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: the Sun sits at the opposite point of the sky and the star culminates around midnight. How high it climbs above the horizon depends on the latitude you watch from.
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The signature wall
Stelvia's sky works like a signature wall: anyone can leave their name and a message on a real star, and that signature goes up on the map for everyone to read. Signing is free.
A signature without a lock can be replaced by someone else's. The lock makes the signature permanent and lets you choose a symbolic name for the star, always shown next to the star's catalogue identifier. How the lock works
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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