Star · K1III
HIP 112731
HIP 112731 is a giant star of spectral type K1III in the constellation Lacerta, 393.3 light-years from the Sun.
| Constellation | Lacerta |
|---|---|
| Distance | 393.3 light-years (120.6 pc) |
| Apparent magnitude | magnitude 5.43 |
| Absolute magnitude | magnitude 0.02 |
| Spectral type | K1III |
| Surface temperature | 4,370 K |
| Luminosity | 168 L☉ |
| Radius | 22.6 R☉ |
| Mass | 3.93 M☉ (estimated) |
| Right ascension (J2000) | 22h 49m 46.3s |
| Declination (J2000) | +55° 54′ 10″ |
| Space velocity (relative to the Sun) | 61.6 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.43). Visible from the whole Northern Hemisphere and south to latitude 34° S. North of latitude 34° 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 1633. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 7.0 million years.
The Sun seen from there
From a planet around HIP 112731, the Sun would look like a star of magnitude 10.24, in the direction where our sky has the constellation Vela. 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.