Star · B3IV
HIP 117340
HIP 117340 is a subgiant star of spectral type B3IV in the constellation Andromeda, 1,656 light-years from the Sun.
| Constellation | Andromeda |
|---|---|
| Distance | 1,656 light-years (507.7 pc) |
| Apparent magnitude | magnitude 6.08 |
| Absolute magnitude | magnitude −2.45 |
| Spectral type | B3IV |
| Surface temperature | 12,200 K |
| Luminosity | 1,610 L☉ |
| Radius | 8.98 R☉ |
| Mass | 7.49 M☉ (estimated) |
| Right ascension (J2000) | 23h 47m 33.0s |
| Declination (J2000) | +46° 49′ 57″ |
| Space velocity (relative to the Sun) | 27.9 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.08). 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 370. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 29 million years.
The Sun seen from there
From a planet around HIP 117340, the Sun would look like a star of magnitude 13.36, 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.