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 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.
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 40.00 light years and the furthest main star is a distance of 390.00 light years. The average distance to the main stars is 204.33 light years.
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.
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 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.
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 -3.47 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.
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.
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.
|Is a Zodiac Sign||No|
|Area||109.978 sq. deg.|
|Percentage of Night Sky||0.27%|
|Site Exoplanet Count||2|
|Meteor Shower Count||0|
|Nearest Star||Zeta Trianguli Australis|
|Nearest Star with Exoplanet(s)||HD 147018|
|Dimmest Star||HD 145689|
|Furthest Star||HIP 79468|
|Bright Star Count||21|
|Hipparcos Star Count||462|
|Main Star Count||3|
|Messier Deep Space Object Count||0|
|Bordering / Neighbouring / Surrounding Constellations||Norma|
*Note: The number of Non-Messier Deep Space Object Count relates to how many are covered on this site not how many there are.
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