Yellow-white giant · Triangulum Australe
β Trianguli Australis
Also known as: β TrA, HIP 77952
mag 2.840 light-years
About
β Trianguli Australis is a yellow-white giant of magnitude 2.8 in Triangulum Australe, about 40 light-years away.
How to find it
- β Trianguli Australis is in the constellation Triangulum Australe.
- Best evenings: around early July it is highest at about 9 pm (10 pm in summer time); a month earlier, two hours later.
- Where on Earth: it is seen well, at least 10° up, from south of 17° N.
When it rises and sets tonight, how high it climbs and how much the Moon gets in the way are worked out in your browser for your place.
What you will see
- EyesEasy, even from town.
- Binoculars (10×50)A sharp point; binoculars bring out its colour and the fainter stars around it.
- Telescope (6–8 inch)Still a point of light at any magnification — stars are too far away to show a disc. Low in the sky, bright stars twinkle and flash colours.
Stars look the same in any instrument: brighter and sharper, but never bigger.
Facts
| Designation | β Trianguli Australis (β TrA) |
|---|---|
| Hipparcos number | HIP 77952 |
| Type | Yellow-white giant |
| Spectral type | F2III |
| Colour | Yellowish whiteB−V colour index 0.32 |
| Magnitude | 2.8The smaller the number, the brighter. |
| Distance | 40 light-yearsThe light you see left it around 1986. |
| Proper motion | 0.44″ per year across the sky |
| Constellation | Triangulum Australe |
| Right ascension (J2000) | 15h 55m 08.7s |
| Declination (J2000) | −63° 25′ 51″ |
Sources and credits
Star data: HYG Database by David Nash, CC BY-SA 4.0. All data sources →