Triangulum Australe constellation: how to find it, when to see it and what is in it
In short
Triangulum Australe (TrA) is a southern constellation covering 110 square degrees, number 83 of 88 by size. Its brightest star is Atria, a orange bright giant, magnitude 1.9. It is best seen in the evening in July. It never rises over London — it is visible south of 13° north. Its neighbours in the sky: Apus, Ara, Circinus, Norma.
Area: 110 square degrees, 83 of 88 · Neighbours: Apus, Ara, Circinus, Norma · Updated 10 October 2026
How to find Triangulum Australe
- 1
Where it is visible
The constellation rises above the horizon south of 13° north and is well seen from the southern hemisphere.
- 2
Use the neighbours
Find it from the neighbouring constellations: Apus, Ara, Circinus, Norma.
- 3
Brightest stars
The brightest stars of the figure: Atria (1.9ᵐ), β TrA (2.8ᵐ), γ TrA (2.9ᵐ).
When it is visible over London
| Month | Where and when | Conditions |
|---|---|---|
| January — december | — | never rises |
Stars of the constellation
| Star | What it is | Magnitude |
|---|---|---|
| Atria · α TrA | orange bright giant | 1.9ᵐ |
| β TrA | yellow-white giant | 2.8ᵐ |
| γ TrA | white main-sequence star | 2.9ᵐ |
Triangulum Australe FAQ
When is the best time to see Triangulum Australe?
Where is Triangulum Australe in the sky?
What is the brightest star in Triangulum Australe?
Neighbouring and other constellations
Related
Constellation lines: Stellarium, CC BY-SA · star names: IAU WGSN, CC BY 4.0