Star · B2III
π⁴ Ori
π⁴ Ori is a giant star of spectral type B2III in the constellation Orion, 842.5 light-years from the Sun.
| Other names | HIP 22549 |
|---|---|
| Constellation | Orion |
| Distance | 842.5 light-years (258.3 pc) |
| Apparent magnitude | magnitude 3.68 |
| Absolute magnitude | magnitude −3.38 |
| Spectral type | B2III |
| Surface temperature | 12,630 K |
| Luminosity | 4,070 L☉ |
| Radius | 13.3 R☉ |
| Mass | 9.76 M☉ (estimated) |
| Right ascension (J2000) | 4h 51m 12.4s |
| Declination (J2000) | +5° 36′ 18″ |
| Space velocity (relative to the Sun) | 23.1 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 3.68). Visible from the whole Northern Hemisphere and south to latitude 84° S. 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 1184. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 15 million years.
The Sun seen from there
From a planet around π⁴ Ori, the Sun would look like a star of magnitude 11.89, in the direction where our sky has the constellation Ophiuchus. 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.