Star · A2V
β² Tuc
β² Tuc is a main-sequence star of spectral type A2V in the constellation Tucana, 166.5 light-years from the Sun.
| Other names | HIP 2487 |
|---|---|
| Constellation | Tucana |
| Distance | 166.5 light-years (51.0 pc) |
| Apparent magnitude | magnitude 4.53 |
| Absolute magnitude | magnitude 0.99 |
| Spectral type | A2V |
| Surface temperature | 8,600 K |
| Luminosity | 38.7 L☉ |
| Radius | 2.81 R☉ |
| Mass | 2.58 M☉ (estimated) |
| Right ascension (J2000) | 0h 31m 33.5s |
| Declination (J2000) | −62° 57′ 56″ |
| Space velocity (relative to the Sun) | 27.6 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.53). Visible from the whole Southern Hemisphere and north to latitude 27° N. South of latitude 27° S it never sets. It stands highest at midnight in September, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1860. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.0 million years.
The Sun seen from there
From a planet around β² Tuc, the Sun would look like a star of magnitude 8.37, in the direction where our sky has the constellation Ursa Major. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- 2MASS J00191296-6226005 7.93 light-years
- HIP 1823 11.5 light-years
- HIP 5462 13.0 light-years
- HIP 1399 13.1 light-years
- η Tuc 13.2 light-years
- HIP 4395 13.7 light-years
- HIP 118321 13.7 light-years
- HIP 1407 13.8 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.