Zeta Doradus
Star in the constellation Dorado / From Wikipedia, the free encyclopedia
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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.
Quick Facts Observation data Epoch J2000.0 Equinox J2000.0, Apparent magnitude (V) ...
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Dorado |
ζ Dor A | |
Right ascension | 05h 05m 30.65618s[1] |
Declination | −57° 28′ 21.7289″[1] |
Apparent magnitude (V) | 4.8191±0.007[2] |
ζ Dor B | |
Right ascension | 05h 05m 47.37235s[3] |
Declination | −57° 33′ 13.7974″[3] |
Apparent magnitude (V) | 9.0206±0.017[2] |
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[1] km/s |
Proper motion (μ) | RA: −32.140[1] mas/yr Dec.: 117.417[1] mas/yr |
Parallax (π) | 86.0239 ± 0.1516 mas[1] |
Distance | 37.91 ± 0.07 ly (11.62 ± 0.02 pc) |
Absolute magnitude (MV) | 4.38[4] |
ζ Dor B | |
Radial velocity (Rv) | −0.88±0.16[3] km/s |
Proper motion (μ) | RA: −32.784[3] mas/yr Dec.: 119.633[3] mas/yr |
Parallax (π) | 85.4852 ± 0.0254 mas[3] |
Distance | 38.15 ± 0.01 ly (11.698 ± 0.003 pc) |
Details | |
Zeta Dor A | |
Mass | 1.07[5] M☉ |
Radius | 1.07+0.02 −0.07[1] R☉ |
Luminosity | 1.550±0.005[1] L☉ |
Surface gravity (log g) | 4.38[4] cgs |
Temperature | 6,227+223 −59[1] K |
Metallicity [Fe/H] | −0.21 ± 0.07[6] dex |
Rotational velocity (v sin i) | 15.4 ± 0.8[4] km/s |
Age | 580 [7] Myr |
ζ Dor B | |
Mass | 0.53[5] M☉ |
Radius | 0.61+0.05 −0.03[3] R☉ |
Luminosity | 0.084[3] L☉ |
Temperature | 4750 ± 340[8] K |
Other designations | |
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 |
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