Star · O9III
Hatysa
Hatysa is a giant star of spectral type O9III in the constellation Orion, 1,633 light-years from the Sun.
| Other names | ι Ori · HIP 26241 |
|---|---|
| Constellation | Orion |
| Distance | 1,633 light-years (500.8 pc) |
| Apparent magnitude | magnitude 2.75 |
| Absolute magnitude | magnitude −5.75 |
| Spectral type | O9III |
| Surface temperature | 13,830 K |
| Luminosity | 43,800 L☉ |
| Radius | 36.4 R☉ |
| Mass | 19.2 M☉ (estimated) |
| Right ascension (J2000) | 5h 35m 26.0s |
| Declination (J2000) | −5° 54′ 36″ |
| Space velocity (relative to the Sun) | 28.7 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 2.75). Visible from the whole Southern Hemisphere and north to latitude 84° N. 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 393. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 29 million years.
The Sun seen from there
From a planet around Hatysa, the Sun would look like a star of magnitude 13.33, 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.