Yellow-white subgiant · Triangulum Australe
ι Trianguli Australis
Also known as: ι TrA, HIP 80645
mag 5.3130 light-years
About
ι Trianguli Australis is a yellow-white subgiant of magnitude 5.3 in Triangulum Australe, about 130 light-years away.
How to find it
- ι Trianguli Australis is in the constellation Triangulum Australe.
- Best evenings: around mid-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 16° 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
- EyesNeeds a dark sky away from city lights.
- 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 | ι Trianguli Australis (ι TrA) |
|---|---|
| Hipparcos number | HIP 80645 |
| Type | Yellow-white subgiant |
| Spectral type | F4IV |
| Colour | Yellowish whiteB−V colour index 0.38 |
| Magnitude | 5.3The smaller the number, the brighter. |
| Distance | 130 light-yearsThe light you see left it around 1900. |
| Proper motion | 0.059″ per year across the sky |
| Constellation | Triangulum Australe |
| Right ascension (J2000) | 16h 27m 57.3s |
| Declination (J2000) | −64° 03′ 28″ |
Sources and credits
Star data: HYG Database by David Nash, CC BY-SA 4.0. All data sources →