Star · A2V
HIP 109831
HIP 109831 is a main-sequence star of spectral type A2V in the constellation Lacerta, 268.1 light-years from the Sun.
| Constellation | Lacerta |
|---|---|
| Distance | 268.1 light-years (82.2 pc) |
| Apparent magnitude | magnitude 5.72 |
| Absolute magnitude | magnitude 1.15 |
| Spectral type | A2V |
| Surface temperature | 9,950 K |
| Luminosity | 40.7 L☉ |
| Radius | 2.15 R☉ |
| Mass | 2.62 M☉ (estimated) |
| Right ascension (J2000) | 22h 14m 44.4s |
| Declination (J2000) | +42° 57′ 14″ |
| Space velocity (relative to the Sun) | 29.7 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.72). Visible from the whole Northern Hemisphere and south to latitude 47° S. North of latitude 47° N it never sets. 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 1758. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.8 million years.
The Sun seen from there
From a planet around HIP 109831, the Sun would look like a star of magnitude 9.40, in the direction where our sky has the constellation Vela. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 108400 15.3 light-years
- HIP 109014 18.6 light-years
- HIP 109745 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.