Star · K2II
Atria
Atria is a bright giant star of spectral type K2II in the constellation Triangulum Australe, 390.6 light-years from the Sun.
| Other names | α TrA · HIP 82273 |
|---|---|
| Constellation | Triangulum Australe |
| Distance | 390.6 light-years (119.8 pc) |
| Apparent magnitude | magnitude 1.91 |
| Absolute magnitude | magnitude −3.48 |
| Spectral type | K2II |
| Surface temperature | 3,880 K |
| Luminosity | 7,000 L☉ |
| Radius | 186 R☉ |
| Mass | 11.4 M☉ (estimated) |
| Right ascension (J2000) | 16h 48m 39.9s |
| Declination (J2000) | −69° 01′ 40″ |
| Space velocity (relative to the Sun) | 20.8 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 1.91). Visible from the whole Southern Hemisphere and north to latitude 21° N. South of latitude 21° S it never sets. It stands highest at midnight in June, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1635. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 6.9 million years.
The Sun seen from there
From a planet around Atria, the Sun would look like a star of magnitude 10.22, in the direction where our sky has the constellation Camelopardalis. It would be invisible to the naked eye.
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.