Star · B9V
ω² Aqr
ω² Aqr is a main-sequence star of spectral type B9V in the constellation Aquarius, 156.1 light-years from the Sun.
| Other names | GJ 9836A · HIP 116971 |
|---|---|
| Constellation | Aquarius |
| Distance | 156.1 light-years (47.9 pc) |
| Apparent magnitude | magnitude 4.49 |
| Absolute magnitude | magnitude 1.09 |
| Spectral type | B9V |
| Surface temperature | 10,540 K |
| Luminosity | 47.1 L☉ |
| Radius | 2.06 R☉ |
| Mass | 2.73 M☉ (estimated) |
| Right ascension (J2000) | 23h 42m 43.4s |
| Declination (J2000) | −14° 32′ 42″ |
| Space velocity (relative to the Sun) | 27.0 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.49). Visible from the whole Southern Hemisphere and north to latitude 75° N. South of latitude 75° S it never sets. It stands highest at midnight in September, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1870. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.8 million years.
The Sun seen from there
From a planet around ω² Aqr, the Sun would look like a star of magnitude 8.23, in the direction where our sky has the constellation Leo. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- GJ 9836B 5.75 light-years
- HIP 117002 6.86 light-years
- HIP 117980 12.0 light-years
- HIP 117911 12.6 light-years
- HIP 116352 14.8 light-years
- HIP 117905 15.2 light-years
- PSO J350.4673-19.0783 18.4 light-years
- HIP 118020 19.0 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.