Zeta Doradus
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Dorado |
| ζ Dor A | |
| Right ascension | 05h 05m 30.65618s |
| Declination | −57° 28′ 21.7289″ |
| Apparent magnitude (V) | 4.708 |
| ζ Dor B | |
| Right ascension | 05h 05m 47.37235s |
| Declination | −57° 33′ 13.7974″ |
| Apparent magnitude (V) | 8.932 |
| Characteristics | |
| ζ Dor A | |
| Spectral type | F7V |
| B−V color index | 0.526±0.011 |
| ζ Dor B | |
| Spectral type | K7V |
| B−V color index | 1.386±0.012 |
| Astrometry | |
| ζ Dor A | |
| Radial velocity (Rv) | −1.15±0.22 km/s |
| Proper motion (μ) | RA: −32.140 mas/yr Dec.: 117.417 mas/yr |
| Parallax (π) | 86.0239±0.1516 mas |
| Distance | 37.91 ± 0.07 ly (11.62 ± 0.02 pc) |
| Absolute magnitude (MV) | 4.38 |
| ζ Dor B | |
| Radial velocity (Rv) | −0.88±0.16 km/s |
| Proper motion (μ) | RA: −32.784 mas/yr Dec.: 119.633 mas/yr |
| Parallax (π) | 85.4852 ± 0.0254 mas |
| Distance | 38.15 ± 0.01 ly (11.698 ± 0.003 pc) |
| Details | |
| Zeta Dor A | |
| Mass | 1.02+0.04 −0.06 M☉ |
| Radius | 1.10±0.02 R☉ |
| Luminosity | 1.57±0.07 L☉ |
| Surface gravity (log g) | 4.430±0.050 cgs |
| Temperature | 6,152±48 K |
| Metallicity [Fe/H] | −0.21±0.07 dex |
| Rotational velocity (v sin i) | 15.4±0.8 km/s |
| Age | 580 Myr |
| ζ Dor B | |
| Mass | 0.53 M☉ |
| Radius | 0.61+0.05 −0.03 R☉ |
| Luminosity | 0.084 L☉ |
| Temperature | 4,750±340 K |
| Other designations | |
| ζ Dor, Zet Dor, FK5 189, HD 33262, HR 1674, SAO 233822, WDS 05055-5728 | |
| ζ Dor A: CPD−57°735, GJ 189, HIP 23693 | |
| ζ Dor B: CPD−57°737, GJ 1075, HIP 23708 | |
| Database references | |
| SIMBAD | ζ Dor A |
| ζ Dor B | |
Zeta Doradus, Latinized from ζ Doradus, is a young star system that lies approximately 38 light-years away. The system consists of two widely separated stars, with the primary being bright enough to be observed with the naked eye but the secondary being much a much fainter star that requires telescopic equipment to be observed.