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Triangulum Australe (abbr. TrA, gen. Trianguli Australis)
The Southern Triangle; a small constellation close to the southern circumpolar region and touched by the southern edge of the Milky Way. Its three leading stars are bright enough to serve as pointers to other constellations nearby, including Apus in the south, Norma in the north, Circinus in the west, and Ara and Pavo in the east. The open cluster NGC 6025 at the boundary with Norma, contains about 30 stars of seventh magnitude and fainter and is a good object for binoculars (distance 2,000 light-years; magnitude 5.1, diameter 12'; R.A. 16h 03.7m, Dec. -60° 20'. See below for details of the constellation's brightest stars.
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| Triangulum Australe. © 2003 Torsten Bronger. Copied here under the terms of the GNU Free Documentation License |
| Stars brighter than magnitude 4.0 | ||||||
|---|---|---|---|---|---|---|
| Star | Visual mag. |
Abs. mag. |
Spectral type |
Distance (lt-yr) |
R.A. (h m s) | Dec. ( ° ' '' ) |
| Alpha (Atria) | 1.91 | -3.62 | K2IIIb | 415 | 16 48 40 | -69 01 39 |
| Beta | 2.83 | 2.38 | F2III | 40 | 15 55 08 | -63 25 50 |
| Gamma | 2.87 | -0.88 | A1V | 183 | 15 18 55 | -68 40 46 |
| Delta | 3.86 | -2.54 | G5IIa | 621 | 16 15 26 | -63 41 08 |
| Constellations |
| Andromeda | Antlia | Apus | Aquarius | Aquila | Ara | Aries | Auriga | Bootes | Caelum | Camelopardalis | Cancer | Canes Venatici | Canis Major | Canis Minor | Capricornus | Carina | Cassiopeia | Centaurus | Cepheus | Cetus | Chamaeleon | Circinus | Columba | Coma Berenices | Corona Austrina | Corona Borealis | Corvus | Crater | Crux | Cygnus | Delphinus | Dorado | Draco | Equuleus | Eridanus | Fornax | Gemini | Grus | Hercules | Horologium | Hydra | Hydrus | Indus | Lacerta | Leo | Leo Minor | Lepus | Libra | Lupus | Lynx | Lyra | Mensa | Microscopium | Monoceros | Musca | Norma | Octans | Ophiuchus | Orion | Pavo | Pegasus | Perseus | Phoenix | Pictor | Pisces | Piscis Austrinus | Puppis | Pyxis | Reticulum | Sagitta | Sagittarius | Scorpius | Sculptor | Scutum | Serpens | Sextans | Taurus | Telescopium | Triangulum | Triangulum Australe | Tucana | Ursa Major | Ursa Minor | Vela | Virgo | Volans | Vulpecula |
Related categories
• NOTABLE STARS
• NEBULAE AND STAR CLUSTERS
• GALAXIES
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