Star · K5III
λ Hyi
λ Hyi is a giant star of spectral type K5III in the constellation Hydrus, 216.8 light-years from the Sun.
| Other names | HIP 3781 |
|---|---|
| Constellation | Hydrus |
| Distance | 216.8 light-years (66.5 pc) |
| Apparent magnitude | magnitude 5.09 |
| Absolute magnitude | magnitude 0.98 |
| Spectral type | K5III |
| Surface temperature | 4,040 K |
| Luminosity | 95.1 L☉ |
| Radius | 19.9 R☉ |
| Mass | 3.34 M☉ (estimated) |
| Right ascension (J2000) | 0h 48m 35.4s |
| Declination (J2000) | −74° 55′ 24″ |
| Space velocity (relative to the Sun) | 44.7 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.09). Visible from the whole Southern Hemisphere and north to latitude 15° N. South of latitude 15° 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 1809. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.8 million years.
The Sun seen from there
From a planet around λ Hyi, the Sun would look like a star of magnitude 8.94, 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 1914 6.70 light-years
- HIP 5623 12.6 light-years
- HIP 5700 13.0 light-years
- θ Oct 14.5 light-years
- HIP 45 16.6 light-years
- HIP 3010 18.3 light-years
- HIP 117035 19.6 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.