Star profile
Iota Trianguli Australis
Variable starWhat is Iota Trianguli Australis
Iota Trianguli Australis is a variable F-type star 127 light-years away, set within the compact Southern Triangle. Its light does not hold perfectly still: it pulses with the subtle rhythm of a yellow-white star crossing an instability strip. The constellation, one of the crispest figures of the southern sky, was traced by Dutch navigators as an austral counterpart to the older northern Triangle and is recognised by its near-geometric outline.
Where it is and when to see it
Iota Trianguli Australis lies in the southern celestial hemisphere. It is visible to the naked eye under a dark sky. Its best month of the year is June, when it culminates around midnight.
- From London it never rises above the horizon.
- From New York it never rises above the horizon.
- From Sydney it never sets and culminates about 60° up.
It can be seen from anywhere south of 26° N.
It ranks no. 10 in brightness among the 21 stars of Triangulum Australe in our catalogue. To find it, start from Atria, the brightest: it lies about 5° away (a fist at arm's length covers about 10°).
The light you see today left it about 130 years ago.
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Astronomical data for Iota Trianguli Australis
- Constellation
- Triangulum Australe
- Apparent magnitude
- 5.28
- Distance
- 126.6 light years
- Coordinates (J2000)
- RA 246.989° · Dec -64.058°
- Catalogue
- HIP 80645 · HD 147787
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Other stars in Triangulum Australe
Triangulum Australe has 21 stars in Stelvia's catalogue. Here are a few of them.
- AtriaAlpha Trianguli Australis1.91
- Beta Trianguli Australis2.83
- Gamma Trianguli Australis2.87
- HIP 821295.10
- Kappa Trianguli Australis5.11
- HIP 808745.19
- Theta Trianguli Australis5.50
- HIP 773905.54