Kappa Trianguli Australis

κ Trianguli Australis
Location of κ Trianguli Australis (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Triangulum Australe
Right ascension 15h 55m 29.59831s[1]
Declination −68° 36′ 10.8101″[1]
Apparent magnitude (V) +5.08[2]
Characteristics
Spectral type G3/5 Ib[3]
B−V color index +1.12[2]
Variable type suspected SRD[4]
Astrometry
Radial velocity (Rv)+3.9±0.3[5] km/s
Proper motion (μ) RA: −9.36[1] mas/yr
Dec.: −6.79[1] mas/yr
Parallax (π)2.70 ± 0.26 mas[1]
Distance1,200 ± 100 ly
(370 ± 40 pc)
Absolute magnitude (MV)−2.71[6]
Details
Mass7.0[7] M☉
Luminosity1,761[8] L☉
Surface gravity (log g)1.90[9] cgs
Temperature4,658[10] K
Metallicity [Fe/H]+0.21[9] dex
Rotational velocity (v sin i)7.7±1.0[10] km/s
Age55.2[7] Myr
Other designations
κ TrA, CPD−68° 2585, FK5 3253, HD 141767, HIP 77982, HR 5891, SAO 253342[11]
Database references
SIMBADdata

Kappa Trianguli Australis (κ Trianguli Australis) is a star in the constellation Triangulum Australe.

Kappa Trianguli Australis is a yellow G-type supergiant with an apparent magnitude of +5.08. It is around 1,200 light years from Earth.

A light curve for Kappa Trianguli Australis, plotted from Hipparcos data[12]

It is not generally listed as a variable star but Hipparcos photometry showed small amplitude brightness changes. The dominant period was around 600 days and the amplitude less than a hundredth of a magnitude.[13]

  1. ^ a b c d e Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Cousins1977 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Houk1975 was invoked but never defined (see the help page).
  4. ^ "Kap TrA". The International Variable Star Index. AAVSO – American Association of Variable Star Observers. Retrieved 18 September 2018.
  5. ^ Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference tetzlaff was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Mcdonald2012 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference pastel was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference AmmlerVonEiff2012 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference CDS was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference koen was invoked but never defined (see the help page).