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The planetary system Kepler-68 hosts at least 3 planets. Note that the system is a multiple star system. It hosts at least 2 stellar components.

  System parameters
Primary system name Kepler-68
Alternative system names KOI-246, KIC 11295426
Right ascension 19 24 07.7644
Declination +49 02 24.957
Distance [parsec] 135±10
Distance [lightyears] 440±33
Number of stars in system 2
Number of planets in system 3

ArchitectureArchitecture of the system

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

  •  Stellar binary
    •  Kepler-68 A, stellar object
      •  Kepler-68 b, planet, semi-major axis: 0.0617±0.0006 AU
        •  Kepler-68 c, planet, semi-major axis: 0.0906±0.0008 AU
          •  Kepler-68 d, planet, semi-major axis: 1.40±0.03 AU
          •  Kepler-68 B, stellar object

          PlanetsPlanets in the system

          This table lists all planets in the system Kepler-68.

            Kepler-68 b Kepler-68 c Kepler-68 d
          Alternative planet names Kepler-68 A b, KIC 11295426 b, KIC 11295426 A b, 2MASS J19240775+4902249 b, KOI-246.01, KOI-246 b, KOI-246 A b Kepler-68 A c, KIC 11295426 c, KIC 11295426 A c, 2MASS J19240775+4902249 c, KOI-246.02, KOI-246 c, KOI-246 A c Kepler-68 A d, KIC 11295426 d, KIC 11295426 A d, 2MASS J19240775+4902249 d, KOI-246.20, KOI-246 d, KOI-246 A d
          Description The inner two planets in the Kepler-68 system are transiting. The outer planet was discovered by radial velocity follow-up observation. Kepler-68 b has a density intermediate between that of ice giants and Earth. The inner two planets in the Kepler-68 system are transiting. The outer planet was discovered by radial velocity follow-up observation. Kepler-68 c is Earth-sized. The inner two planets in the Kepler-68 system are transiting. The outer planet, Kepler-68 d, was discovered by radial velocity follow-up observation. The mass is therefore a lower limit.
          Lists Confirmed planets; Planets in binary systems, S-type
          Mass [Mjup] 0.026+0.008−0.007 0.015+0.008−0.011 0.95±0.04
          Mass [Mearth] 8+3−2 5±3 301±11
          Radius [Rjup] 0.206+0.005−0.008 0.085+0.003−0.004 N/A
          Radius [Rearth] 2.31+0.06−0.09 0.95±0.04 N/A
          Orbital period [days] 5.3988±0.0000 9.6051±0.0001 580±15
          Semi-major axis [AU] 0.0617±0.0006 0.0906±0.0008 1.40±0.03
          Eccentricity 0.02+0.13−0.02 N/A 0.18±0.05
          Equilibrium temperature [K] 1280±90 N/A N/A
          Discovery method transit transit RV
          Discovery year 2013
          Last updated [yy/mm/dd] 15/06/09

          starStars in the system

          This table lists all stars in the system Kepler-68.

            Kepler-68 A Kepler-68 B
          Alternative star names KOI-246 A, KIC 11295426 A, 2MASS J19240775+4902249, TYC 3551-189-1 KOI-246 B, KIC 11295426 B
          Mass [MSun] 1.08±0.05 0.175+0.013−0.010
          Radius [RSun] 1.243±0.019 N/A
          Age [Gyr] 6.3±1.7 N/A
          Metallicity [Fe/H] 0.12±0.07 N/A
          Temperature [K] 5793±74 N/A
          Spectral type G N/A
          Visual magnitude 9.9970±0.0010 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-68 bKepler-68 cKepler-68 d

          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-68 bKepler-68 cKepler-68 d

          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
          Alex Storrs 1
          Andrew Tribick ajtribick(at) 5
          Hanno Rein hanno(at) 6
          Marc-Antoine ma.martinod(at) 1
          Marc-Antoine Martinod marc-antoine.martinod(at) 2
          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.