Star · M2.5 V
GJ 357
GJ 357 is a main-sequence star of spectral type M2.5 V in the constellation Hydra, 30.8 light-years from the Sun. It is orbited by 3 confirmed exoplanet(s).
| Other names | Gl 357 · HIP 47103 |
|---|---|
| Constellation | Hydra |
| Distance | 30.8 light-years (9.44 pc) |
| Apparent magnitude | magnitude 10.91 |
| Absolute magnitude | magnitude 11.04 |
| Spectral type | M2.5 V |
| Surface temperature | 3,510 K |
| Luminosity | 0.0159 L☉ |
| Radius | 0.337 R☉ |
| Mass | 0.342 M☉ |
| Metallicity [Fe/H] | -0.12 |
| Right ascension (J2000) | 9h 36m 01.6s |
| Declination (J2000) | −21° 39′ 39″ |
| Space velocity (relative to the Sun) | 56.8 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.91. Visible from the whole Southern Hemisphere and north to latitude 68° N. South of latitude 68° S it never sets. It stands highest at midnight in February, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1995. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 546 thousand years.
The Sun seen from there
From a planet around GJ 357, the Sun would look like a star of magnitude 4.70, in the direction where our sky has the constellation Pegasus. It would be visible to the naked eye.
Planets
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- Gl 352A 4.93 light-years
- GJ 1129 5.58 light-years
- Gl 352B 5.89 light-years
- HIP 48659 6.30 light-years
- Gl 318 8.92 light-years
- WISEPC J101808.05-244557.7 10.4 light-years
- 2MASS J09211410-2104446 10.4 light-years
- Gl 358 10.5 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.