Zeta Doradus

Zeta Doradus
Location of Zeta Doradus (circled)
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) 4.708[2]
ζ Dor B
Right ascension 05h 05m 47.37235s[3]
Declination −57° 33′ 13.7974″[3]
Apparent magnitude (V) 8.932[4]
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]
Distance37.91 ± 0.07 ly
(11.62 ± 0.02 pc)
Absolute magnitude (MV)4.38[5]
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]
Distance38.15 ± 0.01 ly
(11.698 ± 0.003 pc)
Details
Zeta Dor A
Mass1.07[6] M☉
Radius1.07+0.02
−0.07[1] R☉
Luminosity1.550±0.005[1] L☉
Surface gravity (log g)4.38[5] cgs
Temperature6,227+223
−59[1] K
Metallicity [Fe/H]−0.21 ± 0.07[7] dex
Rotational velocity (v sin i)15.4 ± 0.8[5] km/s
Age580 [8] Myr
ζ Dor B
Mass0.53[6] M☉
Radius0.61+0.05
−0.03[3] R☉
Luminosity0.084[3] L☉
Temperature4750 ± 340[9] 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
SIMBADζ 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.

  1. ^ a b c d e f g h i Cite error: The named reference GaiaDR2A was invoked but never defined (see the help page).
  2. ^ "zet Dor". SIMBAD. Centre de données astronomiques de Strasbourg.
  3. ^ a b c d e f g h Cite error: The named reference GaiaDR2B was invoked but never defined (see the help page).
  4. ^ "GJ 1075". SIMBAD. Centre de données astronomiques de Strasbourg.
  5. ^ a b c Cite error: The named reference AmmlerVonEiff2012 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Shaya2011 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Bryden2006 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Maldonado2012 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference BailerJones2011 was invoked but never defined (see the help page).