Star · F7IV
λ¹ Tuc
λ¹ Tuc is a subgiant star of spectral type F7IV in the constellation Tucana, 196.8 light-years from the Sun.
| Other names | HIP 4084 |
|---|---|
| Constellation | Tucana |
| Distance | 196.8 light-years (60.3 pc) |
| Apparent magnitude | magnitude 6.67 |
| Absolute magnitude | magnitude 2.77 |
| Spectral type | F7IV |
| Surface temperature | 6,310 K |
| Luminosity | 6.77 L☉ |
| Radius | 2.18 R☉ |
| Mass | 1.61 M☉ (estimated) |
| Right ascension (J2000) | 0h 52m 24.5s |
| Declination (J2000) | −69° 30′ 13″ |
| Space velocity (relative to the Sun) | 35.7 km/s |
In the sky
Too faint for the naked eye (magnitude 6.67); binoculars will find it. 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 1829. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.5 million years.
The Sun seen from there
From a planet around λ¹ Tuc, the Sun would look like a star of magnitude 8.73, 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 4088 0.22 light-years
- HIP 5943 11.1 light-years
- HIP 6703 12.6 light-years
- HIP 3010 16.0 light-years
- HIP 2137 16.5 light-years
- HIP 6221 16.7 light-years
- HIP 5623 19.0 light-years
- Gl 54.3 19.4 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.