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Triangulum Australe, The Southern Triangle Constellation

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. The constellation gets its name as it 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.

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.

The brightest star in Triangulum Australe is Atria. 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. For a list of named stars, that is stars that don't start HD or HIP, please visit Triangulum Australe Star List Page.

Triangulum Australe Star and Deep Space Object Count

The number of stars that have been catalogued as part of the Hipparcos Star Catalogue from Triangulum Australe is 462. The number of stars that are of magnitude 6.0 or lower in the constellation is 21. The number of stars in the constellation that make up the outline is 4.

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.

Stars of Interest

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. The furthest star that can be located in the constellation is HIP 79468 which is located about 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.

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

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.

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 are no major meteor showers that radiate from within this constellation.

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
Dimmest StarHD 145689
Furthest StarHIP 79468
Bright Star Count21
Hipparcos Star Count462
Main Star Count4
Messier Deep Space Object Count0
*Non-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.

Triangulum Australe Constellation Map

Triangulum Australe Constellation Star Map

The map was generated using Night Vision, an awesome free application by Brian Simpson.

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