Star · G7III
λ² Tuc
λ² Tuc is a giant star of spectral type G7III in the constellation Tucana, 225.4 light-years from the Sun.
| Other names | HIP 4293 |
|---|---|
| Constellation | Tucana |
| Distance | 225.4 light-years (69.1 pc) |
| Apparent magnitude | magnitude 5.45 |
| Absolute magnitude | magnitude 1.25 |
| Spectral type | G7III |
| Surface temperature | 4,530 K |
| Luminosity | 48.5 L☉ |
| Radius | 11.3 R☉ |
| Mass | 2.75 M☉ (estimated) |
| Right ascension (J2000) | 0h 55m 00.3s |
| Declination (J2000) | −69° 31′ 37″ |
| Space velocity (relative to the Sun) | 15.4 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.45). Visible from the whole Southern Hemisphere and north to latitude 20° N. South of latitude 20° S 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 1801. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.0 million years.
The Sun seen from there
From a planet around λ² Tuc, the Sun would look like a star of magnitude 9.03, in the direction where our sky has the constellation Draco. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 3238 7.45 light-years
- HIP 7311 17.4 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.