Star · F3III
π² Gru
π² Gru is a giant star of spectral type F3III in the constellation Grus, 129.4 light-years from the Sun.
| Other names | HIP 110506 |
|---|---|
| Constellation | Grus |
| Distance | 129.4 light-years (39.7 pc) |
| Apparent magnitude | magnitude 5.62 |
| Absolute magnitude | magnitude 2.63 |
| Spectral type | F3III |
| Surface temperature | 7,030 K |
| Luminosity | 7.56 L☉ |
| Radius | 1.85 R☉ |
| Mass | 1.66 M☉ (estimated) |
| Right ascension (J2000) | 22h 23m 08.0s |
| Declination (J2000) | −45° 55′ 43″ |
| Space velocity (relative to the Sun) | 45.3 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.62). Visible from the whole Southern Hemisphere and north to latitude 44° N. South of latitude 44° 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 1897. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.3 million years.
The Sun seen from there
From a planet around π² Gru, the Sun would look like a star of magnitude 7.82, 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):
- HIP 111078 9.16 light-years
- HIP 110258 9.49 light-years
- HD 213240 9.56 light-years
- HIP 112414 11.1 light-years
- HIP 110843 11.7 light-years
- HIP 112908 12.5 light-years
- HIP 111958 12.5 light-years
- HIP 107936 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.