Universe Guide

Triangulum Australe, The Southern Triangle Constellation

Triangulum Australe Constellation Star Map

Triangulum Australe (Pronounciation:Try-ang-u-lum Ore-strale, Abbrev:TrA, Latin:Trianguli Australis) is a constellation, one of 88 constellations that the night sky is divided into. The sky is not divided up equally between the constellations. Triangulum Australe takes up 109.978 sq. degrees of the night sky which equates to 0.27% of the night sky. Triangulum Australe is the 83rd largest in terms of size in the night sky.

The constellation name means The Southern Triangle . It was not one of the original constellations that had been devised by Ptolemy, instead it was created by Pieter Dirkszoon Keyser and Frederick de Houtman years later.

There are 3 stars that make up the main constellation. The hipparcos satellite scanned and detailed 462 stars. There are 21 stars that can be seen with the naked eye in the constellation on a very clear night sky.

Triangulum Australe is not a member of the Zodiac group of twelve constellations that appear when the Sun sets. Triangulum Australe is a southern hemispheric constellation which means it can't be seen easily or at all from the northern hemisphere.

There are 2 Extrasolar Planets (Exoplanets) in this constellation that are detailed on this site. There is a dedicated page for exoplanets in Triangulum Australe.

There are no deep space objects that were identified by Charles Messier in this constellation. There are no non-Messier deep space objects in this constellation that are covered at present on this site.

The image at the top right of this page was generated using Night Vision, a free to use and download application by Brian Simspon.

Distance to Triangulum Australe

You can't just go to one location and arrive at the constellation because the constellation is made up of stars at different locations and different distances. The nearest main star in the constellation is at a distance of 40.37 light years and the furthest main star is a distance of 390.61 light years. The average distance to the main stars is 204.95 light years.

Triangulum Australe Star Facts

The caveat of these stars are that they are catalogued on this site. If you know of a star that is nearer or further then do let me know in the comments and I'll add it to the site. The stars mentioned are from the Hipparcos catalogue or have been added because of their special status.

Zeta Trianguli Australis, Triangulum Australe's Nearest Star

The nearest star to Earth is Zeta Trianguli Australis which is roughly about 39.52 Light Years from the Earth. The nearest star to the Earth with an exoplanet is HD 147018 which is about 140.1 Light Years.

HIP 79468, Triangulum Australe's Furthest Star

The furthest star that is located in the constellation is HIP 79468 and it is 54360.56 light years away from the Sun. The furthest figure is derived from either the 1997 or 2007 Hipparcos star catalogue parallax figure and it has been known to produce distances that are wrong.

Atria, Brightest Star in Triangulum Australe

The brightest star in Triangulum Australe is Atria and is located about 27.23 light years from the Sun. The star has a apparent magnitude of 1.91 but an absolute magnitude of -3.48 when the star is viewed from a distance of 10 Parsecs or 32.6 Light Years. The star is recognised as being the brightest in the constellation as it has the Bayer status of Alpha.

HD 145689, Triangulum Australe's Dimmest Visible Star

The dimmest star that can be seen in Triangulum Australe with the naked eye is HD 145689. The dim star has an apparent magnitude of 5.95. The dimmest star that a person is able to see with their naked eye is 6.0 magnitude based on the table in the reference. Ref: University of Michigan.

Triangulum Astrale Mythology

There is no Greek Legend behind this constellation. It was created by Pieter Dirkszoon Keyser and Frederick de Houtman to fill in the voids in the astronomical charts. There is a similarly named constellation in the northern hemisphere simple known as Triangulum.

Triangulum Australe Facts

NameTriangulum Australe
Is a Zodiac Sign No
Brightest StarAtria
Area109.978 sq. deg.
Percentage of Night Sky0.27%
Size Position83rd
Hemisphere Southern
Site Exoplanet Count2
Meteor Shower Count0
Nearest StarZeta Trianguli Australis
Nearest Star with Exoplanet(s)HD 147018
Brightest StarAtria
Dimmest StarHD 145689
Furthest StarHIP 79468
Bright Star Count21
Hipparcos Star Count462
Main Star Count3
Messier Deep Space Object Count0
Bordering / Neighbouring / Surrounding ConstellationsNorma

*Note: The number of Non-Messier Deep Space Object Count relates to how many are covered on this site not how many there are.

List of Deep Space Objects (Galaxies, Nebulas, Supernovas, etc) in Triangulum Australe

NameTypeDistanceDeclinationRight Ascension
NGC 5938Elliptical Galaxy-66 51 35.1015 36 26m 268
NGC 5979Planetary Nebula-61 13 05.615 47 41m 16
NGC 6156Spiral Galaxy-60 37 07.85895366416 34 52m 5471584499
NGC 6183Spiral Galaxy-69 22 19.6216 41 41m 913

Comments and Questions

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