GJ 436 is 31.8 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this M2.5 V star; the first was found in 2004 by radial velocity (W. M. Keck Observatory).
Fly there in 3DGJ 436 b goes round its star every 2.64 days, 33 times as often as Mercury goes round the Sun.
| Spectral type | M2.5 V |
| Surface temperature | 3,586 K |
| Mass | 0.47 solar masses |
| Radius | 0.455 solar radii |
| Luminosity | 0.026 times the Sun |
| Apparent magnitude | 10.67 |
| Age | about 6 billion years |
| Distance from the Sun | 31.8 light-years (9.8 parsecs) |
| Position (J2000) | RA 175.5505°, Dec 26.7031° |
| Constellation | Leo |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| GJ 436 b | 2.64 days | 0.0291 AU | 4.17 R⊕ | 22.1 M⊕ | Radial Velocity, 2004 |
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.