Star · B5V
15 Aqr
15 Aqr is a main-sequence star of spectral type B5V in the constellation Aquarius, 723.5 light-years from the Sun.
| Other names | HIP 105164 |
|---|---|
| Constellation | Aquarius |
| Distance | 723.5 light-years (221.8 pc) |
| Apparent magnitude | magnitude 5.83 |
| Absolute magnitude | magnitude −0.90 |
| Spectral type | B5V |
| Surface temperature | 12,100 K |
| Luminosity | 380 L☉ |
| Radius | 4.43 R☉ |
| Mass | 4.96 M☉ (estimated) |
| Right ascension (J2000) | 21h 18m 11.1s |
| Declination (J2000) | −4° 31′ 10″ |
| Space velocity (relative to the Sun) | 20.8 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.83). Visible from the whole Southern Hemisphere and north to latitude 85° N. It stands highest at midnight in August, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1302. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 13 million years.
The Sun seen from there
From a planet around 15 Aqr, the Sun would look like a star of magnitude 11.56, in the direction where our sky has the constellation Hydra. 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.