Star · G8I
HIP 117956
HIP 117956 is a supergiant star of spectral type G8I in the constellation Andromeda, 1,708 light-years from the Sun.
| Constellation | Andromeda |
|---|---|
| Distance | 1,708 light-years (523.8 pc) |
| Apparent magnitude | magnitude 6.01 |
| Absolute magnitude | magnitude −2.59 |
| Spectral type | G8I |
| Surface temperature | 4,370 K |
| Luminosity | 1,870 L☉ |
| Radius | 75.5 R☉ |
| Mass | 7.82 M☉ (estimated) |
| Right ascension (J2000) | 23h 55m 33.5s |
| Declination (J2000) | +47° 21′ 21″ |
| Space velocity (relative to the Sun) | 37.3 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.01). Visible from the whole Northern Hemisphere and south to latitude 43° S. North of latitude 43° N it never sets. It stands highest at midnight in September, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 318. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 30 million years.
The Sun seen from there
From a planet around HIP 117956, the Sun would look like a star of magnitude 13.43, in the direction where our sky has the constellation Centaurus. 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.