Star system, 48 light-years
GJ 1214 and its one planet
GJ 1214 b is an exoplanet 2.733 times Earth's width, 48 light-years away, orbiting closer to its star than the habitable zone we compute for it.
GJ 1214 is a star of spectral type M4 V, 48 light-years from us, with one known planet.
Drawn at the system's own scale, every orbit from the Archive's numbers.
What is measured, what is computed, what is imagined.
measured The period, and where the table says so the width and the mass, by the method named in each section.
computed Anything marked computed: the size of an orbit where Kepler's third law corrects the table, the temperature of a bare ball at that distance, the starlight received, and the habitable zone.
imagined The picture is an artist's impression. Nobody has seen the surface of a planet of another star: its colour, clouds and land are not known, and the share picture says so in its corner.
GJ 1214 b
GJ 1214 b is an exoplanet 2.733 times Earth's width, 48 light-years away, orbiting closer to its star than the habitable zone we compute for it.
- Width
- 2.733 × Earth's measured
- Mass
- 8.41 times Earth's measured
- One year
- 1.5804 days measured
- Distance from its star
- 0.01505 au from the Archive
- Temperature of a bare ball there
- 519 K computed, not measured
- Starlight, against Earth's
- 17.2 × computed
It was found as a small, regular dip in its star's light each time it crosses in front of it in 2009. Its orbit is closer to its star than the habitable zone computed for it.
See GJ 1214 b in 3D · The picture is an artist's impression.
The star
- Surface temperature
- 3,101 K
- Width
- 0.216 × the Sun's
- Mass
- 0.182 × the Sun's
- Spectral type
- M4 V
- Distance
- 48 light-years
- Habitable zone, computed
- 0.06497 to 0.1287 au from the star