Star · O9II
HIP 31766
HIP 31766 is a bright giant star of spectral type O9II in the constellation Monoceros, 5,525 light-years from the Sun.
| Constellation | Monoceros |
|---|---|
| Distance | 5,525 light-years (1,694 pc) |
| Apparent magnitude | magnitude 6.23 |
| Absolute magnitude | magnitude −4.91 |
| Spectral type | O9II |
| Surface temperature | 9,170 K |
| Luminosity | 9,610 L☉ |
| Radius | 38.9 R☉ |
| Mass | 12.5 M☉ (estimated) |
| Right ascension (J2000) | 6h 38m 38.2s |
| Declination (J2000) | +1° 36′ 49″ |
| Space velocity (relative to the Sun) | 59.1 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.23). Visible from the whole Northern Hemisphere and south to latitude 88° 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 5,525 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 98 million years.
The Sun seen from there
From a planet around HIP 31766, the Sun would look like a star of magnitude 15.97, in the direction where our sky has the constellation Serpens. 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.