Star · B3IV
HIP 55831
HIP 55831 is a subgiant star of spectral type B3IV in the constellation Centaurus, 1,468 light-years from the Sun.
| Constellation | Centaurus |
|---|---|
| Distance | 1,468 light-years (450.1 pc) |
| Apparent magnitude | magnitude 5.22 |
| Absolute magnitude | magnitude −3.05 |
| Spectral type | B3IV |
| Surface temperature | 11,200 K |
| Luminosity | 2,370 L☉ |
| Radius | 12.9 R☉ |
| Mass | 8.36 M☉ (estimated) |
| Right ascension (J2000) | 11h 26m 35.4s |
| Declination (J2000) | −61° 06′ 55″ |
| Space velocity (relative to the Sun) | 30.9 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.22). Visible from the whole Southern Hemisphere and north to latitude 29° N. South of latitude 29° S it never sets. It stands highest at midnight in March, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 558. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 26 million years.
The Sun seen from there
From a planet around HIP 55831, the Sun would look like a star of magnitude 13.10, in the direction where our sky has the constellation Cassiopeia. 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.