Star · A5III
β Tri
β Tri is a giant star of spectral type A5III in the constellation Triangulum, 126.9 light-years from the Sun.
| Other names | HIP 10064 |
|---|---|
| Constellation | Triangulum |
| Distance | 126.9 light-years (38.9 pc) |
| Apparent magnitude | magnitude 3.00 |
| Absolute magnitude | magnitude 0.05 |
| Spectral type | A5III |
| Surface temperature | 8,660 K |
| Luminosity | 92.8 L☉ |
| Radius | 4.28 R☉ |
| Mass | 3.31 M☉ (estimated) |
| Right ascension (J2000) | 2h 09m 32.6s |
| Declination (J2000) | +34° 59′ 14″ |
| Space velocity (relative to the Sun) | 31.0 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 3.00). Visible from the whole Northern Hemisphere and south to latitude 55° S. North of latitude 55° N it never sets. It stands highest at midnight in October, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1899. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.3 million years.
The Sun seen from there
From a planet around β Tri, the Sun would look like a star of magnitude 7.78, in the direction where our sky has the constellation Centaurus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- γ Tri 11.1 light-years
- HIP 11437 14.2 light-years
- HIP 10680 14.6 light-years
- HIP 10679 14.6 light-years
- HIP 10789 15.8 light-years
- HIP 10510 17.1 light-years
- SIMP J01512665+3824122 17.2 light-years
- 2MASSW J0129122+351758 18.3 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.