Star · K1III
51 Ori
51 Ori is a giant star of spectral type K1III in the constellation Orion, 305.6 light-years from the Sun.
| Other names | HIP 26885 |
|---|---|
| Constellation | Orion |
| Distance | 305.6 light-years (93.7 pc) |
| Apparent magnitude | magnitude 4.90 |
| Absolute magnitude | magnitude 0.04 |
| Spectral type | K1III |
| Surface temperature | 4,420 K |
| Luminosity | 159 L☉ |
| Radius | 21.5 R☉ |
| Mass | 3.87 M☉ (estimated) |
| Right ascension (J2000) | 5h 42m 28.6s |
| Declination (J2000) | +1° 28′ 29″ |
| Space velocity (relative to the Sun) | 90.9 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.90). Visible from the whole Northern Hemisphere and south to latitude 89° 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 1720. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 5.4 million years.
The Sun seen from there
From a planet around 51 Ori, the Sun would look like a star of magnitude 9.69, in the direction where our sky has the constellation Ophiuchus. It would be invisible to the naked eye.
Neighbours
The catalogue has no other star within 20 light-years.
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.