellow-white hued star with an apparent visual magnitude of 5.036.[2] The star has a relatively high proper motion, traversing the celestial sphere at the rate of 0.174 arc seconds per annum.[11] It is moving closer to the Earth with a heliocentric radial velocity of −21 km/s.[5]
This is an ordinary F-type main-sequence star, somewhat hotter than the sun, with a stellar classification of F5 V.[3] It is around two[8] billion years old with a projected rotational velocity of 26.4 km/s.[4] The star has 1.38[7] times the mass of the Sun and 2.77[1] times the Sun's radius. It is radiating 11[1] times the luminosity of the Sun from its photosphere at an effective temperature of 6,238 K.[4] The star is a source of X-ray emission.[12]
There are several 11th and 12th magnitude stars within a few arc-minutes of 16 Cephei, all of them distant background objects.[1] Only one of these is listed in the Washington Double Star Catalog and Catalog of Components of Double and Multiple Stars as a companion.[13]
|
| |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| |||||||||||||
| Stars |
| ||||||||||||
| |||||||||||||
| Star clusters |
| ||||||||||||
| Nebulae |
| ||||||||||||
| Galaxies |
| ||||||||||||
