Star · A1V
γ TrA
γ TrA is a main-sequence star of spectral type A1V in the constellation Triangulum Australe, 189.8 light-years from the Sun.
| Other names | HIP 74946 |
|---|---|
| Constellation | Triangulum Australe |
| Distance | 189.8 light-years (58.2 pc) |
| Apparent magnitude | magnitude 2.87 |
| Absolute magnitude | magnitude −0.95 |
| Spectral type | A1V |
| Surface temperature | 9,950 K |
| Luminosity | 282 L☉ |
| Radius | 5.64 R☉ |
| Mass | 4.55 M☉ (estimated) |
| Right ascension (J2000) | 15h 18m 54.6s |
| Declination (J2000) | −68° 40′ 46″ |
| Space velocity (relative to the Sun) | 20.3 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 2.87). 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 May, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1836. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.4 million years.
The Sun seen from there
From a planet around γ TrA, the Sun would look like a star of magnitude 8.65, in the direction where our sky has the constellation Cassiopeia. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 75719 12.8 light-years
- HIP 71755 16.6 light-years
- HIP 70239 17.0 light-years
- HIP 77049 18.1 light-years
- HIP 73052 19.8 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.