Star · K2III
ο² Ori
ο² Ori is a giant star of spectral type K2III in the constellation Orion, 180.3 light-years from the Sun.
| Other names | HIP 22957 |
|---|---|
| Constellation | Orion |
| Distance | 180.3 light-years (55.3 pc) |
| Apparent magnitude | magnitude 4.06 |
| Absolute magnitude | magnitude 0.35 |
| Spectral type | K2III |
| Surface temperature | 4,390 K |
| Luminosity | 123 L☉ |
| Radius | 19.2 R☉ |
| Mass | 3.59 M☉ (estimated) |
| Right ascension (J2000) | 4h 56m 22.3s |
| Declination (J2000) | +13° 30′ 52″ |
| Space velocity (relative to the Sun) | 22.8 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.06). Visible from the whole Northern Hemisphere and south to latitude 76° S. North of latitude 76° 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 1846. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.2 million years.
The Sun seen from there
From a planet around ο² Ori, the Sun would look like a star of magnitude 8.54, in the direction where our sky has the constellation Ophiuchus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 23069 3.56 light-years
- HIP 23498 6.89 light-years
- HIP 23789 8.57 light-years
- HIP 22688 9.15 light-years
- HIP 23155 9.84 light-years
- HIP 22550 10.8 light-years
- HD 31253 11.0 light-years
- HIP 22616 12.8 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.