Star · B1V
23 Ori
23 Ori is a main-sequence star of spectral type B1V in the constellation Orion, 1,770 light-years from the Sun.
| Other names | HIP 25142 |
|---|---|
| Constellation | Orion |
| Distance | 1,770 light-years (542.6 pc) |
| Apparent magnitude | magnitude 4.99 |
| Absolute magnitude | magnitude −3.68 |
| Spectral type | B1V |
| Surface temperature | 11,510 K |
| Luminosity | 4,470 L☉ |
| Radius | 16.8 R☉ |
| Mass | 10 M☉ (estimated) |
| Right ascension (J2000) | 5h 22m 50.0s |
| Declination (J2000) | +3° 32′ 40″ |
| Space velocity (relative to the Sun) | 20.6 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.99). Visible from the whole Northern Hemisphere and south to latitude 86° 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 256. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 31 million years.
The Sun seen from there
From a planet around 23 Ori, the Sun would look like a star of magnitude 13.50, 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.