Theta Doradus

Theta Doradus
Location of θ Doradus (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Dorado
Right ascension 05h 13m 45.45627s[1]
Declination −67° 11′ 06.9351″[1]
Apparent magnitude (V) +4.82[2]
Characteristics
Spectral type K2/3 III CNIb/II[3]
U−B color index +1.38[2]
B−V color index +1.28[2]
Astrometry
Radial velocity (Rv)+10.5±0.8[4] km/s
Proper motion (μ) RA: +18.280[1] mas/yr
Dec.: +38.470[1] mas/yr
Parallax (π)6.6059 ± 0.1344 mas[1]
Distance490 ± 10 ly
(151 ± 3 pc)
Absolute magnitude (MV)−0.56[5]
Details
Mass2.23[6] M☉
Radius16[7] R☉
Luminosity426.6[6] L☉
Surface gravity (log g)2.5[8] cgs
Temperature4,320±59[6] K
Metallicity [Fe/H]−0.16[5] dex
Age1.17[6] Gyr
Other designations
θ Dor, Theta Dor, CPD−67° 401, FK5 196, HD 34649, HIP 24372, HR 1744, SAO 249225[9]
Database references
SIMBADdata

Theta Doradus, Latinized from θ Doradus, is a solitary[10] star in the southern constellation of Dorado. Based upon an annual parallax shift of 6.64 mas as seen from Earth, it is located around 490 light years from the Sun. With an apparent visual magnitude of +4.82,[2] the star is bright enough to be faintly visible to the naked eye.

This is an evolved orange-hued K-type giant star with a stellar classification of K2/3 III CNIb/II,[3] where the suffix indicates it is a chemically peculiar star with a strong CN band.[11] With an age of around 1.17 billion years,[6] it has an estimated 2.23[6] times the mass of the Sun and has expanded to about 16[7] times the Sun's radius. It is radiating 426.6 times the solar luminosity from its photosphere at an effective temperature of 4,320 K.[6]

  1. ^ a b c d e Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Cousins1962 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference houk1979 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Flynn1991 was invoked but never defined (see the help page).
  6. ^ a b c d e f g Cite error: The named reference Luck2015 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference PasinettiFracassini2001 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Zboril2009 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference gray2009 was invoked but never defined (see the help page).