The Constellation Triangulum Australe

by Dominic Ford
Triangulum Australe Triangulum Australe
The constellation Triangulum Australe. Roll mouse over to see labels.
Source: Stellarium.

Triangulum Australe is a small constellation which lies close to the south celestial pole. Across much of the southern hemisphere it is circumpolar, but it appears highest in the evening sky in the months around April.

It is the southern counterpart of Triangulum, and is of a similar size. It was introduced by Keyser & de Houtman in 1598. Comprising of one second-magnitude and two third-magnitude stars, it is a full magnitude brighter than the northern triangle.

The southern triangle is home to only one bright deep sky object, the open cluster NGC 6025, also known as Caldwell 95.

Date First Appeared
1598 (Keyser & de Houtman)
Sky Area
0.3% of the sky
110.0 square degrees
Messier Objects
Triangulum Australe contains no Messier objects
Caldwell Objects
Triangulum Australe contains the following Caldwell object: C95.
The following constellations neighbor Triangulum Australe: Apus, Ara, Circinus, Norma.
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Brightest Objects in Triangulum Australe

Stars Open Clusters Globular Clusters Galaxies
Stars Open Clusters Globular Clusters Galaxies
Atria (mag 1.9) NGC 6025 (mag 5.1) NGC 5938
β-TrA (mag 2.8) IC 4571
γ-TrA (mag 2.8) IC 4595
δ-TrA (mag 3.8) NGC 6156
ε-TrA (mag 4.1) IC 4584
ζ-TrA (mag 4.9) NGC 6183
LP TrA (mag 5.1) IC 4585
κ-TrA (mag 5.1)
HD 148291 (mag 5.2)
ι-TrA (mag 5.3)
θ-TrA (mag 5.5)
X TrA (mag 5.6)
HD 137066 (mag 5.7)
HD 142514 (mag 5.7)
HD 142139 (mag 5.8)
HD 133683 (mag 5.8)
HD 152564 (mag 5.9)
η¹-TrA (mag 5.9)
HD 136672 (mag 5.9)
HD 145689 (mag 5.9)
S TrA (mag 6.5)
HD 353021 (mag 10.5)
HD 140600 (mag 11.2)




Color scheme