Star · A4V
HIP 9951
HIP 9951 is a main-sequence star of spectral type A4V in the constellation Phoenix, 323.7 light-years from the Sun.
| Constellation | Phoenix |
|---|---|
| Distance | 323.7 light-years (99.2 pc) |
| Apparent magnitude | magnitude 6.50 |
| Absolute magnitude | magnitude 1.52 |
| Spectral type | A4V |
| Surface temperature | 8,120 K |
| Luminosity | 22.6 L☉ |
| Radius | 2.4 R☉ |
| Mass | 2.21 M☉ (estimated) |
| Right ascension (J2000) | 2h 08m 05.7s |
| Declination (J2000) | −41° 52′ 49″ |
| Space velocity (relative to the Sun) | 9.4 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.50). Visible from the whole Southern Hemisphere and north to latitude 48° N. South of latitude 48° S it never sets. It stands highest at midnight in October, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1702. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 5.7 million years.
The Sun seen from there
From a planet around HIP 9951, the Sun would look like a star of magnitude 9.81, in the direction where our sky has the constellation Boötes. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 9539 15.1 light-years
- φ Phe 15.1 light-years
- HIP 9673 17.3 light-years
- HIP 9408 17.4 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.