Star lore
Triangulum Australe
Direct answer
Triangulum Australe is a small bright southern constellation forming a nearly equilateral triangle near Centaurus and Ara.
Triangulum Australe is the Southern Triangle, a crisp far-southern three-star pattern.
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At a glance
- Found in
- Constellations & Star Lore
- Related
- Telescopium, Triangulum, Tucana, Vela
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The story behind Triangulum Australe
The Southern Triangle arose from late-sixteenth-century Dutch surveys and appeared in Bayer's 1603 atlas.
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Why Triangulum Australe matters
Triangulum Australe’s three comparatively bright stars make it a valuable orientation figure in a crowded southern Milky Way field.
How to read Triangulum Australe
Find Atria and the two Beta and Gamma stars south of the Centaurus Pointers.
Triangulum Australe in practice: an example
Atria, Alpha Trianguli Australis, marks the triangle's brightest corner.
Where readings of Triangulum Australe go wrong
Triangulum Australe and northern Triangulum are separate constellations despite their matching geometry.
Sources and editorial method
Research references used for this entry include:
- International Astronomical Union: The Constellations - Official names, abbreviations, and boundaries for the 88 modern constellations.
- NASA Space Place: What Are Constellations? - NASA introduction to constellation regions, patterns, visibility, and seasonal sky changes.
- Source
- The Great Almanac Dictionary
- Category
- Constellations & Star Lore
- Last updated
- 2026-09-26
Set the Southern Triangle below Centaurus
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Common questions
What is Triangulum Australe?
Triangulum Australe is a small bright southern constellation forming a nearly equilateral triangle near Centaurus and Ara.
What do people get wrong about Triangulum Australe?
Triangulum Australe and northern Triangulum are separate constellations despite their matching geometry.
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