Star · M4III
δ² Gru
δ² Gru is a giant star of spectral type M4III in the constellation Grus, 356.2 light-years from the Sun.
| Other names | HIP 111043 |
|---|---|
| Constellation | Grus |
| Distance | 356.2 light-years (109.2 pc) |
| Apparent magnitude | magnitude 4.12 |
| Absolute magnitude | magnitude −1.07 |
| Spectral type | M4III |
| Surface temperature | 3,690 K |
| Luminosity | 974 L☉ |
| Radius | 76.3 R☉ |
| Mass | 6.49 M☉ (estimated) |
| Right ascension (J2000) | 22h 29m 45.4s |
| Declination (J2000) | −43° 44′ 57″ |
| Space velocity (relative to the Sun) | 8.1 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.12). Visible from the whole Southern Hemisphere and north to latitude 46° N. South of latitude 46° 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 1670. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 6.3 million years.
The Sun seen from there
From a planet around δ² Gru, the Sun would look like a star of magnitude 10.02, in the direction where our sky has the constellation Ursa Major. It would be invisible to the naked eye.
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.