Star · B2V
57 Ori
57 Ori is a main-sequence star of spectral type B2V in the constellation Orion, 2,000 light-years from the Sun.
| Other names | HIP 27965 |
|---|---|
| Constellation | Orion |
| Distance | 2,000 light-years (613.2 pc) |
| Apparent magnitude | magnitude 5.92 |
| Absolute magnitude | magnitude −3.02 |
| Spectral type | B2V |
| Surface temperature | 12,390 K |
| Luminosity | 2,800 L☉ |
| Radius | 11.5 R☉ |
| Mass | 8.78 M☉ (estimated) |
| Right ascension (J2000) | 5h 54m 56.7s |
| Declination (J2000) | +19° 44′ 59″ |
| Space velocity (relative to the Sun) | 18.2 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.92). Visible from the whole Northern Hemisphere and south to latitude 70° S. North of latitude 70° N it never sets. It stands highest at midnight in December, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 26. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 35 million years.
The Sun seen from there
From a planet around 57 Ori, the Sun would look like a star of magnitude 13.77, in the direction where our sky has the constellation Sagittarius. 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.