Star · B2I
χ² Ori
χ² Ori is a supergiant star of spectral type B2I in the constellation Orion, 4,272 light-years from the Sun.
| Other names | HIP 28716 |
|---|---|
| Constellation | Orion |
| Distance | 4,272 light-years (1,310 pc) |
| Apparent magnitude | magnitude 4.64 |
| Absolute magnitude | magnitude −5.95 |
| Spectral type | B2I |
| Surface temperature | 7,890 K |
| Luminosity | 21,400 L☉ |
| Radius | 78.1 R☉ |
| Mass | 15.7 M☉ (estimated) |
| Right ascension (J2000) | 6h 03m 55.2s |
| Declination (J2000) | +20° 08′ 18″ |
| Space velocity (relative to the Sun) | 124.4 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.64). 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 4,272 years ago. At that time the first farming villages were being founded; there was no writing yet. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 76 million years.
The Sun seen from there
From a planet around χ² Ori, the Sun would look like a star of magnitude 15.42, 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.