GJ 229 is 18.8 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this M1.5V star; the first was found in 2014 by radial velocity (Multiple Observatories).
Fly there in 3DGJ 229 b takes 579.5 days to go round its star once.
GJ 229 is one of 3 stars in its system: GJ 229 B drawn from the Washington Double Star Catalog; the position of one more star is not catalogued, so it is not drawn.
| Spectral type | M1.5V |
| Surface temperature | 3,564 K |
| Mass | 0.509 solar masses |
| Radius | 0.46 solar radii |
| Luminosity | 0.028 times the Sun |
| Apparent magnitude | 8.15 |
| Age | about 0.4 billion years |
| Distance from the Sun | 18.8 light-years (5.8 parsecs) |
| Position (J2000) | RA 92.6436°, Dec -21.8677° |
| Constellation | Lepus |
GJ 229 B is a T6 star of magnitude 17.1, with a computed orbit. In 2024 it was 7.8″ from GJ 229, at position angle 163° (Washington Double Star Catalog, 06106-2152 NAJ 1): 44.9 AU on the sky at this distance. The true distance can only be larger. Its colour is estimated from its brightness.
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| GJ 229 A c disputed | 121.9 days | 0.384 AU | 2.87 R⊕ estimated | 8.5814 M⊕ minimum | Radial Velocity, 2020 |
| GJ 229 b disputed | 579.5 days | 1.086 AU | 3.97 R⊕ estimated | 14.938 M⊕ minimum | Radial Velocity, 2014 |
Values are the NASA Exoplanet Archive’s composite parameters. A radius marked estimated comes from a mass–radius relation; a mass marked minimum is M sin i. Planet sizes and colours in the 3D view are renderings: none of these worlds has been photographed as more than a point of light.