Super-Earth · Kepler-22

Kepler-22 b

ExoplanetsDiscovered 2011

Scientific overview

Kepler-22 b is a super-earth orbiting Kepler-22, completing an orbit every 290 days, about 635 light-years from Earth. It was discovered in 2011 using the transit method.

Host star

Kepler-22

Spectral type

G5 V

Temperature

5,596 K

Mass

0.857 M☉

Discovery and detection

Detection method

Transit Method

Discovery year

2011

Discovered at

Kepler Space Telescope

Knowledge connections

Child ofKepler-22
OrbitsKepler-22
Discovered by methodTransit Method
Discovered by missionKepler Space Telescope
Catalogued inNASA Exoplanet Archive

Quick facts

Class: Super-Earth
Host star: Kepler-22
Discovery method: Transit Method
Discovery year: 2011
Orbital period: 289.8639 d
Semi-major axis: 0.812 AU
Eccentricity: 0.72
Radius: 2.1 R⊕
Mass: 9.1 M⊕
Density: 5.42 g/cm³ · derived
Equilibrium temp.: 279 K
Insolation: 1.01 S⊕
Distance: 635 ly

Density is derived from the archive mass and radius via ρ = M / (4⁄3·π·r³); all other values are catalogued measurements.

Derived values

Computed from source-backed inputs via standard formulae — not observations. Every input and constant is traced below.

Bulk density5.42 g/cm³derived
Formula & inputs
Formula: ρ = M / (4⁄3·π·r³) (v1.0.0, impl v1.0.0)
Inputs:
- massEarth = 9.1 M⊕ · NASA
- radiusEarth = 2.1 R⊕ · NASA
Assumptions: M⊕ = 5.972e+24 kg, R⊕ = 6371000 m (IAU 2015 B3 nominal); Assumes a uniform sphere.
Limitations: Withheld above 30 g/cm³ (inconsistent mass/radius inputs).; Archive mass/radius carry no propagated uncertainty here.
Uncertainty: not propagated (inputs carry no catalogued uncertainty)
Computed as of 2026-06-29.

Quality & authority

Partial

Unreviewed

Description: Complete
Source coverage: Partial
Relationship coverage: Complete
Review coverage: None
Citation coverage: None
Image coverage: Not applicable

Data from the NASA Exoplanet Archive. See source quality.