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| Abbreviation: TrA |
| English Name: The Southern Triangle |
| Genitive: Atria |
| Hemisphere: Southern Hemisphere (Never visible from the UK.) |
| Location: Between the constellations of Pavo and Circinus. |
| Visible between latitudes: +15 and -90 degrees |
| Best season: Summer |
| Seen in three seasons: Spring, Summer and Autumn |
| Best seen in: June to July |
| Seen between: Late April and middle of September. |
| Right Ascension (RA): 16 hour |
| Declination (DEC): -65 degrees |
| Area (square degrees): 110 (83rd) |
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- Simple three-sided figure deep in the southern sky – small constellation, but brighter than its northern counterpart (Triangulum).
o - It Lies in Milky-Way and has one Open Cluster, one accessible planetary nebula.
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Messier Objects in Triangulum Australe
| No Messier objects in Triangulum Australe. |
| . |
More objects in Triangulum Australe
| Select Catalog | No of Objects |
| Barnard (B) | 0x object |
| Caldwell (C) | 1x object |
| Collinder (Cr) | 1x object |
| New General Catalogue (NGC) | 6x objects |
| Index Catalogue (IC) | 4x objects |
| Sharpless (Sh2) | 0x object |
Features of Interest
- NGC 5979 – Planetary Nebula; different to see quality with 3-inch telescope, but clearly showing a hazy disk with 4-inch telescope. (Magnitude: +11.5)
o - NGC 6025 – Open Cluster; rather bright in the Milky-Way, easy to see with binocular – best seen with 4-inch telescope. (Magnitude: +5.1)
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Named Stars
- Atria (bright giant orange star – magnitude; +1.91)
- more list of stars in Triangulum Australe.
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IAU Sky Chart: Triangulum Australe
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Constellations: Southern Celestial Hemisphere
– never seen from the UK
| Apus | Ara | Caelum | Carina | Centaurus | Chameleon |
| Corona Australis | Crux | Dorado | Grus | Horologium | Hydrus |
| Indus | Mensa | Octans | Pavo | Phoenix | Pictor |
| Reticulum | Telescopium | Triangulum Australe | Tucana | Vela | Volans |
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