Star · M0III
λ Gru
λ Gru is a giant star of spectral type M0III in the constellation Grus, 249.2 light-years from the Sun.
| Other names | HIP 109111 |
|---|---|
| Constellation | Grus |
| Distance | 249.2 light-years (76.4 pc) |
| Apparent magnitude | magnitude 4.47 |
| Absolute magnitude | magnitude 0.05 |
| Spectral type | M0III |
| Surface temperature | 4,040 K |
| Luminosity | 224 L☉ |
| Radius | 30.6 R☉ |
| Mass | 4.26 M☉ (estimated) |
| Right ascension (J2000) | 22h 06m 06.9s |
| Declination (J2000) | −39° 32′ 36″ |
| Space velocity (relative to the Sun) | 60.6 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.47). Visible from the whole Southern Hemisphere and north to latitude 50° N. South of latitude 50° S it never sets. It stands highest at midnight in August, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1777. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.4 million years.
The Sun seen from there
From a planet around λ Gru, the Sun would look like a star of magnitude 9.25, in the direction where our sky has the constellation Leo Minor. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 109631 8.73 light-years
- HIP 109796 14.2 light-years
- HIP 108267 14.4 light-years
- HIP 109839 15.7 light-years
- HIP 108290 16.6 light-years
- HIP 109138 16.8 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.