Delta Trianguli Australis

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δ Trianguli Australis
Triangulum Australe constellation map.svg
Red circle.svg

Location of δ TRa (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Coma Berenices
Right ascension 16h 15m 26.26979s[1]
Declination −63° 41′ 08.4492″[1]
Apparent magnitude (V) 3.86[2]
Spectral type G5II[3]
B−V color index +1.10[2]
Radial velocity (Rv) −4.90[4] km/s
Proper motion (μ) RA: 2.73[1] mas/yr
Dec.: −12.92[1] mas/yr
Parallax (π) 5.37 ± 0.17[1] mas
Distance 610 ± 20 ly
(186 ± 6 pc)
Absolute magnitude (MV) −3.9[5]
Luminosity (bolometric) 1,209[6] L
Surface gravity (log g) 1.54[2] cgs
Temperature 4,946[2] K
Metallicity [Fe/H] −0.05[2] dex
Other designations
HR 6030, HD 145544, CPD−63°3854, FK5 602, HIP 79664, SAO 253474, GC 21819, CCDM 16155-6341
Database references

Delta Trianguli Australis (δ TrA, δ Trianguli Australis) is a binary star in the constellation Triangulum Australe. It is approximately 606 light years (182 parsecs) from Earth.

The primary component, Delta Trianguli Australis A, is a yellow G-type giant with an apparent magnitude of +3.86. The companion, Delta Trianguli Australis B, is a 12th magnitude star separated by 30 arcseconds from the primary.[7]


  1. ^ a b c d e Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. arXiv:0708.1752Freely accessible. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. 
  2. ^ a b c d e Luck, R. Earle (2014). "Parameters and Abundances in Luminous Stars". The Astronomical Journal. 147 (6): 137. Bibcode:2014AJ....147..137L. doi:10.1088/0004-6256/147/6/137. 
  3. ^ Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (2011). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society. 410: 190. arXiv:1007.4883Freely accessible. Bibcode:2011MNRAS.410..190T. doi:10.1111/j.1365-2966.2010.17434.x. 
  4. ^ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. 
  5. ^ Reimers, D.; Huensch, M.; Schmitt, J. H. M. M.; Toussaint, F. (1996). "Hybrid stars and the reality of "dividing lines" among G to K bright giants and supergiants". Astronomy and Astrophysics. 310: 813. Bibcode:1996A&A...310..813R. 
  6. ^ McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (2012). "Fundamental parameters and infrared excesses of Hipparcos stars". Monthly Notices of the Royal Astronomical Society. 427: 343. arXiv:1208.2037Freely accessible. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. 
  7. ^ "CPD-63 3854B". SIMBAD. Retrieved 4 October 2012.