GJ 1214 is 47.8 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this M4 V star; the first was found in 2009 by transit (MEarth Project).
Fly there in 3DGJ 1214 b goes round its star every 37.9 hours, 56 times as often as Mercury goes round the Sun.
| Spectral type | M4 V |
| Surface temperature | 3,101 K |
| Mass | 0.182 solar masses |
| Radius | 0.2162 solar radii |
| Luminosity | 0.0039 times the Sun |
| Apparent magnitude | 15.1 |
| Age | about 3 billion years |
| Distance from the Sun | 47.8 light-years (14.6 parsecs) |
| Position (J2000) | RA 258.8314°, Dec 4.9607° |
| Constellation | Ophiuchus |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| GJ 1214 b | 37.9 hours | 0.0150 AU | 2.733 R⊕ | 8.41 M⊕ | Transit, 2009 |
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.
For a star of 3,101 K, 0.0039 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.065 to 0.13 AU. None of its known planets orbits inside it. The zone says how much starlight arrives, not whether a planet has water or air. The edges follow Kopparapu et al. (2014), as the 3D view draws them.
The light you see left 48 years ago, within living memory.