Epsilon Trianguli Australis

Stellar classification



  • X 131
  • Y -32
  • Z 150
→ Sol: 202

Object type

  • Star
  • Double or multiple star
  • Infra-Red source
simbad:* eps TrA


Epsilon Trianguli Australis (ε Trianguli Australis) is a star in the southern circumpolar constellation of Triangulum Australe. It is visible to the naked eye with an apparent visual magnitude of +4.11. Based upon an annual parallax shift of 16.17 mas as seen from the Earth, the star is located about 340 light years from the Sun.

This is an evolved K-type giant star with a stellar classification of K0 III. It has around 1−2 times the mass of the Sun and has expanded to 16.2 times the Sun's radius. The star is radiating 91 times the Sun's luminosity from its photosphere at an effective temperature of 5,039 K. It has a magnitude 9.36 optical companion at an angular separation of 81.9 arc seconds along a position angle of 220°, as of 2010.

This article uses material from the Wikipedia article "Epsilon Trianguli Australis", which is released under the Creative Commons Attribution-Share-Alike License 3.0.