  | |
| Observation data EpochJ2000.0 EquinoxJ2000.0 | |
|---|---|
| Constellation | Corvus |
| Right ascension | 12h 20m 33.64200s[1] |
| Declination | −22° 12′ 57.2410″[1] |
| Apparent magnitude (V) | 5.21[2] |
| Characteristics | |
| Evolutionary stage | Be star |
| Spectral type | B8V[3] |
| U−Bcolor index | −0.39[4] |
| B−Vcolor index | −0.11[4] |
| Astrometry | |
| Radial velocity (Rv) | −6.40 ± 4.2[2] km/s |
| Proper motion (μ) | RA: −108.97[1]mas/yr Dec.: −27.31[1]mas/yr |
| Parallax (π) | 7.85±0.22 mas[1] |
| Distance | 420 ± 10 ly (127 ± 4 pc) |
| Absolute magnitude (MV) | −0.32[5] |
| Details | |
| Mass | 3.39±0.04[6] M☉ |
| Radius | 4.57±0.09[7] R☉ |
| Luminosity | 200[6] L☉ |
| Surface gravity (log g) | 2.26±0.02[7] cgs |
| Temperature | 11,561[6] K |
| Rotational velocity (v sin i) | 259[6] km/s |
| Other designations | |
| 5 Corvi, ζ Crv,ζ Corvi,BD–21° 3514,HD 107348,HIP 60189,HR 4696,SAO 180700 | |
| Database references | |
| SIMBAD | data |
Zeta Corvi,Latinised from ζ Corvi, is astar in theconstellationCorvus. It is ablue-white main-sequence star ofapparent magnitude 5.21. Around 420light-years distant, it shines with aluminosity approximately 154 timesthat of the Sun and has a surface temperature of10,695 K.[8] It is aBe star, the presence of hydrogenemission lines in its spectrum indicating it has a circumstellar disk. It is separated by 7arcminutes from the starHR 4691. The two may be an optical double or a true multiplestar system, with a separation of at least 50,000astronomical units and the stars taking 3.5 million years to orbit each other. HR 4691 is itself double, composed of an ageing yellow-orange giant whosespectral type has been calculated at K0 or G3, and anF-type main-sequence star.[9]
