Star profile
Atria
Alpha Trianguli Australis · Triangulum Australe
Highly luminous starWhat is Atria
Atria is the brightest jewel of the Southern Triangle, a constellation traced by European navigators as they first crossed the equator. A K-class orange giant, she shines with thousands of times the Sun's luminosity despite her cooler temperature. Her name is a 20th-century contraction of «Alpha Trianguli Australis», coined when the southern sky finally received systematic baptisms.
Where it is and when to see it
Atria 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 55° up.
It can be seen from anywhere south of 21° N.
It is the brightest of the 21 stars of Triangulum Australe in our catalogue, which makes it the best starting point for finding your way around the constellation.
The light you see today left it about 390 years ago.
It opens in your browser. Free, no account, nothing to install.
Leave your signature on Atria
Your name and a message go up on the map for everyone to read. Signing is free.
Without a lock, someone else can replace your signature. How the lock works
We'll ask for an email to confirm it's you, no password.
A public signature from a real person. The chosen name is a symbolic denomination within Stelvia, with no official standing or IAU recognition: the sky is not for sale and belongs to no one.
Astronomical data for Atria
- Constellation
- Triangulum Australe
- Apparent magnitude
- 1.91
- Distance
- 390.7 light years
- Coordinates (J2000)
- RA 252.166° · Dec -69.028°
- Catalogue
- HIP 82273 · HD 150798
A symbolic commemorative gift: neither the signature nor the chosen name implies ownership of the star or recognition by the IAU.
Other stars in Triangulum Australe
Triangulum Australe has 21 stars in Stelvia's catalogue. Here are a few of them.
- Beta Trianguli Australis2.83
- Gamma Trianguli Australis2.87
- Delta Trianguli Australis3.86
- Epsilon Trianguli Australis4.11
- Zeta Trianguli Australis4.90
- HIP 821295.10
- Kappa Trianguli Australis5.11
- HIP 808745.19