Star · M1.5V
GJ 229
GJ 229 is a main-sequence star of spectral type M1.5V in the constellation Lepus, 18.8 light-years from the Sun. It is orbited by 2 confirmed exoplanet(s).
| Other names | Gl 229 · HIP 29295 |
|---|---|
| Constellation | Lepus |
| Distance | 18.8 light-years (5.76 pc) |
| Apparent magnitude | magnitude 8.15 |
| Absolute magnitude | magnitude 9.35 |
| Spectral type | M1.5V |
| Surface temperature | 3,560 K |
| Luminosity | 0.028 L☉ |
| Radius | 0.46 R☉ |
| Mass | 0.509 M☉ |
| Age | 0.4 billion years |
| Right ascension (J2000) | 6h 10m 34.7s |
| Declination (J2000) | −21° 51′ 54″ |
| Space velocity (relative to the Sun) | 20.4 km/s |
In the sky
Too faint for the naked eye (magnitude 8.15); binoculars will find it. 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 December, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 2007. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 333 thousand years.
The Sun seen from there
From a planet around GJ 229, the Sun would look like a star of magnitude 3.63, in the direction where our sky has the constellation Hercules. It would be visible to the naked eye.
Planets
- GJ 229 A c 122-day orbit · 2.87 R⊕
- GJ 229 b 579-day orbit · 3.97 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- Gl 223.2 6.63 light-years
- Gl 205 6.66 light-years
- GJ 3323 7.13 light-years
- Ross 614 7.62 light-years
- Gl 234B 7.62 light-years
- GJ 3379 7.85 light-years
- UGPS J072227.51-054031.2 8.45 light-years
- Kapteyn's Star 9.21 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.