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an open source database of all discovered extrasolar planets


The planetary system Kepler-22 hosts at least one planet.

  System parameters
Primary system name Kepler-22
Alternative system names KOI-87, KIC 10593626
Right ascension 19 16 52.1904
Declination +47 53 03.9475
Distance [parsec] 180.0
Distance [lightyears] 587
Number of stars in system 1
Number of planets in system 1



This is an artist's conception illustrating the exoplanet Kepler-22b. The planet lies in the habitable zone of a Sun-like star KIC10593626. The habitable zone around a star is usually defined to be the zone in which liquid water, a requirement for life on Earth, could persist. Scientists do not yet know if the planet has a predominantly rocky, gaseous or liquid composition. It's possible that the world would have clouds in its atmosphere, as depicted here in the artist's interpretation. Credit: NASA/Ames/JPL-Caltech

ArchitectureArchitecture of the system

This list shows all planetary and stellar components in the system. It gives a quick overview of the hierarchical architecture.

  •  Kepler-22, stellar object
    •  Kepler-22 b, planet, semi-major axis: 0.849 AU

    PlanetsPlanets in the system

    This table lists all planets in the system Kepler-22.

      Kepler-22 b
    Alternative planet names KOI-87.01, KOI-87 b, KIC 10593626 b, Gaia DR2 2127941757262806656 b
    Description The planet Kepler-22b has been discovered with the Kepler spacecraft. It is orbiting the solar type Kepler target star KIC10593626. This puts it in the habitable zone with an equilibrium temperature of minus 11 degrees Celsius (plus 11 degrees Fahrenheit). If the planet has an atmosphere similar to that of Earth then the surface temperature is 22 degrees Celsius (71 degrees Fahrenheit). Kepler-22b is the smallest radius planet known to orbit in the habitable zone of any star other than the Sun.
    Lists Confirmed planets
    Mass [Mjup] N/A
    Mass [Mearth] N/A
    Radius [Rjup] 0.217
    Radius [Rearth] 2.43
    Orbital period [days] 290
    Semi-major axis [AU] 0.849
    Eccentricity N/A
    Equilibrium temperature [K] 250
    Discovery method transit
    Discovery year 2011
    Last updated [yy/mm/dd] 11/12/05

    starStars in the system

    This table lists all stars in the system Kepler-22.

    Alternative star names GSC 03546-02301, KIC 10593626, KOI-87, 2MASS J19165219+4753040, UCAC3 276-148830, Gaia DR2 2127941757262806656
    Mass [MSun] 0.970
    Radius [RSun] 0.979
    Age [Gyr] N/A
    Metallicity [Fe/H] N/A
    Temperature [K] 5510
    Spectral type G5
    Visual magnitude N/A

    Planet sizes

    The following plot shows the approximate sizes of the planets in this system The Solar System planets are shown as a comparison. Note that unless the radius has been determined through a transit observation, this is only an approximation (see Lissauer et al. 2011b).

    PlutoMercuryMarsVenusEarthNeptuneUranusSaturnJupiterKepler-22 b

    Habitable zone

    The following plot shows the approximate location of the planets in this system with respect to the habitable zone (green) and the size of the star (red). This is only an estimate, using the star's spectral type and mass. Note that if no green band is shown in the plot, then the planet's orbit is far outside the habitable zone. The equations of Selsis, Kasting et al are used to draw the inner and outer boundaries.

    Habitable zoneKepler-22 b

    referencesScientific references and contributors

    Links to scientific papers and other data sources


    This table lists all links which are relevant to this particular system. Note that this is just a summary. More references to the scientific publications and comments can be found in the commit messages. To see these, head over the github or click here to directly go to the git blame output of this system. In the left column of the output you can see the commit message corresponding to each parameter. It also lists the date of the last commit and the person making the changes. Within the commit message, you will find a link to the scientific publication where the data is taken from. Note that this is a new feature and not all system parameters might have a reference associated with it yet. Please help making this catalogue better and contribute data or references!

    Open Exoplanet Catalogue contributors

    Contributor E-mail Number of commits
    Andrew Tribick ajtribick(at) 2
    Christian Sturm Sol-d(at) 1
    Hanno Rein hanno(at) 7
    Marc-Antoine ma.martinod(at) 1
    Marc-Antoine Martinod marc-antoine.martinod(at) 1
    Ryan Varley ryanjvarley(at) 3

    This table lists all people who have contributed to the Open Exoplanet Catalogue. Please consider contributing! Click here to find out how. You can also view all commits contributing to this file on github.

    xmlData download

    You can download the xml file corresponding to this planetary system, which is part of the Open Exoplanet Catalogue. All information on this page has been directly generated from this XML file. You can also download the entire catalogue over at github. If you prefer to download the dataset as an ASCII tables, you might find the oec_tables repository useful.


    If you spot an error or if you can contribute additional data to this entry, please send an e-mail to Please include the corrected xml file and a reference to where the new data is coming from, ideally a scientific paper. If you are fluent with git and github, you can also create a pull request or open an issue on the Open Exoplanet Catalogue repository. Please include the reference to the relevant scientific paper in your commit message.