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Theta Volantis

θ Volantis
Location of θ Volantis
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Volans
Right ascension 08h 39m 05.16145s[1]
Declination −70° 23′ 12.2826″[1]
Apparent magnitude (V) 5.19[2]
Characteristics
Spectral type A0 V[3]
U−B color index −0.03[4]
B−V color index +0.01[4]
Astrometry
Radial velocity (Rv)13.00±4.2[2] km/s
Proper motion (μ) RA: +19.15[1] mas/yr
Dec.: −38.28[1] mas/yr
Parallax (π)13.58 ± 0.20 mas[1]
Distance240 ± 4 ly
(74 ± 1 pc)
Absolute magnitude (MV)+1.21[5]
Details
Mass2.3[6] M☉
Luminosity37[7] L☉
Surface gravity (log g)4.08[6] cgs
Temperature8,753[7] K
Rotational velocity (v sin i)98[6] km/s
Age185−364[6] Myr
Other designations
θ Vol, CPD−69°946, FK5 2683, HD 74405, HIP 42425, HR 3460, SAO 256535[8]
Database references
SIMBADdata

Theta Volantis, Latinized from θ Volantis, is a solitary[9][10] star in the southern constellation of Volans. Based upon parallax measurements, is approximately 240 light years from the Sun. It has an apparent visual magnitude of 5.19,[2] which is bright enough to be faintly visible to the naked eye.

Theta Volantis is an A-type main sequence star with a stellar classification of A0 V[3] and a mass around 2.3 times that of the Sun. It is a young star with an estimated age of a few hundred million years, and is spinning rapidly with a projected rotational velocity of 98 km/s.[6] Theta Volantis shines 37 times as brightly as the Sun, with an effective temperature of 8,753 K in its outer atmosphere.[7]

The star has two optical companions: a magnitude 15.0 star at an angular separation of 22.10″ along a position angle of 58°, and a magnitude 10.64 star at an angular separation of 41.3″ along a position angle of 105° (both as of 2000).[11]

  1. ^ a b c d e Cite error: The named reference van Leeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Gontcharov2006 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. ^ a b Cite error: The named reference Mermilliod1986 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Gontcharov2012 was invoked but never defined (see the help page).
  6. ^ a b c d e Cite error: The named reference David2015 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference Mcdonald2012 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference mnras389_2_869 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference DeRosa2014 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference WDSC2014 was invoked but never defined (see the help page).

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