Star · B9III
HIP 87722
HIP 87722 is a giant star of spectral type B9III in the constellation Scorpius, 872.4 light-years from the Sun.
| Constellation | Scorpius |
|---|---|
| Distance | 872.4 light-years (267.5 pc) |
| Apparent magnitude | magnitude 6.05 |
| Absolute magnitude | magnitude −1.09 |
| Spectral type | B9III |
| Surface temperature | 9,290 K |
| Luminosity | 288 L☉ |
| Radius | 6.55 R☉ |
| Mass | 4.58 M☉ (estimated) |
| Right ascension (J2000) | 17h 55m 08.0s |
| Declination (J2000) | −36° 28′ 32″ |
| Space velocity (relative to the Sun) | 20.4 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.05). Visible from the whole Southern Hemisphere and north to latitude 54° N. South of latitude 54° S it never sets. It stands highest at midnight in June, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1154. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 15 million years.
The Sun seen from there
From a planet around HIP 87722, the Sun would look like a star of magnitude 11.97, in the direction where our sky has the constellation Auriga. 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.