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an open source database of all discovered extrasolar planets


The planetary system Kepler-47 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-47
Alternative system names KIC 10020423
Right ascension 19 41 11
Declination +46 55 13
Distance [parsec] 1189
Distance [lightyears] 3878
Number of stars in system 2
Number of planets in system 3



An artists depiction of the Kepler-47 system. Credit: NASA/JPL-Caltech/T. Pyle

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, semi-major axis: 0.0836 AU, 7.45 days
    •  Kepler-47 A, stellar object
      •  Kepler-47 B, stellar object
        •  Kepler-47 (AB) b, circumbinary planet, P-type, semi-major axis: 0.296±0.005 AU
          •  Kepler-47 (AB) c, circumbinary planet, P-type, semi-major axis: 0.989±0.016 AU
            •  Kepler-47 (AB) d, circumbinary planet, P-type, semi-major axis: 0.699±0.003 AU

            PlanetsPlanets in the system

            This table lists all planets in the system Kepler-47.

              Kepler-47 (AB) b Kepler-47 (AB) c Kepler-47 (AB) d
            Alternative planet names KIC 10020423 b, KOI-3154 b, 2MASS J19411149+4655136 b, Kepler-47 b KIC 10020423 c, KOI-3154 c, 2MASS J19411149+4655136 c, Kepler-47 c Kepler-47 d
            Description Kepler-47(AB) is a multiplanetary system orbiting a binary star. This is the first system of its kind. One of the binary stars is a Sun-like star, the other one is roughly one-third the size of the Sun. The orbital period of the binary is 7.45 days. Kepler-47(AB) is a multiplanetary system orbiting a binary star. This is the first system of its kind. One of the binary stars is a Sun-like star, the other one is roughly one-third the size of the Sun. The orbital period of the binary is 7.45 days. The outer planet Kepler-47(AB) c is located in the habitable zone where liquid water could exist. This planet was discovered by Orosz et al. 2019. The discovery was made with a space based telescope (0.95 m Kepler Telescope). The parameters listed here are those reported by Orosz et al. 2019 and were imported into the Open Exoplanet Catalogue from the NASA Exoplanet Archive.
            Lists Confirmed planets; Planets in binary systems, P-type
            Mass [Mjup] N/A N/A 0.06+0.08−0.04
            Mass [Mearth] N/A N/A 19+24−12
            Radius [Rjup] 0.272±0.011 0.420±0.018 0.63+0.06−0.04
            Radius [Rearth] 3.04±0.12 4.7±0.2 7.0+0.7−0.5
            Orbital period [days] 49.51±0.04 303.16±0.07 187.37+0.07−0.05
            Semi-major axis [AU] 0.296±0.005 0.989±0.016 0.699±0.003
            Eccentricity < 0.0350 < 0.4110 0.024+0.025−0.017
            Equilibrium temperature [K] 449 245 N/A
            Discovery method transit
            Discovery year 2012 2012 2019
            Last updated [yy/mm/dd] 12/08/28 12/08/28 19/04/25

            starStars in the system

            This table lists all stars in the system Kepler-47.

              Kepler-47 A Kepler-47 B
            Alternative star names KIC 10020423 A, KOI-3154 A KIC 10020423 B, KOI-3154 B
            Mass [MSun] 1.043 0.362
            Radius [RSun] 0.964 0.351
            Age [Gyr] N/A N/A
            Metallicity [Fe/H] N/A N/A
            Temperature [K] 5636 3357
            Spectral type G
            Visual magnitude N/A 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-47 (AB) bKepler-47 (AB) cKepler-47 (AB) 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
            Andrew Tribick ajtribick(at) 2
            Hanno Rein hanno(at) 14
            Marc-Antoine Martinod marc-antoine.martinod(at) 1
            Ryan Varley ryanjvarley(at) 3
            Tobias MüLler Tobias_Mueller(at) 1

            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.