Star · M3.5 V
GJ 317
GJ 317 is a main-sequence star of spectral type M3.5 V in the constellation Pyxis, 49.5 light-years from the Sun. It is orbited by 2 confirmed exoplanet(s).
| Other names | Gl 317 |
|---|---|
| Constellation | Pyxis |
| Distance | 49.5 light-years (15.2 pc) |
| Apparent magnitude | magnitude 11.98 |
| Absolute magnitude | magnitude 11.07 |
| Spectral type | M3.5 V |
| Surface temperature | 3,500 K |
| Luminosity | 0.0206 L☉ |
| Radius | 0.403 R☉ |
| Mass | 0.402 M☉ |
| Age | 5.0 billion years |
| Metallicity [Fe/H] | -0.02 |
| Right ascension (J2000) | 8h 40m 58.9s |
| Declination (J2000) | −23° 27′ 18″ |
| Space velocity (relative to the Sun) | 85.3 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.98. Visible from the whole Southern Hemisphere and north to latitude 67° N. South of latitude 67° S it never sets. It stands highest at midnight in January, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1976. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 878 thousand years.
The Sun seen from there
From a planet around GJ 317, the Sun would look like a star of magnitude 5.74, in the direction where our sky has the constellation Vulpecula. It would be visible to the naked eye.
Planets
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- GJ 3518 3.22 light-years
- GJ 3533 5.36 light-years
- 2MASSI J0859254-194926 5.85 light-years
- WISEA J082640.45-164031.8 6.62 light-years
- Gl 326B 9.33 light-years
- Gl 326A 9.40 light-years
- GJ 3543 9.62 light-years
- 2MASSI J0847287-153237 10.4 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.